固废浸出液中苯系物的测定方法研究

建立以纯水为萃取剂，按液固比10：1（L／kg）零顶空震荡萃取固废样品（18±2）h，顶空进样一气相色谱法分析浸出液中的7种苯系物方法。考察不同氯化钠含量、不同顶空条件（炉温、恒温时间、循环时间）对苯系物响应值的影响；考察方法的线性范围、相关性、精密度及检出限；建立标准曲线。结果显示：7种苯系物分离良好，线性范围均在O．30～47．0μg／L间，相关系数均大于0．999，方法检出限0．14-0．39μg／L，方法回收率81．2％-96．8％，相对标准偏差（RSD，n=7）小于9．8％；用本方法测定生活污水固废及铜矿土壤固废样品，回收率64．5％～80．6％，相对标准偏差（RSD，n=3）小于11％。

Determination of the Benzene Series in Solid Waste Leaching

Pure water as extraction agent, 10：1 （L/kg） as liquid- solid ratio, oscillating and extracting the solid waste samples for 18 ＋ 2 hours by zero headspace extraction apparatus,To Establish the method of determination of seven kinds of BTEX in the leaching solution by headspace - gas chromatography. Investigating the effect of NaCI and headspace conditions, including temperature, constant temperature time and cycle time, on response value, investigating the linear range, correlation, precision and detection limit, and establishing standard curve, the results showed that 7 kinds of benzene compounds had good separation, the linear range was 0.30 - 47.0 μg/L, correlation coefficient was greater than 0.999, the detection limit was 0.14 -0.39 μg/L, the recovery rate was 81.2% -96.8% and the relative standard deviation （ RSD ,n =7） was less than 9.8%. Analysing the samples of sewage solid and copper mine soil waste by this method, the results showed that the recovery rate was 64.5% - 80.6% and the relative standard deviation （ RSD, n = 3 ） was less than 11% .