气相色谱法测定工作场所空气中氯萘  

GC determination for chloronaphthalene desorbed by solvent in workplace air

作　　者：李晔[1] 

机构地区：[1]北京市宣武区疾病预防控制中心,北京100053

出　　处：《中国卫生检验杂志》2007年第1期94-95,143,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立用硅胶管采集工作场所空气中氯萘的毛细管气相色谱分析方法。方法：硅胶管吸附空气中氯萘，样品经正己烷解吸，气相色谱检测。结果：当空气中氯萘浓度范围在0．33～6．67mg／m^3（参照国标PC-TWA0．5mg／m^3）时，相关系数r〉0．999，检出限0．3μg／ml，以采集7．5L空气样品计，最低检出浓度0．04mg／m^3。平均解吸效率90％，硅胶吸附10．0μg氯萘，样品放置7d后，回收率仍达90％。在本实验条件下与萘等化合物有较好的分离。结论：本方法可用于工作场所空气中氯萘的检测。Objective：To establish a gas chromatographic （GC） analytical method for chloronaphthalene in the workplace using silica gel tube for sampling. Methods： Silica gel was used to absorb chloronaphthalene, sample was desorpted by n - hexane and analyzed by GC. Results： When the concentration of chloronaphthalene was in the range of 0. 33 - 6. 67 mg/m^3, r 〉 0. 999. Determination limit was 0. 3 μg/ml. The lowest determinable concertration was 0. 04 mg/m3 when 7. 5 liter workplace air sample was colleceted. Desorption efficiency was 90%. After taking 10. 0 μg of chloronaphthalene by silica gel tube 7 days ,recovery efficiency was 90%. Chloronaphthalene was separated from naphthalene under this experimental condition. Conclusion：This method can be used to determine the concentration of chloronaphthalene in the workplace air.

关 键 词：氯萘 硅胶管 溶剂解吸 石英毛细管柱 气相色谱 

分 类 号：O557.71[理学—热学与物质分子运动论]