
The assay utilizes an in vitro enzymatic colorimetric methodology to detect total bile acids in serum and can be automated using pre-existing clinical chemistry instrumentation.
The enzymatic method employs the conversion of the bile acids to a 3-ketosteriod with the simultaneous reduction of NAD+ to NADH. The reduction of NO2-TB takes place after the production of NADH to form a reddish violet color. The amount of TBA is determined spectrophotometrically by measuring the absorbance of this color at 546nm.
The assays performance includes a within-run precision of 5.9 percent CV and 1.17 percent CV with mean concentrations of 11.3umol/L and 4206umol/L respectively. The linear range of the assay is 0-150umol/L.
Wako
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Keywords: GI testing