Derivatization and Determination of MCPA in Soil by GC

作者：Cai, Kai; Zhang, Yu-Ping; Bhadury, Pinaki S.; Liu, Bin; Hu, De-Yu^*; Xu, Weiming

来源：Chromatographia, 2010, 72(9-10): 933-939.

DOI：10.1365/s10337-010-1737-0

• Gas chromatography
• Derivatization
• 2-Methyl-4-chlorophenoxyacetic acid in soil

A reliable and sensitive method for determination of MCPA in soil by derivatization through p-toluenesulfonic acid and 1,3-dichloro-2-propanol followed by gas chromatographic detection under ECD mode has been established. After treatment with hydrochloric acid, the soil samples were directly extracted without any clean-up with dichloromethane by vortexing. After derivatization and liquid-liquid extraction, the product was subjected to GC analysis. Under optimized conditions, recovery of MCPA reached 87-91%; intra- and inter-day precision values were recorded in the range 3.4-6.4% and 7.4-8.7%, respectively. Excellent linear relationship was observed within 0.1-10 mu g mL(-1) (0.005-0.5 mg kg(-1)) with linear correlation coefficient (R) of 0.9997. The LOD and LOQ were 0.001 and 0.0026 mg kg(-1), respectively, and the overall sensitivity for detection was found to be in the same range as with the conventional GC-MS technique.

• 出版日期2010-11
• 单位贵州大学