[Colorimetric determination of nitrates and nitrites and nitrites in drinking water, food and biological samples].
D001826:Body Fluids / Q000032:analysis*; D003124:Colorimetry; D005504:Food Analysis; D006801:Humans; D009566:Nitrates / Q000032:analysis*; D009573:Nitrites / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D009566:Nitrates; D009573:Nitrites