流动注射化学发光法检测卷烟主流烟气中的氮氧化物

[目的]探讨一种流动注射化学发光法间接测定卷烟主流烟气中氮氧化物（NOx）的方法。[方法]将NOx用氢氧化钠（NaOH）溶液吸收定量生成亚硝酸根（NO2-），在酸性条件下与过氧化氢（H2O2）反应，其产物与鲁米诺发生很强的化学发光反应，用流动注射化学发光分析仪根据化学发光强度测定卷烟主流烟气中的NO。含量。[结果]建立了一种新的卷烟主流烟气中的NOx鲁米诺一过氧化氢化学发光分析体系：H2O2浓度1．0×10^-3g/ml，硫酸浓度0．01mol／L，氢氧化钠浓度0．10mol／L溶液配制发光液，鲁米诺浓度为1．0×10^-3mol/L。方法的检出限为1．2×10^-5g/L，相对标准偏差〈3．00％。样品分析结果表明，烤烟型卷烟NOx含量普遍较混合型低，与烤烟型卷烟舍亚硝酸盐较低的规律比较吻合。[结论]流动注射化学发光法适用于卷烟主流烟气中的NOx的定量分析。

Determination of Nitrogen Oxides in Mainstream Cigarette Smoke by Flow Injection Chemiluminescence Analysis

[Objective] The technique of the indirect measurement of the nitrogen oxides(NOx) in the mainstream of cigarette smoking with the method of flow injection chemiluminescence was investigated.[Method] Firstly,the NOx was reacted with NaOH for the quantitative formation nitrite(NO2-),which was reacted with hydrogen peroxide(H2O2) in acidic condition and then the product from the reaction could act with Luminol to generate strong chemiluminescence signal.Finally,the content of the NOx in the mainstream of cigar...