摘要
目前,生态环境监测部门对固定污染源废气中的SO2较多采用定电位电解法来进行测定。该方法简单快捷,仪器便携,但其准确性却受到诸多因素的影响。通过对定电位电解法和甲醛缓冲溶液吸收——盐酸副玫瑰苯胺分光光度法测定固定污染源废气中SO2的结果进行比较和分析,对使用过程中应该注意的环节进行探讨。比较分析结果表明,分光光度法需注意采样系统和装置气密性、现场采样流量、现场空白测定、分析干扰排除、尽快分析和必要时样品冷藏保存。定电位电解法需注意仪器设备养护、监测点位选择、气密性、采样流量、干扰预防和排除(高湿、静电、较强的电场或磁场等)。
Now the department of ecology environment usually tests SO2 in Stationary source waste gas with fixed potential by electrolysis method.It’s simple,quickly and convenient,but easy to be impacted by many factors.Through compared and analyzed about determination of SO2 in stationary source waste gas by fixed potential by electrolysis method&formaldehyde absorbing-Pararosaniline hydrochloride spectrophotometry,research matters needing attention during testing.Results of comparison and analysis showed that formaldehyde absorbing-Pararosaniline hydrochloride spectrophotometry should pay attention to air tightness of testing system and equipment、scene rate of testing flow、scene blank determination、analysis interference elimination、analyse immediately、cold storage the sample when necessary.Fixed potential by electrolysis method should take note of equipment maintenance、Select the appropriate monitoring point、air tightness、scene rate of testing flow、interference prevention and ruled out(eg:high humidity、electrostatic、strong electric or magnetic field etc).
作者
李冬林
Li Donglin(Comprehensive Group,The monitoring Center for Ecology Environment of Yichang,Department of Ecology Environment of Hubei Province,Yichang 443100,China)
出处
《广东化工》
CAS
2020年第21期131-133,共3页
Guangdong Chemical Industry
