固定污染源废气中三氧化硫测试方法初探

宋祖华

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（SO₃）的方法，分别连续9次测试低、中、高3个质量浓度的SO₃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/m³，测定下限为0.4 mg/m³。二氧化硫（SO²）、一氧化碳（CO）、氮氧化物（NO^x）、硫化氢（H²S）、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 SO₃ in stationary sources by isopropyl alcohol absorption spectrophotometry was established. The SO₃ 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/m³ and the limit of quantitation was 0.4 mg/m³. The method shows slight interference from sulfur dioxide (SO₂), carbon monoxide (CO), nitrogen oxides (NO_x), hydrogen sulfide (H₂S), moisture content, smoke and other factors. The method is suitable for field test.

Key words: SO₃ Stationary pollution source Spectrophotometry