Linearity	LOQ
	r²a	Slopea	Offseta	µM
without matrix	0.99999	0.0223	-0.0019	1
1:10 diluted matrix	0.99999	0.0221	-0.0011	1
	Standard	Meanb	Precisionb	Accuracyb
	µM	µM	CV%	Bias (%error)
without matrix	50	49.96	3.05	-0.09
	1	1.04	2.95	3.86
1:10 diluted matrix	50	49.98	0.44	-0.04
	1	1.00	4.58	0.33
a Mean of three measurements, calibration with six concentrations of pyruvate from 1 to 50 µM.
b (n = 3)
LOQ: limit of quantification, CV: coefficient of variation.