Showing papers on "Sodium sulfite published in 2014"

Decreased immunoglobulin E (IgE) binding to cashew allergens following sodium sulfite treatment and heating.

Abstract: Cashew nut and other nut allergies can result in serious and sometimes life-threatening reactions. Linear and conformational epitopes within food allergens are important for immunoglobulin E (IgE) binding. Methods that disrupt allergen structure can lower IgE binding and lessen the likelihood of food allergy reactions. Previous structural and biochemical data have indicated that 2S albumins from tree nuts and peanuts are potent allergens, and that their structures are sensitive to strong reducing agents such as dithiothreitol. This study demonstrates that the generally regarded as safe (GRAS) compound sodium sulfite effectively disrupted the structure of the cashew 2S albumin, Ana o 3, in a temperature-dependent manner. This study also showed that sulfite is effective at disrupting the disulfide bond within the cashew legumin, Ana o 2. Immunoblotting and ELISA demonstrated that the binding of cashew proteins by rabbit IgG or IgE from cashew-allergic patients was markedly lowered following treatment with sodium sulfite and heating. The results indicate that incorporation of sodium sulfite, or other food grade reagents with similar redox potential, may be useful processing methods to lower or eliminate IgE binding to food allergens.

Measurement and Correlation of the Phase Equilibrium of Aqueous Two-Phase Systems Composed of Polyethylene(glycol) 1500 or 4000 + Sodium Sulfite + Water at Different Temperatures

Abstract: The equilibrium behaviors of two-phase liquid–liquid systems composed of poly(ethylene glycol) (PEG) 1500 or 4000 + sodium sulfite + water were experimentally determined at temperatures of (288.15, 298.15, 308.15, and 318.15) K. The effects of the molecular weight of PEG and the temperature on the phase separation were studied. The binodal curves were fitted to an empirical equation that correlates the concentrations of PEG 1500 or 4000 and sodium sulfite, and the coefficients for the different temperatures were estimated. The tie-line compositions were estimated and correlated using the Othmer–Tobias and Bancroft equations, and the parameters are reported. The liquid–liquid equilibrium (LLE) experimental data obtained were well-correlated to the activity coefficients of the non-random two-liquid (NRTL) and UNIversal QUAsiChemical (UNIQUAC) models, and the mean deviations were less than 0.36 % and 0.31%, respectively.

Copper and lead separating cyanide-chrome-free beneficiation method for low-grade multi-metal sulfide ore

Abstract: The invention discloses a copper and lead separating cyanide-chrome-free beneficiation method for low-grade multi-metal sulfide ore. The beneficiation method is performed according to the following steps that (1) raw ore after ore grinding and grading enters the step of copper and lead bulk flotation to obtain copper and lead bulk concentrate and bulk flotation tailings, beneficiation reagents including 25# black powder and tetrabutyl ammonium black powder are adopted as collecting agents for copper and lead ore, and sodium sulfite and zinc sulfate are adopted as inhibitors of zinc ore; (2) copper and lead separating flotation is performed on the copper and lead bulk concentrate to obtain qualified copper concentrate and lead concentrate, in the copper and lead separating flotation process, activated carbon is adopted for reagent removal, and an inhibitor combined by sodium sulfite, sodium carboxymethyl cellulose and sodium humate serves as the inhibitor of lead sulfide ore. The beneficiation method has the following advantages of being low in price and production and application cost, it is unnecessary to perform special treatment on ore pulp, the process is easy to control, and technological and economic indexes are stable. The great defect that a dichromate titration method, a cyanide method and a less-cyanide-chrome technology can cause pollution to the environment is overcome, and the usage amount of beneficiation new water is greatly reduced.

