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

II. Reflectance spectroscopy

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Summary

A rapid semi-quantitative method for the analysis of triazine herbicides has been developed. Ultra-violet reflectance spectroscopy was used to evaluate the spots directly from the thin-layer chromatogram. About ± 3% accuracy was obtained if the spots were removed and packed into a suitable reflectance cell. A non-destructive detection method also permitted the elution of the spots and subsequent quantitative analysis of the herbicides by means of absorption spectroscopy with an accuracy of ± 1.5%. The sensitivity was about 1μg per spot for either technique.

Zusammenfassung

Ein rasches halbquantitatives Verfahren zur Analyse von Triazin-Herbiziden wurde entwickelt. Die Flecken eines Dünnschichtchromatogramms werden UV-reflexionsspektroskopisch direkt ausgewertet. Etwa ± 3% Genauigkeit sind zu erzielen, wenn die Flecken entnommen und in eine geeignete Reflexionsmeßzelle gebracht werden. Eine nicht destruktive Nachweismethode ermöglicht die Elution der Flecken und die nachfolgende quantitative Bestimmung der Herbizide durch Absorptionsspektroskopie mit einer Genauigkeit von ± 1,5%. Die Empfindlichkeit beträgt in jedem Fall etwa 1μg pro Fleck.

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Frei, R.W., Nomura, N.S. A comparison of new techniques for the detection and quantitative determination of triazine herbicides separated by thin-layer chromatography. Mikrochim Acta 56, 565–573 (1968). https://doi.org/10.1007/BF01224064

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  • DOI: https://doi.org/10.1007/BF01224064

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