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A comparison of new techniques for the detection and determination of triazine herbicides separated by thin-layer chromatography. III

Fluorescence quenching

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Summary

Various factors affecting the fluorescence quenching properties ofs-triazines on fluorescing silicagel layers have been investigated. An analytical method has been developed which permits the quantitative analysis of these triazines, after Chromatographic separation, with an accuracy of ±5%. The instrumental detection limit for atrazine, based on a 2∶1 signal to background ratio, ranges from 0.40 to 0.25μg per spot depending on the type of silicagel used. The method compares favourably with three other techniques used for the determination of identical samples.

Zusammenfassung

Verschiedene Umstände, die die fluoreszenzlöschenden Eigenschaften vons-Triazinen gegenüber fluoreszierenden Kieselgelschichten beeinflussen, wurden untersucht. Eine Methode zur Bestimmung dieser Triazine nach deren chromatographischer Trennung mit ±5% Genauigkeit wurde ausgearbeitet. Die instrumentelle Erfassungsgrenze für Atrazin mit einem Signal-Untergrundverhältnis von 2∶l liegt zwischen 0,40 und 0,25μg pro Fleck je nach der Art des verwendeten Kieselgels. Das Verfahren ist besser als drei andere, zur Analyse identischer Proben angewandte Methoden.

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Frei, R.W., Freemann, C.D. A comparison of new techniques for the detection and determination of triazine herbicides separated by thin-layer chromatography. III. Mikrochim Acta 56, 1214–1223 (1968). https://doi.org/10.1007/BF01224422

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  • DOI: https://doi.org/10.1007/BF01224422

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