Chemistry, 10.10.2019 05:10 jtoole5341

Ibrahim and co-workers developed a new method for the quantitative analysis of hypoxanthine, a natural compound of some nucleic acids. 14 as part of their study they evaluated the method's selectivity for hy- poxanthine in the presence of several possible interferents, including ascorbic acid. (a) when analyzing a solution of 1.12 x 10-m hypoxanthine the au- thors obtained a signal of 7.45 x 10- amps. what is the sensitivity for hypoxanthine? you may assume the signal has been corrected for the method blank. (b) when a solution containing 1.12 x 10-6 m hypoxanthine and 6.5x10m ascorbic acid is analyzed a signal of 4.04 x 10amps is obtained. what is the selectivity coefficient for this method? (c) is the method more selective for hypoxanthine or for ascorbic acid? (d) what is the largest concentration of ascorbic acid that may be pres- ent if a concentration of 1.12 x 10-° m hypoxanthine is to be de- termined within 1.0%?

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Ibrahim and co-workers developed a new method for the quantitative analysis of hypoxanthine, a natur...