Jane Cooper1, Jeremy Marchand2
1 Waters Corporation, Manchester, UK
2 University of Nantes, France
introduction
At first, all dyes were natural compounds, but then people developed various cheap synthetic dyes that could be produced quickly. According to the use in the dyeing process, people have classified synthetic dyes. Lipophilic disperse dyes are used for dyeing many synthetic fibers, such as polyester, nylon, cellulose acetate, synthetic velvet, and polyvinyl chloride. Anionic acid dyes, cationic basic dyes and direct dyes are widely used in natural and synthetic fibers. For example, acid dyes can be used for silk, wool, nylon and modified acrylic fibers; basic dyes can be used for acrylic fibers, wool, silk and paper; direct dyes can be used for cotton and paper
Zhang, leather, wool, silk and nylon.
In order to protect consumers, employees and the community environment, many companies have produced a restricted substance list (RSL). RSL lists in detail the legal and non-regulatory requirements that are followed at every stage of the product supply production chain to reduce and eliminate hazardous substances and processes. In this case, they also incorporate environmental sustainability into their products to ensure the safety of their products and comply with regulatory requirements. In the RSL of many consumer product suppliers, many potential harmful disperse dyes, acid dyes, direct dyes and basic dyes are described in detail. For various dyes, countries and international organizations have formulated regulatory and non-regulatory requirements and standards, including: European Standardization Committee on toy safety standards (BS EN 71 Part 9), Oeko-Tex standard 1000, European Commission resolution (2009 / 567 / EC) and the German Food and Commodity Law (LFGB§30), etc. All standards specify many potential allergenic, carcinogenic, mutagenic or reproductively toxic dyes as restricted substances. The standard method for the analysis of disperse dyes in textiles and their components is DIN54231, which is performed using high-performance liquid chromatography (HPLC) or thin-layer chromatography (TLC), and detected using ultraviolet (UV), mass spectrometry (MS) or optical density .
Solution advantages
This application note describes high-throughput processing methods for identification and quantification of sensitizing and carcinogenic disperse dyes, acid dyes, direct dyes, and basic dyes in consumer products, and has the following advantages:
â– Shorten the running time, thereby reducing the amount of solvent.
â– Compared with existing methods, improve sensitivity, selectivity and robustness.
Waters Solutions
ACQUITY UPLC® H-Class system
Xevo® TQD
MassLynx â„¢ mass spectrometry software
ACQUITY UPLC BEH C18 column
in conclusion
Through the combination of Xevo TQD and ACQUITY UPLC H-Class system, a method for the analysis of disperse dyes, acid dyes, direct dyes and basic dyes has been developed, which has the characteristics of fast, high selectivity and high sensitivity. Xevo TQD is equipped with fast polarity switching technology that enables UPLC analysis of both positive and negative ion dyes in a single injection.
Compared with the traditional standard method, this method has the following advantages:
â– When comparing HPLC / UV with UPLC / MS analysis, using UPLC analysis brings better economic benefits, including a five-fold increase in sample processing capacity and a 86% reduction in solvent usage.
â– The combination of Xevo TQD and ACQUITY UPLC H-Class system improves sensitivity and selectivity, thereby increasing the confidence of identification and quantification.
â– Use Waters method development tools to quickly convert HPLC methods to UPLC methods. These tools include: Waters column selectivity charts to help select the appropriate UPLC column; ACQUITY UPLC column calibrators to help develop UPLC conditions.
To download the complete application summary, please click: http: //? Lid = 134717859 & cid = 511436 & locale = zh_CN
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