快速声表面波气相色谱技术检测水中苯系物*

建立了便携式声表面波气相色谱快速检测水中苯系物的方法。实验条件:检测器温度25℃,DB-5毛细管色谱柱:初始温度40℃,10℃/s程序升温至180℃。结果表明,氯苯、间二甲苯、苯乙烯、异丙苯保留时间分别为1.72 s、1.86 s、2.00 s、2.22 s,检出限分别为1.34μg/L、0.55μg/L、0.50μg/L、0.39μg/L,测得相对标准偏差值为4.08%~5.98%,回收率为82.7%~103.8%,且线性良好,线性相关系数为0.9946~0.9993。因此,该方法适用于水中苯系物的快速应急监测。

Determination of benzene series in water by using the fast SAW gas chromatograph

A method of benzene series rapid detection has been developed using gas chromatography with surface acoustic wave detector(GC-SAW).Benzene series was tested by headspace under this condition.The SAW detector temperature was set at 25℃.The initial temperature of DB-5 capillary column was 40℃,and was temperature-programmed to 180℃ with the rate of 10℃/s.The results show that the retention times of chlorobenzene,m-xylene,styrene and cumene were 1.72 s,1.86 s,2.00 s,2.22 s respectively,the detection limits were 1.34μg/L,0.55 g/L,0.50μg/L,0.39μg/L respectively,and the relative standard deviations were in 4.08%–5.98%.The recoveries were 82.7%–103.8%,and the linearities were good,linear correlation coefficients were 0.9946–0.9993.Therefore,this method is suitable for benzene series rapidly emergency monitoring in water.