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Sodium sulfite

About: Sodium sulfite is a research topic. Over the lifetime, 2548 publications have been published within this topic receiving 18523 citations. The topic is also known as: Na2SO3 & Anhydrous sodium sulfite.


Papers
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Journal ArticleDOI
TL;DR: The luminescence signals of Eu (III)-tolnaftate-sodium dodecyl sulfate were found to be 200-fold more sensitive without the presence of micelle solution, and the proposed method was used for quick and simple determination of tolnaftates in its pharmaceuticals and biological fluids.
Abstract: A highly selective, sensitive, accurate, and reproducible luminescence procedure for determination of antifungal drug tolnaftate was developed. The introduced method was based on the formation of Europa Universalis III (Eu(III))-tolnaftate complex using sodium sulfite as a deoxygenated agent in the presence of acetate buffer (pH = 6) and micellar solution of anionic surfactant sodium dodecyl sulfate. The optimum conditions (effect of pH, buffer, surfactant, Eu(III), and sodium sulfite concentrations) for the luminescence signal were investigated and optimized. The luminescence signals were recorded at λex = 270 nm and λem = 460 nm. The method has a good linear response (0.2-130 μg/mL(-1)) between the luminescence intensity and the concentrations of the drug (r = 0.999), with a LOD 0.07 μg/mL(-1) and LOQ 0.2 μg/mL(-1). The luminescence signals of Eu (III)-tolnaftate-sodium dodecyl sulfate were found to be 200-fold more sensitive without the presence of micelle solution. The interferences of some additives, metals, amino acids, sugars, and other related pharmacological action drugs were examined and no interference was recorded. The proposed method was used for quick and simple determination of tolnaftate in its pharmaceuticals and biological fluids.

4 citations

Patent
08 Oct 2014
TL;DR: In this article, a fire-proof flame-retardant coating is presented, which comprises the following components in parts by weight: 10-16 parts of calcium carbonate, 8-12 parts of hydroxyethyl cellulose, 4-8 parts of sodium hexametaphosphate, 2-4 parts of vinyl acetate, 10-20 parts of dibutyl phthalate and 10-14 parts of Sodium silicate.
Abstract: The invention discloses a fire-proof flame-retardant coating. The coating comprises the following components in parts by weight: 10-16 parts of calcium carbonate, 8-12 parts of hydroxyethyl cellulose, 4-8 parts of sodium hexametaphosphate, 2-4 parts of vinyl acetate, 10-20 parts of dibutyl phthalate, 10-14 parts of sodium silicate, 4-12 parts of sodium sulfate, 2-8 parts of zinc oxide, 8-12 parts of zinc dihydrogen phosphate and 4-8 parts of anhydrous sodium sulfite. The fire-proof flame-retardant coating provided by the invention has the advantages of simpleness in manufacturing, good self-drying property, strong adhesion force, convenience in construction, fire resistance and fire-proof property.

4 citations

Patent
11 Apr 2012
TL;DR: In this article, a preparation method of brominated polystyrene, comprising three steps of catalyzing and brominating, neutralizing washing, and solidifying and separating, is described.
Abstract: The invention relates to a preparation method of brominated polystyrene, comprising three steps of catalyzing and brominating, neutralizing washing, and solidifying and separating The step of catalyzing and brominating comprises the following steps: dissolving polystyrene into dichloroethane solvent, adding antimony trichloride catalyst into the solution, dropwise adding bromine chloride into the solution which is added with antimony trichloride catalyst, wherein the mole ratio of bromine chloride to polystyrene monomer is 38:1-35:1, keeping the temperature at 10-25 DEG C and reacting for 3-4 hours; the step of neutralizing washing comprises the following steps: adding 5wt% of sodium sulfite or sodium bisulfite aqueous solution into the polystyrene reaction liquid after catalyzing and brominating to terminate the reaction, then adding 5wt% of sodium hydroxide solution to be in neutrality, and then washing with water; and the step of solidifying and separating comprises the following steps: adding the brominated polystyrene solution after neutralizing washing into a high-speed stirring device with high shearing force at a speed of 5mL/min-20mL/min, wherein the high-speed stirring device is filled with alcohol separating agent; regulating the rotating speed to be in a range of 2000-3000 rpm; scattering the brominated polystyrene product in the alcohol to cure into small particles; separating solid products, washing with alcohol, then filtering and drying to obtain brominated polystyrene products

4 citations

Journal ArticleDOI
TL;DR: Headspace methanethiol headspace concentrations above aqueous slurries of isolated soy proteins (ISP) increased 17-to 36-fold over the controls with the addition of L-cysteine, indicating that methanETHiol from soy proteins is formed by way of components of a sulfite-to-Cysteine pathway.
Abstract: Mean methanethiol headspace concentrations above aqueous slurries of isolated soy proteins (ISP) increased 17-to 36-fold over the controls with the addition of L-cysteine. Corresponding hydrogen sulfide levels were also greatly increased. Dithiothreitol, sodium sulfite, and glutathione increased headspace methanethiol from aqueous ISPs 23-to 44-fold, 8-to 9-fold, and 5-fold, respectively, but did not elevate hydrogen sulfide. These observations, along with the effects from the addition of dithiothreitol/O-acetyl-serine, the addition of a pyridoxial phosphate inhibitor and the intrinsic sulfite content of ISP samples (22 to 31 ppm), indicate that methanethiol from soy proteins is formed by way of components of a sulfite-to-cysteine pathway.

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202240
202122
202073
2019114
2018143