Kobuk Watershed Stewardship Project

RPD = (R1 - R2) x 100 ((R1 + R2)/2) where: RPD= Relative Percent Difference and. R1 and R2 are the initial and duplicate measurement values, respectively . in case of MS/MSD and/or LCSD/LCSD. R1 = % Recovery of the target compound in the initial analysis (from MS or LCS) ................
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