The application ingredient analysis of common products

DBP-Dibutyl phthalate are widely used as fragrance ingredients in cosmetics — in particular diethyl phthalate (DEP). DEP is suspected of interfering with hormone function (endocrine disruption), causing reproductive and developmental problems among other health effects. Fragrance recipes are considered trade secrets, so manufacturers are not required to disclose fragrance chemicals in the list of ingredients. The best bet to avoid phthalates in fragrances is to use products that are "fragrance-free" (but beware of products marketed as "unscented" — see Fragrance/Parfum).
Analysis of the standard for the capacity of chloride ion, and the national standard of instrument analysis. Analysis for dissolved in a beaker sample GB, is not easy to shake, dissolution time long, in addition to instrument preparation, electrode soaking treatment, the sample mixture for 2 hours, then the titration, titration end to mapping, measuring data after the calculation, not only the analysis cycle is long, and the toxicity of the reagent of contacts
Standard solution of determination of epoxy equivalent to perchloric acid and glacial acetic acid solution, analysis to dissolve the sample solvent was glacial acetic acid. Glacial acetic acid crystallization point is 15 ℃, when the temperature is below 15 ℃ the solvent crystallization cannot dissolve the sample. The standard titration solution to crystallization cannot titration titration. This analysis room temperature must control more than 15 ℃, the installation of air-conditioning, hot water heater can be taken to solve, but the energy cost is greatly improved, the cost analysis.
Toxicity problem.The original standard analysis project of chloride ion, epoxy value determination of single solvent acetone as solvent, the toxicity is low. GB analysis project epoxy equivalent, easily saponifiable chlorine, chlorine measuring timing solvent chloroform, acetic acid, four triethylamine bromide, ethylene glycol monobutyl ether, methyl ethyl ketone, their toxicity than acetone high. Thus, the GB analysis environment is poor, high toxicity, the analysis of human health effects.

 

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