An analytical comparison of two versions (US EPA and BIS) of pararosaniline method used for monitoring of ambient SO2

This study presents a comprehensive examination of the operational aspects of two versions of pararosaniline method employed for measuring SO2 in ambient air. The results indicate a need for redefining the specifications outlined in the BIS method. Notably, the BIS method displays greater sensitivity to low blank values compared to the EPA method. Additionally, the study introduces, for the first time, working factors and specifications associated with the BIS method for SO2 measurement. These findings suggest their potential inclusion in the standard method as a means to enhance data quality and reliability in the assessment of SO2 levels in ambient air.
Source: Air Quality, Atmosphere and Health - Category: Environmental Health Source Type: research