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Development and independent laboratory validation of a simple method for the determination of paraquat and diquat in potato, cereals and pulses
- Source :
- Analytical and Bioanalytical Chemistry, 404(8), 2465-2474, Analytical and Bioanalytical Chemistry 404 (2012) 8, Analytical and Bioanalytical Chemistry
- Publication Year :
- 2012
-
Abstract
- A new sensitive, fast and robust method for the determination of paraquat and diquat residues in potatoes, cereals and pulses is presented. Different extraction conditions (solvent, time and temperature) have been evaluated using barley grain, potatoes and dry lentils containing incurred residues of diquat and paraquat. The finalised procedure involves extraction with a mixture of methanol/water/hydrochloric acid at 80 °C and analysis by liquid chromatography-tandem mass spectrometry. Diquat D4 and Paraquat D6 internal standards were added to the test portions prior to extraction. A small-scale inter-laboratory validation of the developed method for diquat and paraquat using potato and barley samples was conducted by three laboratories. The precision and accuracy of the method were determined from recovery experiments (five replicates) at 0.01 and 0.1 mg kg(-1). The recoveries obtained (n = 180) were in the range of 92-120 % with associated relative standard deviation (RSD) between 1.4-10 % for all compound/commodity/spiking concentration combinations.
- Subjects :
- Paraquat
water
chlormequat residues
Ion suppression in liquid chromatography–mass spectrometry
Hydrochloric acid
Mass spectrometry
01 natural sciences
Biochemistry
Diquat
Mass Spectrometry
Analytical Chemistry
chemistry.chemical_compound
herbicides
Limit of Detection
blood
dilution mass-spectrometry
Solanum tuberosum
BU Microbiological & Chemical Food Analysis
2. Zero hunger
Detection limit
performance liquid-chromatography
Chromatography
Molecular Structure
pears
010405 organic chemistry
010401 analytical chemistry
Extraction (chemistry)
food and beverages
Fabaceae
electrospray-ionization
0104 chemical sciences
Solvent
chemistry
injection
ion suppression
BU Microbiologische & Chemische Voedselanalyse
Edible Grain
Food Analysis
Chromatography, Liquid
Subjects
Details
- Language :
- English
- ISSN :
- 24652474 and 16182642
- Database :
- OpenAIRE
- Journal :
- Analytical and Bioanalytical Chemistry, 404(8), 2465-2474, Analytical and Bioanalytical Chemistry 404 (2012) 8, Analytical and Bioanalytical Chemistry
- Accession number :
- edsair.doi.dedup.....d928bd3a3c6c5af8a52bdbdffa7ded7e