Free Access
Volume 28, Number 2, March 2000
New trends in material science
Page(s) 155 - 158
Section Original articles
Analusis 28, 155-158 (2000)
DOI: 10.1051/analusis:2000109

Determination of chlormequat in pears by high-performance thin layer chromatography and high-performance liquid chromatography with conductimetric detection

J.-P. Lautié, V. Stankovic and G. Sinoquet

Laboratoire Interrégional de la Direction Générale de la Concurrence et de la Répression des Fraudes, 25, avenue de la République, 91305 Massy, France

(Received November 19, 1999; revised February 29, 2000; accepted March 8, 2000.)

The purpose of this paper is to present two simplified methods which involve inexpensive equipment and which can be applied by all analyst who have to determine chlormequat residues in pears. The two methods use the extraction with methanol and purification by formation of ion-pair with sodium tetraphenylborate. A first method is a high-performance thin layer chromatography (HPTLC), the second is high-performance liquid chromatography (HPLC) with conductimetric detector. The results obtained for the same samples by the two methods are quite comparable. These two methods are rapid and particularly the thin-layer chromatography.

Key words: Chlormequat detection -- pesticide -- plant growth regulator -- pears -- HPTLC -- HPLC.

© EDP Sciences, Wiley-VCH 2000