A tentative direct colorimetric method for aqueous sulfite suitable for atmospheric analysis of sulfur dioxide.
D000042:Absorption; D000397:Air Pollution / Q000032:analysis*; D003124:Colorimetry; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D008722:Methods; D010084:Oxidation-Reduction; D011725:Pyridines; D013053:Spectrophotometry; D013447:Sulfites; D013451:Sulfonic Acids; D013458:Sulfur Dioxide / Q000032:analysis*; D013843:Thiazines
D007202:Indicators and Reagents; D011725:Pyridines; D013447:Sulfites; D013451:Sulfonic Acids; D013843:Thiazines; D013458:Sulfur Dioxide