- 作者: 蔡惠玲、翁義綱、何武雄
- 作者服務機構: Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, R.O.C.
- 中文摘要: The solid-phase microextraction (SPME) technique using a 100 mm film poly(dimethylsiloxane) (PDMS) has been examined with the aim to determine butachlor in aqueous samples. The feasibility of SPME gas chromatography-electron capture detection (GC-ECD) analysis has been evaluated. From this study the equilibrium distribution constant between PDMS coating and water for butachlor obtained was 1.9 ’ 103 with a 5.3% RSD. Extraction time of 40 min, desorption time of 3 min and desorption temperature of 250 °C were selected. The effect of salt addition was examined. The inhibitions of methanol and humic acid to the extraction of butachlor were observed. A standard addition method for calibration was recommended to reduce the deviation from matrix interference. Linear ranges from 0.1 to 12 mg/L and limits of detection of 0.007 mg/L for deionized water, 0.010 mg/L for ground water, and 0.016 mg/L for irrigated water were obtained. The proposed method was applied to determine butachlor in irrigated water. The degradation of butachlor in aqueous solution under the irradiation of 253.7 nm light has been measured by the developed SPME-GC-ECD procedure. The half-life of the aqueous butachlor found was 208 seconds.
- 英文摘要: --
- 中文關鍵字: Butachlor; Water analysis; Solid-phase microextraction; GC-ECD.
- 英文關鍵字: --