Method for preparing sodium lignosulfonate and application of sodium lignosulfonate as a dye dispersant

Abstract: The invention provides a method for preparing sodium lignosulfonate. The method comprises the following steps: (A) providing a lignin suspension; (B) regulating the pH value of the suspension to 4.8-8.5; (C) sequentially adding sodium sulfite and formaldehyde to the suspension with pH value of 4.8-8.5, reacting and filtering to obtain filtrate; (D) mixing the filtrate with a sealant and reacting to obtain sodium lignosulfonate. The method provided by the invention has the advantages that the reaction between lignin and sodium sulfite and formaldehyde is controlled by controlling the adding order of sodium sulfite and formaldehyde; the filtrate obtained through filtering after reaction is reacted with the sealant to react with the free phenol hydroxyl, so that obtained sodium lignosulfonate has good dispersion property, excellent performance when used as the dye dispersant and little textile staining while having high heat stability.

Blackening liquid for chromium-free titanium-zinc panel surface and using method of blackening liquid

Abstract: The invention discloses blackening liquid for a chromium-free titanium-zinc panel surface and a using method of the blackening liquid Raw materials of the blackening liquid comprise a main salt, auxiliary components, a complexing agent, a pH conditioning agent and water, wherein the main salt is one or several of molybdate with the massic volume concentration of 5-40g/L or sodium tungstate with the massic volume concentration of 05-10g/L or copper sulfate with the massic volume concentration of 05-20g/L or silver nitrate with the massic volume concentration of 5-40g/L; the auxiliary components comprise nickel sulfate with the concentration of 10-4g/L, sodium sulfite with the concentration of 05-4g/L, sodium thiosulfate with the concentration of 10-5g/L, aluminium chloride with the concentration of 20-5g/L, zinc chloride with the concentration of 20-5g/L and fluoric acid with the concentration of 0-40g/L A black protective layer of a titanium-zinc panel is obtained by a series of treatment of the titanium-zinc panel workpiece The black protective layer of the titanium-zinc panel is compact, uniform, pitch-black and glossy and has the characteristics of being low in cost, chromium-free, environmental-friendly and the like, the performances of the titanium-zinc panel can reach the level of foreign products, and therefore, the titanium-zinc panel has relatively strong application prospect and market competitiveness

Beneficiation method for complex multi-metal sulfide electrum comprehensive recovery

Abstract: The invention provides a beneficiation method for complex multi-metal sulfide electrum comprehensive recovery According to the technical scheme, an efficient re-separation technology of Knelson concentrators is adopted according to the property and the characteristic of multi-metal sulfide electrum, and coarse gold particles are recovered in the early stage; through composite reagents of sodium sulfite, zinc sulfate and sodium silicate, slurry is highly dispersed, sphalerite and pyrite are inhibited intensively, and a novel collecting agent BK301 is adopted for synchronous flotation enrichment of gold, lead and copper minerals; copper sulfate is adopted for activation, and a fine separation technology is performed many times under high alkalinity (the pH of ore pulp ranges from 11 to 12), influences of slurry are effectively eliminated, and active separation on the sphalerite is achieved; for high-viscosity micro-fine particle cyanidation slag, the composite reagents of lime and zinc sulfate are used for intensively inhibiting copper and sulfur, and optimized lead separation is performed; the adjusting agent sodium pyrophosphate is used for efficient activated separation of copper, and therefore lead separation and copper separation are separately performed

A New Anionic Oxalamide Lauryl Succinate Sodium Sulfonate Gemini Surfactant: Microwave-Assisted Synthesis and Surface Activities

Abstract: An anionic Gemini surfactant, oxalamide lauryl succinate sodium sulfonate, was synthesized successfully through amidation, esterification and sulfonation reactions under microwave irradiation conditions by using maleic anhydride, ethylenediamine, lauryl alcohol, sodium sulfite as the starting materials. The best reaction conditions for synthesize the target product were obtained by single factor and orthogonal optimization methods. FTIR, elemental analysis and 1H-NMR analysis were used to confirm the chemical structure of the surfactant. The critical micelle concentration (CMC) in aqueous solution, surface tension, emulsification capacity and foaming power were determined. The critical micelle concentration and γ CMC are respectively equal to 3.5 × 10−4 mol L−1 and 21.5 mN m−1. It was found that microwave-assisted synthesis is an efficient means of preparation of this anionic Gemini surfactant with shorter times and higher yields.

