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| 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） |
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| Determination of SO3 in Stationary Pollution Source |
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SONG Zu hua
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| 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 |
