Table 1. Analytical imprecision of three enzymatic techniques for measuring total bile acids.

	Intra-assay			Inter-assay
	Mean (μmol/L)	SD (μmol/L)	CV	Mean (μmol/L)	SD (μmol/L)	CV
Pool Low
Diazyme	16.60	0.07	0.44%	16.28	0.55	3.37%
Randox	14.68	0.16	1.12%	15.34	0.60	3.91%
Sentinel	18.35	0.31	1.66%	17.51	0.43	2.47%
Pool High
Diazyme	118.56	2.59	2.18%	118.69	2.40	2.03%
Randox	137.03	1.33	0.97%	146.03	3.47	2.37%
Sentinel	150.31	1.26	0.84%	149.65	1.52	1.02%

SD, standard deviation; CV, coefficient of variation.