Novel environmental protection composite dye and preparation method therefor

Abstract: The invention discloses a novel environmental protection composite dye. The composite dye is characterized in that the dye is prepared from the following raw materials, by weight, 100-110 parts of organic dye raw materials, 5-6 parts of xylitol, 2-3 parts of sorbitol, 4-5 parts of octadecanol, 2-3 parts of oleic acid, 1-2 parts of sodium ascorbate, 1-2 parts of tea polyphenol, 1-2 parts of phenolic resin, 3-4 parts of sodium lauryl sulfate, 1-2 parts of sodium persulfate, 4-5 parts of retinoic acid, 1-2 parts of sodium thiosulfate, 2-3 parts of sodium sulfite, 4-5 parts of auxiliary agents and 150 parts of water. The composite dye has excellent high temperature stability, has good dyeing effects on pure cotton, blended fabrics and polyester-cotton fabrics, and can raise the quality of fabrics greatly. The composite dye has good dissolvability, good level-dyeing properties, and little salt dosage, and is a new and environmentally-friendly product.

Study of Sulfite Pretreatment to Prepare Bamboo for Enzymatic Hydrolysis and Ethanol Fermentation

Abstract: We have studied the change in composition for three bamboo species of different ages with sulfite pretreatment and treatment with dilute sulfuric acid. Enzymatic hydrolysis and ethanol fermentation of the hydrolyzate were carried out (sequentially and simultaneously). We show that sulfite pretreatment significantly increases the conversion of cellulose to glucose during enzymatic hydrolysis, and the conversion depends on the type and age of the bamboo. When 2-year moso bamboo is treated at a temperature of 180 °C for 30 minutes with a solution containing 5 % sulfuric acid and 9 % sodium sulfite, conversion of cellulose to glucose during hydrolysis is as high as 89.3 %. A higher ethanol yield results from sequential separate hydrolysis and fermentation than for simultaneous saccharification (hydrolysis) of cellulose and fermentation.

Quick dry adhesive for corrugated paper box and preparation method of quick dry adhesive

Abstract: The invention discloses a quick dry adhesive for a corrugated paper box. The quick dry adhesive is prepared from the following components: corn starch, bentonite, sodium hypochlorite, sodium pyrosulfate, ferrous sulfate, a drier, a 3% (volume concentration) sodium hydroxide solution, borax, sodium sulfite, clean water and a defoamer. The adhesive disclosed by the invention is stable in quality, short in reaction time, fast in natural drying speed, simple in process and easy to operate. A catalyst used in the quick dry adhesive disclosed by the invention is low in cost, stable in performance and can be stored for a long time, and gelation and stratification phenomena cannot be easily caused.

Boiler pre-filming corrosion and scale inhibitor

Abstract: The invention discloses a boiler pre-filming corrosion and scale inhibitor. The boiler pre-filming corrosion and scale inhibitor comprises a pretreatment filming agent, a deoxidizing agent, a scale inhibitor, a pH regulator and a solvent, wherein the pretreatment filming agent is composed of one or more of zinc sulfate, zinc chloride and sodium silicate; the deoxidizing agent is composed of one or more of azodicarbonamide, sodium sulfite and erythorbic acid; the scale inhibitor is composed of one or more of polyepoxy sodium succinate, ethylenediamine tetraacetic acid disodium and sodium polyacrylate; the pH regulator is sodium hydroxide, potassium hydroxide or a mixture of the both; the solvent is water. By virtue of the method, the boiler pre-filming corrosion and scale inhibitor can effectively prevent corroding and scaling from the heat transfer surface of the boiler, enables the boiler to achieve excellent heat transfer performance and prolongs the service life of the boiler, synchronously overcomes the pollution problem of the environment due to the conventional water treatment agent, is beneficial to sustainable development of the environment, and is prepared from non-toxic raw materials, so that the boiler scale dispersing agent is of high safety.

