Derivatization and Determination of MCPA in Soil by GC
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- 作者：Kai Cai ; Yu-Ping Zhang ; Pinaki S. Bhadury ; Bin Liu ; De-Yu Hu and Weiming Xu
- 关键词：Gas chromatography ; Derivatization ; 2 ; Methyl ; 4 ; chlorophenoxyacetic acid in soil
- 刊名：Chromatographia
- 出版时间：November 2010
- 出版年：2010
- 期刊代码：19_0009-5893
- 类别：ph
- 卷：72
- 期：9-10
- 页码：933-939
- 数据来源：sp
摘要
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 μg 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.