Journal
ACTA CHROMATOGRAPHICA
Volume 32, Issue 4, Pages 238-241Publisher
AKADEMIAI KIADO ZRT
DOI: 10.1556/1326.2019.00702
Keywords
acetochlor; fluorochloridone; pendimethalin; GC-MS; internal standard method
Categories
Funding
- Science and Technology Project of Jiangsu Provincial Bureau of Quality and Technology Supervision [KJ168375]
- Laboratory Program of Yancheng Institute of Technology
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This paper describes a rapid method to simultaneously determine acetochlor, fluorochloridone and pendimethalin present in a herbicide emulsifiable concentrate (EC) formulation using gas chromatography-mass spectrometry (GC-MS). Selected ion monitoring mode was performed to increase the sensitivity, with dibutyl phthalate as an internal standard. The method was validated with respect to linearity, accuracy, precision, and stability. Chromato-graphic separation was carried out on a TG-5 MS column (30 m x 0.25 mm x 0.25 mu m) with helium as the carrier gas at a flow rate of 1.0 mL/min. Calibration curves were linear over 2.0-20.0 mu g/mL for each analyte, and the limit of quantification was below 20 ng/mL. Good performance in teens of recovery ranging from 94.5% to 102.5% at 3 concentration levels proved excellent accuracy. The intra- and inter-day relative standard deviations for 6 replicate measurements were always less than 5%. The developed method is simple and efficient for the routine determination of the ternary mixtures in a compound herbicide EC formulation product.
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