title: [Determination of inorganic ions in explosive residues by capillary zone electrophoresis].
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 electroosmotic 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.
authors.affiliation: Department of Chemistry, Capital Normal University, Beijing 100037, China. fengjunhecranr@163.com
authors.forename: Junhe
authors.initials: J
authors.lastname: Feng
authors.forename: Baoyuan
authors.initials: B
authors.lastname: Guo
authors.forename: Jin-Ming
authors.initials: JM
authors.lastname: Lin
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Zhou
authors.forename: Yuyou
authors.initials: Y
authors.lastname: Sun
authors.forename: Yao
authors.initials: Y
authors.lastname: Liu
authors.forename: Yangke
authors.initials: Y
authors.lastname: Quan
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Lu
mesh_terms: D002021:Buffers; D019075:Electrophoresis, Capillary / Q000379:methods*; D053834:Explosive Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007287:Inorganic Chemicals / Q000032:analysis* / Q000302:isolation & purification; D013997:Time Factors
chemical_list: D002021:Buffers; D053834:Explosive Agents; D007287:Inorganic Chemicals