Automated Jendrassik-Grof method for measurement of bilirubin in serum with the Greiner Selective Analyzer (GSA IID), and comparison with the method involving diazotized 2,4-dichloroaniline

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Abstract

We automated the Jendrassik-Grof method for measurement of bilirubin with the Greiner Selective Analyzer GSA II D. Comparison with the manual Jendrassik-Grof method showed a highly significant correlation coefficient of 0.994 for total and 0.980 for 'direct' bilirubin measurement. The automated method showed good precision and was linear to 667 μmol/L, the highest concentration tested. Addition of hemolysate caused a greater effect on the measurement of direct bilirubin than on total bilirubin. The inhibitory effect on measurement of total bilirubin, though small, was statistically significant at hemoglobin concentrations >2 g/L. Comparison with the method involving diazotized 2,4-dichloroaniline showed the Jendrassik-Grof method to be relatively less affected by hemolysis and turbidity in the measurement of total bilirubin.

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Cherian, A. G., Soldin, S. J., & Hill, J. G. (1981). Automated Jendrassik-Grof method for measurement of bilirubin in serum with the Greiner Selective Analyzer (GSA IID), and comparison with the method involving diazotized 2,4-dichloroaniline. Clinical Chemistry, 27(5), 748–752. https://doi.org/10.1093/clinchem/27.5.748

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