气相分子吸收光谱法测定固定污染源废气中的氨  

Determination of Ammonia in Exhaust Gas from Stationary Source by GPMAS

作　　者：孙硕 SUN Shuo(Binzhou Ecological Environment Monitoring Center of Shandong Province,Binzhou 256600,China)

机构地区：[1]山东省滨州生态环境监测中心,山东滨州256600

出　　处：《山东化工》2025年第1期160-161,165,共3页Shandong Chemical Industry

摘　　要：建立了气相分子吸收光谱法测定固定污染源废气中氨含量的方法。实验结果表明,氨质量浓度在0~2 mg/L范围内与吸光度线性关系良好,相关系数为0.999 9,方法检出限为0.1μg/10 mL,通过测定标准样品及对实际样品进行加标回收试验,实验结果的相对标准偏差RSD为1.3%~1.4%,相对误差为-0.4%~0.7%,加标回收率为97.8%~99.0%。与国家标准方法比较,该方法测定结果没有显著性差异。该方法无需进行前处理,不使用剧毒试剂,抗干扰能力强,能够准确检测固定污染源废气中氨的含量,适用于大批量实际样品分析。A method for determining ammonia content in exhaust gas from stationary source using gas-phase molecular absorption spectroscopy was established.The experimental results showed that there was a good linear relationship between ammonia concentration and absorbance within the range of 0~2 mg/L,with a correlation coefficient of 0.9999.The detection limit of the method was 0.1μg/10 mL.By measuring the standard sample and conducting spiked recovery tests on the actual sample,the relative standard deviation RSD of the experimental results was 1.3%~1.4%,the relative error was-0.4%~0.7%,and the spiked recovery rate was 97.8%~99.0%.Compared with the national standard method,there is no significant difference in the results obtained by this method.This method does not require pre-treatment,does not use highly toxic reagents,has strong anti-interference ability,and can accurately detect the content of ammonia in fixed pollution source exhaust gas.It is suitable for large-scale practical sample analysis.

关 键 词：气相分子吸收光谱法 固定污染源废气 氨 

分 类 号：O657.31[理学—分析化学] X831[理学—化学]