Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey.

Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey. Research Abstract Details 

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Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey. Abstract Text:

The objective of the present work was to establish information on chlormequat and mepiquat residues in grain for human consumption. Chlormequat (2-chloro-N,N,N-trimethylethylammonium, CAS RN 7003-89-6) and mepiquat (1,1-dimethylpiperidinium, CAS RN 15302-91-7) are plant growth regulators used to stabilize stalks in cereals. The study was part of the Danish National Pesticide Survey, managed by the Danish Veterinary and Food Administration. Samples were collected in autumn 1997. Residue contents were determined with a newly developed liquid chromatographic-tandem mass spectrometric (LC-MS/MS) method for chlormequat analysis. The method was extended to include mepiquat in the present study. Quantitation was done by the internal standards method, using mass chromatograms of the most intense daughter ions of mepiquat (m/z 98), chlormequat (m/z 58), and [13C]-chlormequat (m/z 61, internal standard). For chlormequat, the overall limit of detection (LD) was 6 micrograms/kg and the limit of determination (LOD) was 10 micrograms/kg. For mepiquat, LD was 2 micrograms/kg and LOD was 3 micrograms/kg. Of 77 samples analyzed, 51 contained chlormequat and 11 contained mepiquat. The highest levels of chlormequat were found in samples of oatmeal (3.76 mg/kg) and rye (1.08 mg/kg). In 9 rye grain samples containing chlormequat, 5 also contained mepiquat. However, in all samples analyzed, the residues of chlormequat and mepiquat were below maximum residue limits.

Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey. Publishing Authors By Initials

For similar investigative techniques: epidemiologic methods: statistics as topic: sensitivity and specificity research abstracts see: investigative techniques: epidemiologic methods: statistics as topic: sensitivity and specificity research

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Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of AOAC International

VOLUME: 82

Page Numbers: 331-6

Journal Abbreviation: J AOAC Int

ISSN: 1060-3271

DAY: 17

MONTH: 03

YEAR: 2008

Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey. Information

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LANGUAGE: eng

NlmUniqueID: 9215446

Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey. Keywords Mesh Terms:

KEYWORDS: Sensitivity and Specificity

MESH TERMS: chemistry

Chemical & Substance for Abstract: Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey. Information

Substance Name: Chlormequat

Registry Number: 999-81-5

Grant and Affiliation Information for Residues of chlormequat and mepiquat in grain--results from the Danish National Pesticide Survey.

AFFILIATION: Danish Veterinary and Food Administration, Institute of Food Research and Nutrition, Søborg, Denmark.

Country: UNITED STATES

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MEDLINETA: J AOAC Int

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