摘要
为了控制液相色谱法测定地下水多环芳烃（PAHs）的准确度，定量研究了氮吹浓缩系统引起的空白污染，提出了空白污染的解决办法，验证了该方法的准确度。结果表明：氮吹浓缩系统会引入萘、苊、芴、菲、蒽5种PAHs污染；不同厂家的氮气对空白污染的影响不同，相同厂家不同级别的氮气对空白影响差别不大；不同的氮吹仪也会对空白产生影响，自制玻璃管氮吹系统对空白污染较小；采用椰壳活性炭吸附净化的办法可以有效去除空白的PAHs污染；PAHs的方法检出限为0.001-0.01 μg/L，基质加标回收率为83.3%-98.3%，该方法的线性良好，准确度高。
The present paper is inclined to present our research finding on how to guarantee the accuracy of PAHs in the groundwater with the liquid-liquid extraction of HPLC. To reduce the blank pollution of PAHs and ensure the detection accuracy of the blank pollutants, we have made both quantitative and qualitative analysis of the pollution situation of naphthalene, acenaphthene, fluorine, phenanthrene and anthracene in the presence of the blank pollutants after pre-treating the blank samples in the analysis of PAHs in the groundwater by HPLC. In this paper, we have also analyzed the blank pollution caused by the nitrogen condensation system, proposed a solution to the blank pollution problem, and verified the accuracy of the analysis method. The results of our study demonstrate that the nitrogen and nitrogen blowing concentrator are the main sources of the blank pollution in the nitrogen condensation system, in which there exist pollutants of naphthalene, acenaphthene, fluorine, phenanthrene and anthracene in the blank after the pre-treatment of the blank samples by the liquid-liquid extraction in the entire processing procedure. What is more, the content of naphthalene in the pollution has been worked out up to 413.78 ng/L, far higher than China＇s national standard for the groundwater quality. What is more, nitrogen from different manufactures is also considered to have various effects on the blank, with the blank pollution caused by nitrogen A being much more serious than that by nitrogen B, though no serious effect has been found by nitrogen at different levels from the same manufacturer. Nevertheless, both nitrogen B1 and nitrogen B2 have less serious effect on the blank pollution. The nitrogen blowing concentrator from different manufactures has different effects on the blank pollution. Concentrator D is much serious than that by nitrogen blowing concentrator C, which mainly comes from the organic pipelines made from it. However, hardly any pollution has been brought about by the home-made glass tube made of nitr
出处
《安全与环境学报》
CAS
CSCD
北大核心
2014年第3期312-316,共5页
Journal of Safety and Environment
基金
国土资源部公益性行业科研专项(201011029-2)
