. Author manuscript; available in PMC: 2014 Mar 18.

Published in final edited form as: Chem Res Toxicol. 2013 Feb 15;26(3):388–398. doi: 10.1021/tx300479w

Table 2.

Precision and accuracy in the determination of GS-DCBN and other metabolites in serum samples^a

Levels	GS-DCBN		Gly-Cys-DCBN		Cys-DCBN		N-acetyl-Cys-DCBN
Spiked (nmol/ml)	13.5	54	2.5	10	5	20	15	60
Detected (mean) (nmol/ml)	15.9	61.2	2.4	8.8	4.9	16.2	14.2	52.5

Relative error (%)	17.8	13.3	−4.4	−12.0	−2.0	−19.0	−5.3	−12.5
RSD (%)	5.3	5.0	13.0	5.9	7.5	6.3	5.5	5.9

Precision is expressed as relative standard deviation (RSD; 100% × SD/mean). Accuracy is expressed as relative error [100% × (mean detected concentration − spiked concentration)/spiked concentration].