On the choice of color filters for the Breathalyzer.
D001944:Breath Tests / Q000295:instrumentation*; D003124:Colorimetry; D000431:Ethanol / Q000032:analysis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008027:Light; D012643:Selenium; D013053:Spectrophotometry; D013464:Sulfuric Acids; D014414:Tungsten
D013464:Sulfuric Acids; D000431:Ethanol; D012643:Selenium; D014414:Tungsten