The National Bureau of Standards' carbon yellow filter as a monitor for spectrophotometric performance. Successful experiences for 7 years in certifying the National Research Council's cyanmethemoglobin standard.
D000042:Absorption; D002244:Carbon; D005374:Filtration / Q000592:standards*; D006077:Government Agencies; D006452:Hemoglobinometry / Q000592:standards*; D008706:Methemoglobin / Q000032:analysis*; D012955:Societies, Medical; D013053:Spectrophotometry; D014481:United States
D002244:Carbon; D008706:Methemoglobin