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
孙硕 1宋海梅 1乔燕1
作者信息
- 1. 山东省滨州生态环境监测中心,滨州 256600
- 折叠
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0.1 μg/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.
Abstract
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 0.1 μg/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Key words
gas-phase molecular absorption spectrometry/ugitive emission/ammonia引用本文复制引用
出版年
2024
NETL
NSTL
万方数据