Analysis of the plant growth regulator chlormequat in soil and water by means of liquid chromatography-tandem mass spectrometry, pressurised liquid extraction, and solid-phase extraction

Trine Henriksen, René K. Juhler, Gyrite Brandt, Jeanne Kjær

Research output: Contribution to journalArticleResearchpeer-review

27 Citations (Scopus)

Abstract

We present a new, precise and accurate method for quantitative analysis of chlormequat in soil and aqueous matrices. The method, which is based on LC-MS/MS, pressurised liquid extraction and solid-phase extraction, is eminently suitable for studying the fate of chlormequat in the soil environment. The limit of detection is 0.003-0.008 μg/L for rainwater, surface water and groundwater and 0.07-0.4 μg/kg for soil. In water samples amended to 0.04 μg/L, precision is better than 10%. The residual content of chlormequat in three agricultural topsoils analysed 4 months after its application was 23-55 μg/kg (12-23% of the amount applied). No trace of chlormequat was detected in groundwater from 66 water supply wells located in rural areas treated with chlormequat.

Original languageEnglish
Pages (from-to)2504-2510
Number of pages7
JournalJournal of Chromatography A
Volume1216
Issue number12
DOIs
Publication statusPublished - 20 Mar 2009

Keywords

  • Chlormequat-chloride
  • Chlorocholine chloride
  • Groundwater
  • Pressurised liquid extraction
  • Quaternary ammonium herbicides

Programme Area

  • Programme Area 2: Water Resources

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