a sample of pure water was spiked with 0.5400.540 ng/ml silver ion. ten replicate determinations of the spiked water sample gave 0.5500.550 , 0.5300.530 , 0.5070.507 , 0.4930.493 , 0.5340.534 , 0.5140.514 , 0.5180.518 , 0.5220.522 , 0.5000.500 , and 0.4850.485 ng/ml silver ion. determine the mean percent recovery of the spike and the detection limit of the analytical method used for the silver ion determination.



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