| 摘要: |
| 针对不同来源、不同浓度水平的气体氨样品，分别用流动注射-水杨酸分光光度法和纳氏试剂分光光度法开展相关实验。实验结果表明，采用流动注射-水杨酸分光光度法测定空气中的氨，其质量浓度在0～4.00mg/L范围内与吸光度有良好线性关系，相关系数大于0.999，其平行样的相对偏差、曲线标准浓度点的相对误差均小于5%，样品平均加标回收率为98.8%～101%，质控样浓度在不确定度范围内。与纳氏试剂分光光度法相比，流动注射-水杨酸分光光度法在抗干扰、分析耗时、数据处理、样品复测和环境保护方面具备一定的优势，在经济性和人机工程学方面，流动注射-水杨酸分光光度法也比纳氏试剂分光光度法更具经济效益，人机工效也更加合理。由此可见，流动注射-水杨酸分光光度法用于测定环境空气和废气中的氨实样检测和质控均能满足标准要求，分析能耗低、效率高，自动化流程满足人机工程学要求，符合环境保护和保障人体健康的原则，经济效益更合理，可以作为一种新的方法用于大批量环境空气和废气中氨样品的分析测试。 |
| 关键词: 流动注射-水杨酸分光光度法 纳氏试剂分光光度法 氨 可行性 |
| DOI： |
| 分类号:X831 |
| 基金项目:苏州市关键核心技术攻关项目 |
|
| Study on the Determination of Ammonia in Air and Waste Gas by Flow Injection Method |
|
GE Xiaofan, YAN Xing
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| Abstract: |
| Conduct relevant experiments using flow injection salicylic acid spectrophotometry and Nessler's reagent spectrophotometry for gas ammonia samples from different sources and concentration levels. The experimental results showed that the mass concentration of ammonia in air determined by flow injection salicylic acid spectrophotometry had a good linear relationship with absorbance in the range of 0-4.00mg/L, with a correlation coefficient greater than 0.999. The relative deviation of parallel samples and the relative error of the standard concentration point of the curve were both less than 5%. The average recovery rate of the sample spiked was 98.8% -101%, and the concentration of the quality control sample was within the uncertainty range. Compared with Nessler's reagent spectrophotometry, flow injection salicylic acid spectrophotometry has certain advantages in anti-interference, time-consuming analysis, data processing, sample retesting, and environmental protection. In terms of economy and ergonomics, flow injection salicylic acid spectrophotometry is also more cost-effective and has more reasonable ergonomics. From this, it can be seen that the flow injection salicylic acid spectrophotometric method can meet the standard requirements for the detection and quality control of ammonia samples in ambient air and exhaust gas, with low energy consumption and high efficiency. The automated process meets the requirements of ergonomics, conforms to the principles of environmental protection and human health protection, and has more reasonable economic benefits. It can be used as a new method for the analysis and testing of ammonia samples in large quantities of ambient air and exhaust gas. |
| Key words: Flow injection salicylic acid spectrophotometric method Nessler"s reagent spectrophotometry ammonia feasibility |
