OIML Recommendation R 135

Spectrophotometers for medical laboratories

Scope: This Recommendation provides requirements for defining, testing and verifying the performance of spectrophotometers used in clinical chemistry laboratories to determine concentrations of analytes in samples of blood, serum, plasma, liquor cerebrospinalis, urine, etc. derived from the human body by measuring the characteristic partial internal absorbances of prepared solutions in optical cells (cuvettes).