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毛细管区带电泳技术快速分离检测爆炸残留物中的无机离子

冯俊鹤1,2,郭宝元3,林金明2 ,徐建中4,周红4,孙玉友4,刘耀4,权养科4,鲁晓明1   

  1. 1.Department of Chemistry, Capital Normal University, Beijing 100037, China; 2.Key Laboratory of Bioorganic Phosphorus Chemistry &Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China; 3.State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, China; 4.Institute of Forensic Science, Ministry of Public Security, Beijing 100038, China
  • 收稿日期:2008-08-18 修回日期:2008-10-18 出版日期:2008-11-30 发布日期:1983-06-25
  • 通讯作者: 林金明；郭宝元
  • 基金资助:
    :国家重点基础研究发展计划(“973”计划)项目(No. 2007CB714507)和教育部高等学校博士点基金项目(No. 20070003026).

Determination of inorganic ions in explosive residues by capillary zone electrophoresis

FENG Junhe1,2, GUO Baoyuan3, LIN Jin-Ming2, XU Jianzhong4, ZHOU Hong4, SUN Yuyou4, LIU Yao4, QUAN Yangke4, LU Xiaoming1   

  1. 1.Department of Chemistry, Capital Normal University, Beijing 100037, China; 2.Key Laboratory of Bioorganic Phosphorus Chemistry &Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China; 3.State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, China; 4.Institute of Forensic Science, Ministry of Public Security, Beijing 100038, China
  • Received:2008-08-18 Revised:2008-10-18 Online:2008-11-30 Published:1983-06-25
  • Contact: LIN Jin-Ming；GUO Baoyuan

PDF

738

被引次数

24

摘要： 利用间接紫外毛细管区带电泳方法完成了对爆炸残留物中7种无机离子(K+,NH+4,NO-2,NO-3,SO2-4,ClO-3,ClO-4)的分离检测。阳离子测定采用的缓冲体系为10 mmol/L吡啶（pH 4.5）-3 mmol/L冠醚，K+和NH+4在2.6 min内达到基线分离,检出限分别为0.25 mg/L和0.10 mg/L(S/N=3)。阴离子测定采用的缓冲体系为40 mmol/L硼酸-1.8 mmol/L重铬酸钾-2 mmol/L硼酸钠（pH 8.6）,氢氧化四甲铵为电渗流改性剂，5种阴离子在4.6 min内达到基线分离,检出限为0.10～1.85 mg/L。该方法已成功地应用于实际爆炸物样品种类的判定分析,取得了很好的结果。

关键词: 爆炸残留物 , 间接紫外检测, 毛细管区带电泳, 无机离子

Abstract: Five anions (chlorate, perchlorate, nitrate, nitrite, and sulfate) and two cations (ammonium and potassium) in explosive residues have been separated and determined by capillary zone electrophoresis （CZE） with indirect ultraviolet detection. The electrolyte buffer for the cation separation was 10 mmol/L pyridine （pH 4.5）-3 mmol/L 18-crown-6-ether. Ammonium and potassium ions were baseline separated in less than 2.6 min with the detection limits of 0.10 mg/L and 0.25 mg/L (S/N=3), respectively. The electrolyte buffer for the anion separation consisted of 40 mmol/L boric acid-1.8 mmol/L potassium dichromate-2 mmol/L sodium tetraborate （pH 8.6）, and tetramethyl ammonium hydroxide (TMAOH) was used as electro-osmotic flow modifier. All five anions were well separated in less than 4.6 min with the detection limit range of 0.10-1.85 mg/L (S/N=3). The method was successfully used in real sample investigations to confirm the type of explosives.

Key words: explosive residues , indirect ultraviolet detection, inorganic ions, capillary zone electrophoresis （CZE）