Starch modified polyvinyl alcohol environment-friendly adhesive for buildings and preparation method of adhesive

Abstract: The invention discloses a starch modified polyvinyl alcohol environment-friendly adhesive for buildings and a preparation method of the adhesive The adhesive comprises the following components in parts by weight: 100 parts of polyvinyl alcohol, 300-500 parts of water, 30-40 parts of corn starch, 3-6 parts of sodium hydroxide, 8-15 parts of sodium hypochlorite, 2-5 parts of borax, 2-3 parts of sodium sulfite and 1-2 parts of potassium persulfate The polyvinyl alcohol adhesive is modified with low-price borax and starch simultaneously, the water resistance and bonding strength of the polyvinyl alcohol adhesive are greatly improved, and the adhesive does not contain formaldehyde, does not release irritant gas, does not influence the environmental and body health, belongs to an environment-friendly adhesive and can serve as a waterborne adhesive for buildings or other purposes

Novel metal cooling liquid

Abstract: The invention discloses a novel metal cooling liquid which is prepared from the following raw materials in parts by weight: 13-15 parts of glycerol, 12-14 parts of silicone oil, 8-10 parts of 1, 2-propylene glycol, 12-15 parts of tall oil fatty acid, 5-6 parts of castor oil butyl ester, 6-8 parts of calcium nitrate, 5-6 parts of ammonium sulfate, 7-8 parts of ammonium chloride, 6-10 parts of sodium sulfite, 6-8 parts of potassium sorbate, 3-5 parts of sodium hydrogen carbonate, 4-6 parts of sodium carbonate, 5-8 parts of polyvinyl alcohol resin, 7-9 parts of sodium polyacrylate, 3-5 parts of hydroxyethyl cellulose, 5-8 parts of glycerinum, 3-5 parts of copper sulfate pentahydrate, 3-6 parts of hydrogen peroxide, 8-10 parts of phosphoric acid and 60-80 parts of purified water. The novel metal cooling liquid is high in cooling capacity at different temperatures such as low temperature, medium temperature and high temperature, high in cooling speed and good in compatibility, so that the quality stability of a workpiece is guaranteed.

Effects of sulfhydryl compounds, carbohydrates, organic acids, and sodium sulfite on the formation of lysinoalanine in preserved egg

Abstract: To identify inhibitors for lysinoalanine formation in preserved egg, sulfhydryl compounds (glutathione, L-cysteine), carbohydrates (sucrose, D-glucose, maltose), organic acids (L-ascorbic acid, citric acid, DL-malic acid, lactic acid), and sodium sulfite were individually added at different concentrations to a pickling solution to prepare preserved eggs. Lysinoalanine formation as an index of these 10 substances was determined. Results indicate that glutathione, D-glucose, maltose, L-ascorbic acid, citric acid, lactic acid, and sodium sulfite all effectively diminished lysinoalanine formation in preserved egg albumen and yolk. When 40 and 80 mmol/L of sodium sulfite, citric acid, L-ascorbic acid, and D-glucose were individually added into the pickling solution, the inhibition rates of lysinoalanine in the produced preserved egg albumen and yolk were higher. However, the attempt of minimizing lysinoalanine formation was combined with the premise of ensuring preserved eggs quality. Moreover, the addition of 40 and 80 mmol/L of sodium sulfite, 40 and 80 mmol/L of D-glucose, 40 mmol/L of citric acid, and 40 mmol/L of L-ascorbic acid was optimal to produce preserved eggs. The corresponding inhibition rates of lysinoalanine in the albumen were approximately 76.3% to 76.5%, 67.6% to 67.8%, 74.6%, and 74.6%, and the corresponding inhibition rates of lysinoalanine in the yolk were about 68.7% to 69.7%, 50.6% to 51.8%, 70.4%, and 57.8%. It was concluded that sodium sulfite, D-glucose, L-ascorbic, and citric acid at suitable concentrations can be used to control the formation of lysinoalanine during preserved egg processing.

