摘要
研究发现 ,在盐酸介质中 ,痕量邻二硝基苯能灵敏地阻抑高碘酸钾氧化中性红褪色。中红性、盐酸、高碘酸钾的最佳用量分别为 0 5 5 ,0 6 0 ,0 6 0mL ,反应温度 80℃ ,反应时间 6min。研究了该阻抑褪色反应的最佳条件及动力学参数 ,建立了一种测定痕量邻二硝基苯的新方法。该法测定线性范围为0 0～ 4.0 μg/L ,检测限为 7.7× 10 -7g/L。用于环境水样中邻二硝基苯的测定 ,结果满意。
In HCl medium, trace o-dinitrobenzene can sensitively inhibit the discoloration reaction of neutral red oxidized by KIO4. The optimum neagent is 0.55 mL neutral red, 0.60 mL HCl, 0.6 mL KIO4, respectively. The neaction temperature is 80 degreesC, neaction time is 6 min. The optimum condition and kinetic parameters are investigated in detail,a new method for determination of trace o-dinitrobenzene is proposed. The detection limit is 7.7 x 10(-7) g/L and the linear range is 0.0 similar to 4.0 mug/L o-dinitrobenzene. It has been applied to the determination of trace o-dinitrobenzene in environmental water sample with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2001年第3期258-261,共4页
Chinese Journal of Analytical Chemistry
基金
江西省自然科学基金!资助课题 (No .Z0 14 2 4)
