Department of Chemistry, College of Science, Hebei Agricultural University, Baoding, P.R. China.
College of Science & Technology, Hebei Agricultural University, Cangzhou, P.R. China.
J Sep Sci. 2020 Jul;43(13):2594-2601. doi: 10.1002/jssc.201901294. Epub 2020 May 18.
A solid-phase microextraction with carbon nanospheres coated fiber coupled with gas chromatographic detection was established for the determination of eight polycyclic aromatic hydrocarbons (naphthalene, biphenyl, acenaphthene, fluorine, phenanthrene, anthracene, fluoranthene, and pyrene) in water and soil samples. The experimental parameters (extraction temperature, extraction time, stirring rate, headspace volume, salt content, and desorption temperature) which affect the extraction efficiency were studied. Under the optimized conditions, good linearity between the peak areas and the concentrations of the analytes was achieved in the concentration range of 0.5-300 ng/mL for water samples, and in the concentration range of 6.0-2700 ng/g for soil samples. The detection limits for the analytes were in the range of 0.12-0.45 ng/mL for water samples, and in the range of 1.53-2.70 ng/g for soil samples. The method recoveries of the polycyclic aromatic hydrocarbons for spiked water samples were 80.10-120.1% with relative standard deviations less than 13.9%. The method recoveries of the analytes for spiked soil samples were 80.40-119.6% with relative standard deviations less than 14.4%. The fiber was reused over 100 times without a significant loss of extraction efficiency.
采用碳纳米球涂层纤维固相微萃取与气相色谱检测联用的方法，建立了水中和土壤中 8 种多环芳烃（萘、联苯、苊、芴、菲、蒽、荧蒽和芘）的测定方法。研究了影响萃取效率的实验参数（萃取温度、萃取时间、搅拌速率、顶空体积、盐含量和解析温度）。在优化条件下，水样中分析物的浓度在 0.5-300ng/mL 范围内、土壤样中在 6.0-2700ng/g 范围内，峰面积与浓度呈良好的线性关系。分析物的检出限为水样 0.12-0.45ng/mL，土壤样 1.53-2.70ng/g。水中多环芳烃的加标回收率为 80.10-120.1%，相对标准偏差小于 13.9%。土壤中分析物的加标回收率为 80.40-119.6%，相对标准偏差小于 14.4%。该纤维重复使用 100 多次，萃取效率无明显损失。