Low-grade multi-metal sulfide mineral copper and lead separating beneficiation combined inhibitor and application method thereof

Abstract: The invention discloses a low-grade multi-metal sulfide mineral copper and lead separating beneficiation combined inhibitor and an application method thereof. The combined inhibitor is composed of three kinds of beneficiation reagents including sodium sulfite, CMC (carboxy methylated cellulose) and sodium humate. The sodium sulfite belongs to the industrial grade, and the content of the sodium sulfite is larger than 96 percent. The CMC ( carboxy methylated cellulose) belongs to a first-grade industrial product, the active substance content is larger than or equal to 85 percent, and the CMC is in a powder shape. The sodium humate is black powder with the fineness ranging from 100 meshes to 200 meshes, the content of the humic acid (a dry basis) is larger than or equal to 55 percent, the water content is smaller than or equal to 15 percent, and the water insoluble matter content is smaller than or equal to 15 percent. The three kinds of beneficiation reagents need to be prepared with water before being used. By means of the low-grade multi-metal sulfide mineral copper and lead separating beneficiation combined inhibitor, the chromium salt method in which the potassium dichromate serving as the lead ore inhibitor is adopted all the time for separating copper and lead is completely replaced, and the technical problem of polluting the environment due to using of the potassium dichromate is thoroughly solved. The low-grade multi-metal sulfide mineral copper and lead separating beneficiation combined inhibitor is good in copper and lead separating effect, low in cost and free of pollution.

Recycling method of sodium hydrosulfite wastewater

Abstract: The invention provides a recycling method of sodium hydrosulfite wastewater The method comprises the following steps: (1) proportioning the following raw materials: sodium formate, methanol, water, sodium pyrosulfite and sulfur dioxide in proportion, carrying out reaction for 3-6 hours; at the end of reaction, filtering and washing the reaction system to obtain sodium hydrosulfite wastewater and filter cakes, and drying the filter cakes to obtain sodium hydrosulfite; (2) neutralizing the sodium hydrosulfite wastewater by alkali liquor till pH is 8-11, filtering to obtain sodium sulfite, recovering methanol from the filtrate and reusing the recovered methanol in the step (1) and obtaining residual liquor; and (3) standing the residual liquor, separating lower-layer turbid liquor and reusing the lower-layer turbid liquid in the step (2), concentrating and dehydrating the residual supernatant liquid to obtain sodium formate which is reused in the step (1), adding a catalyst in obtained distilled water, and reacting to obtain low COD (Chemical Oxygen Command) wastewater, wherein the low-COD wastewater is used for producing dispersing agents or water reducers The method provided by the invention does not affect the quality of sodium hydrosulfite, and the performance indexes of the dispersing agents or water reducers prepared are not affected

Improved decolorization of colored keratin fibers

Abstract: Multi-component packaging unit (kit of parts) for reductive decolorization of colored fibers, which comprises separately formulated (I) a container (A) containing a cosmetic agent (a) and (II) a container (B) containing a cosmetic agent (b), wherein the agent (a) in container (A) contains (a1) one or more reducing agents from the group consisting of sodium dithionite, zinc dithionite, potassium dithionite, sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, sodium thiosulfate, potassium thiosulfate, ammonium thiosulfate, hydroxymethane sulfinic acid, aminomethane sulfinic acid, cysteine, thiolactic acid, sulfanyl acetic acid (thioglycolic acid) and/or ascorbic acid, (a2) one or more of fatty constituents from the group consisting of C 12 -C 30 -fatty alcohols, C 12 -C 30 -fatty acid triglycerides, C 12 -C 30 -fatty acid monoglycerides, C 12 -C 30 -fatty acid diglycerides, C 12 -C 30 -fatty acid esters, hydrocarbons and/or silicon oils, and has (a3) a water content of no more than 10.0 wt% relative to the total weight of the agent (a), and the agent (b) in container (B) has (b1) a water content of at least 30.0 wt% relative to the total weight of the agent (b). The invention further relates to a method for reductive decolorization of the colored keratin fibers using the multi-component packaging unit.

