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High-performance thin-layer chromatography of fluorescent whitening agents and their identification in detergents

✍ Scribed by L. Lepri; P.G. Desideri; W. Coas

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
478 KB
Volume
322
Category
Article
ISSN
1873-3778

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✦ Synopsis

The fluorescent whitening agents (FWAs) are widely employed in the production of detergents, textiles, papers and plastics'. Such compounds are present at 0.1-0.6% levels in detergents and are of interest because of their possible role as dermal sensitizers. The identification of individual FWAs has become more and more difficult due to their increasing presence and their different structures.

Most relevant analytical studies have been performed by thin-1ayer2-7 and col-umnsv9 chromatography on silica gel as the stationary phase. Attempts to use silanized silica gel columns generally gave satisfactory results10-12.

As thin-layer chromatography (TLC) is particularly suitable for the analysis of FWAs, we made a study on twenty whitening agents representing the major structural classes using high-performance TLC on ready-for-use plates of silanized silica gel with aqueous and non-aquenous solutions as eluents.

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