环境监控与预警
環境鑑控與預警
배경감공여예경
ENVIRONMENTAL MONITORING AND FOREWARNING
2015年
3期
31-34
,共4页
半挥发性有机物%应急监测%水样%预处理方法
半揮髮性有機物%應急鑑測%水樣%預處理方法
반휘발성유궤물%응급감측%수양%예처리방법
Semi-volatile organic compounds%Emergency monitoring%Water sample%Pretreatment method
通过配制标准水样，对比液液小体积萃取法、分散液液微萃取法和固相微萃取法结合便携式气质联用仪三种预处理方法的萃取效率。结果表明，在最佳的萃取条件下，三种预处理方法对标准水样的富集效率均较高。在5～50μg ／L 范围内，14种 SVOC 线性良好，检出限为0．1～3．5μg ／L，其中固相微萃取法萃取效率最高，但对酞酸酯类化合物选择性较差。分散液液微萃取法对有机磷类物质选择性较高，而液液小体积萃取法对大部分的半挥发性有机物没有特别的选择性。在进行实际水样测定时，三种方法在灵敏度、精密性和抗干扰能力等方面均满足水环境污染事故的应急监测要求。
通過配製標準水樣，對比液液小體積萃取法、分散液液微萃取法和固相微萃取法結閤便攜式氣質聯用儀三種預處理方法的萃取效率。結果錶明，在最佳的萃取條件下，三種預處理方法對標準水樣的富集效率均較高。在5～50μg ／L 範圍內，14種 SVOC 線性良好，檢齣限為0．1～3．5μg ／L，其中固相微萃取法萃取效率最高，但對酞痠酯類化閤物選擇性較差。分散液液微萃取法對有機燐類物質選擇性較高，而液液小體積萃取法對大部分的半揮髮性有機物沒有特彆的選擇性。在進行實際水樣測定時，三種方法在靈敏度、精密性和抗榦擾能力等方麵均滿足水環境汙染事故的應急鑑測要求。
통과배제표준수양，대비액액소체적췌취법、분산액액미췌취법화고상미췌취법결합편휴식기질련용의삼충예처리방법적췌취효솔。결과표명，재최가적췌취조건하，삼충예처리방법대표준수양적부집효솔균교고。재5～50μg ／L 범위내，14충 SVOC 선성량호，검출한위0．1～3．5μg ／L，기중고상미췌취법췌취효솔최고，단대태산지류화합물선택성교차。분산액액미췌취법대유궤린류물질선택성교고，이액액소체적췌취법대대부분적반휘발성유궤물몰유특별적선택성。재진행실제수양측정시，삼충방법재령민도、정밀성화항간우능력등방면균만족수배경오염사고적응급감측요구。
Small volume liquid-liquid extraction,dispersive liquid-liquid microextraction and solid-phase microextraction coupled with portable GC-MS were developed for the determination of representative semi-volatile organic compounds(SVOC).By confecting standard water samples,we compared the extraction efficiency of the three methods.The results showed that on the optimum extrac-tion conditions,three pretreatment methods could all get satisfactory results.Linearity was obtained in the range of 5 ~50 μg /L.The detection limits of 14 SVOC were in the range of 0.1 ~3.5 μg /L.The extraction efficiency of solid-phase microextraction was the highest except for phthalic acid esters,while dispersive liquid-liquid microextraction was better for organophosphorus.Compared with the other two methods there was no particular selectivity for small volume liquid-liquid extraction.When we determined the actual water samples,we could obtain different sensitivities,precision and anti-interference abilities.But all of them could meet the require-ments of emergency monitoring in the water environmental pollution accidents.
