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Colorant standard is a kind of reference material with high purity, which has been widely used in the analysis of food and cosmetic ingredients mainly to improve the color of products. However, the abuse of colorants, especially some prohibited colorants, has caused frequent food and cosmetic safety incidents, and more and more attention has been paid to the analysis of colorants. Therefore, colorant standards are primarily applied to the analysis of colorants content in products.
Due to the matrix types of food and cosmetic are complex and diverse and the properties of different kinds of colorants vary greatly, the analysis and detection of colorants are great challenges and it is necessary to select appropriate colorant standards. Generally, colorant standards include 2,4-diaminoanisole, brilliant black BN, amaranth, crocetin dialdehyde, green S, brilliant black BK, rhodamine B, sudan red G and others.
The analysis of colorants by liquid chromatography-UV detection method: Generally, many colorants have good absorbability in the UV-visible region. Moreover, UV detector is the most common accessories among many liquid chromatography detectors, and its cost is relatively low. As a standard configuration of daily detection laboratory, liquid chromatography-UV detection method is popular in the analysis and detection of colorants in food and cosmetic industry. Furthermore, colorant standards are necessary for the analysis of colorants by liquid chromatography-UV detection method, especially for the quantitative analysis. Using colorant standards, synthetic colorants such as sunset yellow, seductive red and bright blue can be detected.
The analysis of colorants by liquid chromatography-mass spectrometry: Colorant standards can be used in liquid chromatography-mass spectrometry to analysis the colorants in foods and cosmetics. Liquid chromatography-mass spectrometry is a rapidly developing method in recent years. As a detector of liquid chromatography, mass spectrometry has high sensitivity and good specificity. The separation ability of liquid chromatography and the qualitative detection ability of mass spectrometry are combined to achieve more accurate and sensitive qualitative and quantitative analysis of trace components in foods and cosmetics. When it comes to quantitative analysis, colorant standards are essential.
Others: In addition to the above methods, standard solutions can also be used in many other analysis methods, such as thin-layer chromatography and oscillopolarography. For example, when colorant standards are applied to thin-layer chromatography, rapid and low-cost analysis of the colorants being tested can be performed. Although the sensitivity is lower than that of liquid chromatography, it is very suitable for rapid detection with low sensitivity requirements.
Alfa Chemistry is one of the largest providers of colorant 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.