【摘要】 空气中二氧化硫是环境监测必测项目之一,常用的方法是HJ482-2009甲醛吸收—副玫瑰苯胺光度法,该方法灵敏度高,选择性好,但是对实验测定要求比较高。本文通过多次实验分析,结合工作经验,对其测定结果的影响因素加以总结,对该标准方法进行补充和细化,提出整个测定过程中的注意事项,旨在提高实验过程中二氧化硫测定的准确度,可为SO₂浓度连续监测技术的推广和应用提供参考。更多还原

【Abstract】 Sulfur dioxide in air is one of the necessary items for environmental monitoring. The commonly used method is HJ482-2009 formaldehyde absorption-pararosaniline spectrophotometry. This method has high sensitivity and selectivity, but requires high experimental determination. This paper summarized the influencing factors of the determination results through many experiments and analysis, combined with the work experience, supplemented and refined the standard method, and put forward the matters needing attention in the whole determination process, in order to improve the accuracy of the determination of sulfur dioxide in the experiment process. It can provide reference for the popularization and application of continuous monitoring technology of SO₂ concentration.It can provide reference for the popularization and application of continuous monitoring technology of SO₂ concentration.更多还原