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Analysis of NIST SRM 1598a Inorganic Constituents in Animal Serum for Mn determined via three instrumental techniques, comparing dilution with digestion, and aqueous and blood-based calibration protocols. Each data point is the mean ±U (error bars). The solid black line is the certified value for Mn and the dashed lines represent U(xNIST) limits from the NIST certificate. The method detection limits (MDL) are also shown as gray bars for each technique.
