加速溶剂萃取-气相色谱法测定沉积物中正构烷烃的含量

Lei SHI,Xiao-hu CAI,Ai-juan L(U),Xiao-ming SHEN,Jing-ke HU,Jia-lin SHEN

Physical Testing and Chemical Analysis Part B:Chemical Analysis（2017）

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Abstract

样品引入加速溶剂萃取池中,以丙酮-二氯甲烷(1+1)混合液为提取剂,在120℃下进行静态提取10 min.提取液用装有硅胶和中性氧化铝的柱子进行净化,以正己烷-丙酮(9+1)混合液为淋洗液.洗脱液采用气相色谱法进行分离,外标法定量.各化合物的质量浓度在一定范围内呈线性,检出限(3S/N)在0.02～0.17 mg·L-1之间.按标准加入法在3个浓度水平上进行回收试验,回收率在72.1％～91.7％之间,测定值的相对标准偏差(n=6)在1.8％～16％之间.

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