| 固体废弃物浸出液中酞酸酯的测定 |
| 摘要点击 1397 全文点击 1675 修订日期：1993-10-28 |
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| 中文关键词 酞酸酯 固体废弃物 浸出液 高效液相色谱 |
| 英文关键词 phthalic esters extracts HPLC |
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| 中文摘要 |
| 报道高效液相色谱测定固体废弃物浸出液中酞酸酯的方法。实验建立了Zorbax-CN柱和含0.1%异丙醇的正己烷为洗脱液,在224nm处紫外检测的液相色谱系统,并应用该系统测定了北京市城市垃圾浸出液中的酞酸酯。该系统可有效地分离漫出液中非极性有机物和酞酸酯组分,并有效地避开了一部分与酞酸酯极性相近的有机物的干扰。浸出液经正己烷萃取、浓缩后,不需净化(如柱层析)即可直接进入液相色谱系统进行分析。5种酞酸酯的检出限为0.2-1.0ng,浸出液定量分析线性范围为0.1-9-450×10-9,回收率为70%-110%,垃圾浸出液7次平行测试的变异系数在10%以内。 |
| 英文摘要 |
| The HPLC determination of phthalic esters in aqueous extracts from solid wastes were reported.In this study,a HPLC system equipped with a Zorbax-CN column and a 224 nm UV detector and using a n-hexane mixed with 0.1% isopropanol as eluting agent was established and used to determine the phthalic esters in aqueous extracts from municipal refuses in Beijing.The system was effective to separate phthalic esters from non-polar organics in the extracts and to eliminate the interference likely resulted from some organic compounds which had a polarity similar to phthalic esters. Having been extracted with n-hexane and then concentrated,the extracts in organic phase could be directly analysed with the HPLC system without a further purification (e. g., column chromatography).Water samples fortified with phthalic esters at a level in the range of 1-500 ppb were analysed,with a linear response in the range of 0.1-450 ppb, a recovery for phthalic esters of 70 %-110%,and the detectable limits of 1.0 ng for dimethyl phthalate (DMP),0.4 ng for diethyl phthalate(DEP),and 0.2 ng for each of di-n-butyl phthalate(DBP),di-n-octyl phthalate (DOP) and di (2-ethylhexyl) phthalate (DEHP), at 224 nm.The phthalic esters in aqueous extracts from several solid waste samples were found by using this system to be at a level of 5 ppb. The variation coefficient for 7 parallel tests on the extracts from solid wastes was within 10%. |
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