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Preservative standard is a class of standard analytical substance with high purity. Generally, preservative standards have one or more identified characteristics, which is mainly used for quantitative or qualitative analysis of preservative ingredients in food or cosmetics. The commonly used preservative standards include sorbic acid, benzoic acid, methyl para-hydroxybenzoats, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, hydroquinone and others.
Preservative standards are commonly used in photo spectrophotometry, thin layer chromatography, high performance liquid chromatography, gas chromatography, capillary electrochromatography, micellar electrokinetic capillary chromatography and other detection methods to identify or analyze the types and contents of preservatives.
Analysis preservative ingredients in food field: The improper use of preservatives in the food field will seriously endanger human life, so it is very important to use preservative standards to detect the content of preservatives in food. Preservative standard solutions can be obtained by weighing preservative standards such as sorbic acid, benzoic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate and hydroquinone in a specified amount of solvent. The obtained preservative standard solution is then diluted to get a series of standard solutions of different concentrations, which can be used in high efficiency gas chromatography to quantitatively detect the preservative components in food.
Analysis preservative ingredients in cosmetics field: Preservative standards can be used to detect the content and type of preservatives in cosmetics to ensure the safety and reliability of cosmetics. For example, using benzoic acid as a preservative standard, a standard curve can be plotted using high performance liquid chromatography. In the analysis process, formaldehyde and ammonium acetate are used as mobile phase, and according to the peak position, peak area and peak height, benzoic acid preservatives in cosmetics could be analyzed qualitatively and quantitatively.
Others: In addition to the above fields, preservative standards are widely used in paper industry, wood industry, coating industry and other industries. For example, in the paper industry, preservative standards are mainly used for the detection of isothiazolinone, organic bromine and other substances. In the wood industry, the preservative standards are mainly used in the detection of creosote, cupramine quaternary ammonium salt, inorganic boride and ammonia-soluble copper citrate. In the coating industry, the preservative standards are mainly used for the detection of benzimidazolidine ester and isothiazolinone derivatives.
Alfa Chemistry is one of the largest providers of preservative standards in the world and the quality assurance is of prime importance to Alfa Chemistry. The solvent from Alfa Chemistry in the world is synonymous with reliability and excellent quality. Because of the exacting nature of our business and the regulatory demands placed upon our industry, Alfa Chemistry continues to be at the forefront in terms of compliance, accreditations and certifications.