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Interferences 1. In the presence of lead (1000 mg/1), a spectralmterference may occur at the 217 6 nm resonance lme In thIS case the 231 1 nm antImony lme should be used 2 Increasmg aCId concentrations decrease antImony absorptIon To aVOid thIS effect, the aCId concentratIon 10 the samples and 10 the standards should be matched Notes 1 Data to be entered mto STORET must be reported as ug/1 2 For concentrations ofantlffiony below 0 35 mg/1, the furnace procedure (Method 204 2) IS recommended Precision and Accuracy 1 In a smgle laboratory (EMSL), usmg a mIXed mdustnal-domestIc waste effiuent at concentratIOns of 5 0 and 15 mg Sbl1, the standard devIatIons were ±O 08 and ±O 1, respectively Recovenes at these levels were 96% and 97%, respectIvely 2041-2PDF Image | Methods for Chemical Analysis of Water and Wastes
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