引用本文:宋祖华.固定污染源废气中三氧化硫测试方法初探[J].环境监控与预警,2019,11(2):34-37
SONG Zu hua.Determination of SO3 in Stationary Pollution Source[J].Environmental Monitoring and Forewarning,2019,11(2):34-37
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固定污染源废气中三氧化硫测试方法初探
宋祖华
作者单位
宋祖华 江苏省南京环境监测中心江苏 南京 210013 
摘要:
建立了异丙醇吸收-分光光度法测试固定污染源中三氧化硫(SO<sub>3</sub>)的方法,分别连续9次测试低、中、高3个质量浓度的SO<sub>3</sub>烟气。测试结果表明,相对误差分别为7.5 %,-2.6 %和6.7 %,相对标准偏差分别为3.3 %,1.7%和4.1%,方法的准确度和精密度较好。方法检出限为0.1 mg/m<sup>3</sup>,测定下限为0.4 mg/m<sup>3</sup>。二氧化硫(SO<sup>2</sup>)、一氧化碳(CO)、氮氧化物(NO<sup>x</sup>)、硫化氢(H<sup>2</sup>S)、含湿量、烟尘等因素对方法的干扰较小,方法适用于现场测试。
关键词:  三氧化硫  固定污染源  分光光度法
DOI:
分类号:O659.3
文献标识码:B
基金项目:南京市环保科技基金资助项目(201710)
Determination of SO3 in Stationary Pollution Source
SONG Zu hua
Abstract:
A method for determination of SO<sub>3</sub> in stationary sources by isopropyl alcohol absorption spectrophotometry was established. The SO<sub>3</sub> flue gas with low,medium and high massconcentration was tested 9 times in succession. The results showed the relative errors were 7.5%,-2.6% and 6.7% respectively, RSDs were 3.3 %,1.7% and 4.1%.The accuracy and precision of the method are good.The detection limit was 0.1 mg/m<sup>3</sup> and the limit of quantitation was 0.4 mg/m<sup>3</sup>. The method shows slight interference from sulfur dioxide (SO<sub>2</sub>), carbon monoxide (CO), nitrogen oxides (NO<sub>x</sub>), hydrogen sulfide (H<sub>2</sub>S), moisture content, smoke and other factors. The method is suitable for field test.
Key words:  SO3  Stationary pollution source  Spectrophotometry