Supplementary Information Table S-1: Summary of quality control data of six analytical batches of urine samples Laboratory Fortified Blank Method Detection Limits (MDLs) Method Reporting Limits (MRLs) Standard Reference Material (SRM) NIST 1640a (BS) % % % % % % mean SD mean SD % Rec. SD % Rec. SD 0.22 0.27 0.49 6.71 − − 0.05 1.01 0.01 100.33 7.81 − 0.32 0.43 2.51 3.67 100.00 10.41 −
Supplementary Information Table S-1: Summary of quality control data of six analytical batches of urine samples Method Detection Limits (MDLs) Method Reporting Limits (MRLs) Standard Reference Material (SRM) NIST 1640a Laboratory Fortified Blank (BS) mean SD mean SD % % % % % % % Rec. SD % Rec. SD 0.22 0.27 0.49 6.71 − − 0.05 1.01 0.01 − 100.33 7.81 0.32 0.43 2.51 3.67 − 100.00 10.41
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