Topic
Color reaction
About: Color reaction is a research topic. Over the lifetime, 1194 publications have been published within this topic receiving 19579 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a method for the spectrophotometric determination of periodate was described based on the above properties, and the method was applied to 2-HBGH and showed that periodate is not oxidized by H2O2, IO3, BrO3 −, S2O8 =, S 2O5 =, ClO4 −, Cl O3 − and Cl o3 − under these conditions.
Abstract: Periodate oxidizes 2-HBGH to a red colored compound in ammonia medium. The reagent is not oxidized by H2O2, IO3 −, BrO3 −, S2O8 =, S2O5 =, ClO4 −, ClO3 − under these conditions. Based on the above properties a method is described for the spectrophotometric determination of periodate.
1 citations
TL;DR: A method is described for the routine determination of glycerides in human serum by isolation and saponification, and a colour reaction with chromotropic acid.
Abstract: A method is described for the routine determination of glycerides in human serum After isolation and saponification, the glycerol is oxidized to formaldehyde, and a colour reaction with chromotropic acid is developed
1 citations
TL;DR: In this paper , a colorimetric method was developed for the determination of 2AP content using chromium hexacarbonyl (Cr(CO)6) as a reagent.
Abstract: At present, there is no colorimetric method for the quantitation of the aroma compound 2-acetyl-1-pyrroline (2AP). A novel colorimetric method was developed for the determination of 2AP content using chromium hexacarbonyl (Cr(CO)6) as a reagent. The reaction of synthetic 2AP with chromium hexacarbonyl reagent solution in the presence of light produced a green product with an absorption maximum (λmax) at 623 nm. GC-MS was used to confirm the color-change reaction, which showed the loss of 2AP after the addition of Cr(CO)6. This novel method enables facile and cost-effective determination of 2AP in fragrant rice. A comparative analysis of fragrant and nonfragrant rice grain extracts showed that no color-change reaction occurred with the nonfragrant rice sample. A limit of detection (LOD) of 2.00 mg L-1 was determined by method validation with an effective linear concentration ranging from 5.00 to 60.00 mg L-1 of 2AP. The results obtained using the developed colorimetric method were consistent with those obtained by automated static headspace gas chromatography with nitrogen-phosphorus detection (SHS-GC-NPD).
1 citations
Patent•
10 Apr 2007
TL;DR: In this article, the color reaction component is first dissolved in solvent, namely vegetal oil C1-C8-alkyl ester, and to thus obtained solution a non-solvent is admixed at rapid stirring, said nonsolvent not dissolving or dissolving insignificantly colour reaction component and being taken in amount as to form supersaturated solution.
Abstract: FIELD: self-copy papers. ^ SUBSTANCE: group of inventions relate to use of microcapsules containing color reaction component. Color reaction component is first dissolved in solvent, namely vegetal oil C1-C8-alkyl ester, and to thus obtained solution a non-solvent is admixed at rapid stirring, said non-solvent not dissolving or dissolving insignificantly color reaction component and being taken in amount as to form supersaturated solution. The latter is directly emulsified in water phase at rapid stirring and, immediately after that, resulting emulsion is processed so that encapsulation takes place therein. Microcapsules obtained in this way are further described as well as their employment in color reaction paper. ^ EFFECT: improved writing quality and economic and environmental advantages. ^ 33 cl, 1 dwg, 4 ex
1 citations
Journal Article•
TL;DR: Porphyrin compounds are a kind of very promising organic color reagents in analytical photometry as mentioned in this paper, and they have been applied to determine many trace metallic ions, and their color performance and application is reviewed, the questions met and improving methods are discussed.
Abstract: Porphyrin compounds are a kind of very promising organic color reagents in analytical photometryAs a kind of highly sensitive color reagents,they have been applied to determine many trace metallic ionsThe color performance and application of porphyrin reagents used as color veagents in the last six years in China are reviewed,the questions met and improving methods are discussed,and their progressing tendency is pointed out as well
1 citations