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. Author manuscript; available in PMC: 2017 Aug 23.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2016 Dec 13;1044-1045:200–205. doi: 10.1016/j.jchromb.2016.12.019

Table 3.

Method accuracy and precision based on three proficiency tests

formulated conc. (μg/mL) calculated mean conc. (μg/mL) % RSD % Error % Accuracy
1.00 0.89 2.69 −11.5 88.5
3.00 2.94 1.53 −2.08 97.9
6.00 6.04 2.27 0.58 99.4
9.00 8.08 9.81 −10.2 89.8

RSD = relative standard deviation