Reductive Acylation of Nitroarenes to Anilides by Sodium Sulfite in Carboxylic Acids

Abstract: A facile and efficient reductive acylation of aromatic nitro compounds to corresponding anilides using a sodium sulfite–carboxylic acid system for the first time has been reported. The sodium sulfi...

Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain

Abstract: SO2 is very rapidly hydrated to sulfurous acid in water solution at pH value above 6.0, whereby sulfite is yielded from the disassociation of protons. We aimed to improve the sulfite transformation efficiency and provide a basis for the direct utilization of SO2 from flue gas by a microalgal suspension. Chlorella sp. XQ-20044 was cultured in a medium with 20 mmol/L sodium sulfite under different physicochemical conditions. Under light conditions, sulfite concentration in the algal suspension reduced linearly over time, and was completely converted into sulfate within 8 h. The highest sulfite transformation rate (3.25 mmol/(L·h)) was obtained under the following conditions: 35°C, light intensity of 300 μmol/(m2·s), NaHCO3 concentration of 6 g/L, initial cell density (OD540) of 0.8 and pH of 9–10. There was a positive correlation between sulfite transformation rate and the growth of Chlorella, with the conditions favorable to algal growth giving better sulfite transformation. Although oxygen in the air plays a role in the transformation of SO2−3 to SO2−4, the transformation is mainly dependent on the metabolic activity of algal cells. Chlorella sp. XQ-20044 is capable of tolerating high sulfite concentration, and can utilize sulfite as the sole sulfur source for maintaining healthy growth. We found that sulfite ≤20 mmol/L had no obvious effect on the total lipid content and fatty acid profiles of the algae. Thus, the results suggest it is feasible to use flue gas for the mass production of feedstock for biodiesel using Chlorella sp. XQ-20044, without preliminary removal of SO2, assuming there is adequate control of the pH.

Army green zinc-coated chrome-free passivator III for bondy pipe

Abstract: The invention relates to an army green zinc-coated chrome-free passivator III for a bondy pipe. The passivator is prepared by dissolving and uniformly mixing materials such as sodium molybdate, sodium citrate, sodium sulfite, oxalic acid and nickel acetate according to a certain ratio. A passivating film is synthesized, so that the corrosion resistance of a coating is improved; meanwhile, the coating is endowed with the black bright uniform army green passivating film.

Preparation method of antibacterial and antifungal fat-liquoring agent suitable for aged leather

Abstract: The invention relates to a preparation method of an antibacterial and antifungal fat-liquoring agent suitable for aged leather The preparation method comprises the following specific steps: adding lactic acid and hydrogen peroxide into soybean oil, heating and mixing to carry out modification, then carrying out titration on a modified mixture by virtue of a sodium hydroxide solution until the mixture is neutral, and drying the mixture to obtain lactated modified soybean oil; compounding the lactated modified soybean oil, span-80, 2-octyl-4-isothiazoline-3-ketone, sodium sulfite, ethanol, acetic acid and deionized water to prepare an antifungal fat-liquoring agent finally The preparation method has the advantages of versatility, obvious effect, harmlessness and the like

Extraction method for sodiumsulfite as byproduct during production of naphthol by adopting sulfonating alkali fusion method

