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Investigations into negative interference by jaundiced plasma in kinetic Jaffé methods for plasma creatinine
Annals of Clinical Biochemistry
|January 1, 1987
Abstract:
Negative interference by jaundiced plasma in kinetic Jaffé methods for plasma creatinine determination is caused by both conjugated and unconjugated bilirubin. The amount of interference observed is method- and temperature-dependent and is directly related to bilirubin concentration but is independent of the creatinine concentration. Bilirubin also significantly reduces the precision of the creatinine estimation. A mechanism of bilirubin interference in kinetic Jaffé methods is proposed and the influence of picrate concentration, hydroxide concentration and temperature on the magnitude of bilirubin interference has been investigated.