对环境空气二氧化硫的测定曲线斜率偏低问题的探究

Research on Low Slope of Determination Curve of Sulfur Dioxide in Ambient Air

《环境空气二氧化硫的测定甲醛吸收-副玫瑰苯胺分光光度法》(HJ482-2009)为测定环境空气中二氧化硫的最常用方法,方法中要求在给定条件下曲线斜率为0.042±0.004,但是在实际分析过程中很少能达到此要求,对此进行了相关比对分析.

Formaldehyde Absorbing—Pararosaniline Spectrophotometry for Determination of Sulfur Dioxide in Ambient air(HJ482—2009)iS the most commonly used method for determination of sulfur dioxide in ambient air.In the method.the slope of the curve is required to be 0.042+0.004 under the given conditions.However.this requirement iS rarely met in the actual analysis process.and relevant comparative analysis iS carried out.