Chemistry, 26.11.2020 02:10 Bangggggg6

A spectrophotometric method for the quantitative determination of the concentration of pb² in urine yields an ssamp of 0.712 for a 5.00-ml sample of urine. After spiking the urine sample with 5.00ml of a 1560-ppb pb²+standard an spike of 1.546 is measured determined the concentration of pb²+ in the original sample of urine

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