Low concentration replicate samples of Cd-EDTA gave the following counts in a mass spectral measurement: 195.9, 149.6, 159.3, 174.3, 143.3, 212.7, 164.3, 168.9, 158.3, 175.9. Ten measurements of a blank had a mean of 36.9 counts. A sample containing 2.00 ?M Cd-EDTA gave 1611 counts. Estimate the signal and concentration detection limits for Cd-EDTA.
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