顶空固相微萃取气相色谱法测定水中多种增塑剂

Determination of plasticizers in water by headspace solid-phase microextraction coupled with gas chromatogrphy

采用顶空固相微萃取气相色谱法测定了水中多种增塑剂,并考察了盐效应、萃取温度、萃取时间、热解吸时间等因素对方法灵敏度的影响,该方法的线性范围为2～1000μg/L,检出限为0.06～5.5μg/L,回收率为94.55～105.76%,RSD＜4%.

Headspace solid - phase microextraction coupled with gas chromatography have been applied for the quantitative determination of plasticizers in water. The influence of the operating conditions such as extraction temperature, extraction time, desorption time, salt effect and chromatography condition aere studied. The reproducibility of the technique was less than 4% （RSD） for all plasticizers determined. Linearity extends in the range of 2-1000μg/L. The detection limit is 0.06-5.5μg/L and the recovery ranges from 94.55% to 105.76%.