气相分子吸收光谱法测定无组织排放废气中的氨含量  

Determination of ammonia content in unorganized exhaust gas by gas phase molecular absorption spectrometry

作　　者：孙硕 宋海梅 乔燕 SUN Shuo;SONG Hai-Mei;QIAO Yan(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,滨州256600

出　　处：《实验室检测》2024年第10期168-170,共3页Laboratory Testing

摘　　要：目的探讨采用气相分子吸收光谱法测定无组织排放废气中氨含量的方法。方法从检出限、校准曲线、精密度与正确度等方面探讨该检测方法,并与国标方法进行比对。结果氨质量浓度在0~2 mg/L范围内与吸光度线性关系良好,相关系数为0.9999,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0.3%~1.5%,相对误差为-0.1%~0.6%,加标回收率为97.1%~99.5%。与国家标准方法比较,该方法测定结果没有显著性差异。结论该方法无需进行前处理,不使用剧毒试剂,抗干扰能力强,检测结果准确度高,精密度好,适用于测定无组织排放样品中氨的含量。Objective Explore the method of using gas-phase molecular absorption spectroscopy to determine the ammonia content in unorganized exhaust gas emissions.Methods Explore the detection method from the aspects of detection limit,calibration curve,precision and accuracy,and compare it with the national standard method.Results 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 0.3%~1.5%,the relative error was-0.1%~0.6%,and the spiked recovery rate was 97.1%~99.5%.Compared with the national standard method,there is no significant difference in the results obtained by this method.Conclusion 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 the unorganized discharge sample.Suitable for determining the ammonia content in unorganized emission samples.

关 键 词：气相分子吸收光谱法 无组织排放 氨 

分 类 号：O657.3[理学—分析化学] X831[理学—化学]