作者greenearth (greenearth)
看板PCCU_Talk
标题[学业] 请教两题化学
时间Mon Jan 12 04:35:46 2009
A solution with 0.0837M X and 0.0500M S' gave area Ax=423 and As'=372.
Then 10mL of 0.050M S' plus 10mL of unknown were diluted to 25.0mL.
The chromatogram gave Ax=553 and As'=286. Find [X] in the unknown.
Suppose that s=0.28nA instead of 0.56nA, but y blank is still 1.26nA.
Find the signal detection limit, the minimum detectable concentration,
and the concentration of analyte in a sample with a signal of 7.0nA
有高手可以解题吗? 感激不尽啊~!!
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