Abstract: The invention provides an extraction method for sodiumsulfite as a byproduct during the production of naphthol by adopting a sulfonating alkali fusion method. The extraction method is characterized in that the extraction is implemented by using the characteristic that the variation of the solubility of the sodium sulfite at different temperatures is greater, the dilution process of the production technique is that materials obtained after an alkali fusion reaction is completed are placed into a dilution pot; bottom water of 3 tons is prepared in the dilution pot in advance, wherein the bottom water has three sources: firstly, a centrifugally-separated saturated sodium sulfite solution; secondly, waste water generated by cooling smoke gas in a workshop or thirdly, ground flushing water. The process path of extracting the sodium sulfite comprises primary separation, secondary separation, centrifugal separation and drying package of the materials subjected to alkali fusion and dilution or primary separation, secondary separation, centrifugal separation and drying package of acidified materials. According to the extraction method, the technical difficult problems of key projects with low yield, high material separation amount and serious three-waste discharge are solved. The application values of the prepared naphthol and sodium sulfite are expected to be remarkably improved in the fields of spice, textile dyeing auxiliaries, rubber aging inhibitors, organic pigment, leather tanning, dye, medicine and pesticide production and the like.

Lubricating oil for gears

Abstract: The invention discloses lubricating oil for gears. The lubricating oil is composed of the following components by weight: 30-40 parts of base oil, 3-6 parts of polyvinyl ether, 4-8 parts of calcium alkylbenzene sulfonate, 3-7 parts of an ethylene-propylene copolymer, 1-4 parts of sodium sulfite, 4-6 parts of sodium dodecyl benzene sulfonate, 7-11 parts of trichloromethane, 2-6 parts of methyl benzoate, 3-5 parts of an antioxidant, 2-4 parts of triethanolamine, and 6-10 parts of an extreme pressure antiwear agent. With good wear resistance, the lubricating oil provided by the invention can bear the high temperature generated by high speed rotation and engagement of gears, and has good cooling performance and very strong anti-extreme pressure ability at the same time, thus being suitable for engines and large machineries.

Determination of aminophenols and phenol in hair colorants by ultrasound‐assisted solid‐phase dispersion extraction coupled with ion chromatography

Abstract: A simple and reliable ultrasound-assisted solid-phase dispersion extraction coupled with ion chromatography was developed for the determination of aminophenols and phenol. The highly viscous hair colorant was dispersed in solvents using anhydrous sodium sulfite having dual functions of dispersant and antioxidant. The use of anhydrous sodium sulfite did not change the sample volume because it could completely dissolve in solution after matrix dispersion. The extraction and cleanup were combined in one single step for simplifying operation. The extraction process could be rapidly accomplished within 9 min with high sample throughput under the synergistic effects of vibration, ultrasound, and heating. Satisfactory linearity was observed with correlation coefficients higher than 0.9992, and the limits of detection varied from 0.02 to 0.09 mg/L. The applicability of the proposed method was demonstrated by measuring the concentrations of aminophenols and phenol in 32 different commercial hair color products. The recoveries ranged from 86.4-101.2% with the relative standard deviations in the range of 0.52-4.3%. The method offers an attractive alternative for the analysis of trace phenols in complex matrices.

Bacterium resisting type high water absorption resin and preparation method thereof

Abstract: The present invention relates to bacterium resisting type high water absorption resin and a preparation method thereof. The resin is a functional polymer material prepared by redox initiation system water solution polymerization method, the resin has a long chain containing allyl structures, a side chain containing carboxylic acid groups and carboxylic acid sodium, and an inner-crosslinking porous network structure, and the internal or external of particles contains a solubilizing quaternary ammonium salt positive ion monomer, an oxidizing agent is sodium persulfate and ammonium persulfate, a reducing agent is sodium sulfite or sodium bisulfite, and a crosslinking agent is N, N '-methylene bis acrylamide or polyethylene glycol diacrylate. The prepared high water absorbent resin has excellent water absorption and water retention properties, high liquid passing performance and high liquid absorption speed, most prominently has good antibacterial properties, and is applicable to the production of adult diapers, sanitary napkins, baby diapers and other water absorption hygiene materials.