摘要
对吹地表水中5 种硝基苯类化合物进行吹扫捕集富集,解吸后用气相色谱-质谱联用法同时测定,内标法定量,加入硫酸钠提高方法的灵敏度,优化并验证检测方法.实验结果表明,使用TeKmer-Dohrmann 3100 型吹扫捕集仪,在吹扫温度为45℃、吹扫14 min 的条件下测定水质中5 种硝基苯类化合物,在0～60 μg/L 范围内线性关系良好,检出限为0.03～0.05 μg/L,加标回收率为91.7%～95.9%,测定结果的相对标准偏差为1.00%-1.84%（n=7）.该方法操作简便、准确度高、重现性好,能够满足地表水中5 种硝基苯类化合物的同时测定.
After being enriched by purge and trap, five kinds of nitrobenzene compoundsin in surface water were determined by gas chromatography–mass spectrometry at the same time with quantification by internal standardmethod. The sensitivity of the test methods was developed by adding sodium sulfate, and the test method was optimized and verified. Experimental results showed that using purge and trap TeKmer Dohrmann–3100 type instrument, at the scavenging temperature of 45℃, purging 14 min, five kinds of nitrobenzene compounds in water had good linearity in the range of 0–60μg/L, the detection limits were 0.03–0.05μg/L, and the standard addition recoveries were 91.7%–95.9% with RSDs of 1.00%–1.84%(n=7). This method is simple to operate, and it has high accuracy, good reproducibility. The method can meet the needs of simultaneous determination of five kinds of nitrobenzene compounds in surface water.
出处
《化学分析计量》
CAS
2016年第2期75-77,共3页
Chemical Analysis And Meterage
关键词
吹扫捕集
地表水
硝基苯类
气相色谱质谱联用法
purge and trap
surface water
nitrobenzene class
gas chromatography–mass spectrometry
