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29. Solving a chemistry problem
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Uploaded: 19.04.2023
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Uploaded: 19.04.2023
Content: 34.rar 33,59 kB
Product description
34. The determination of chromium in water was carried out by the atomic absorption method according to the additive method. Samples of the analyzed and standard (12.0 μg/ml) solutions of chromium were introduced into volumetric flasks of 50 ml, diluted to the mark with water, acetylene-nitrous oxide was sprayed into the flame, and the optical density was measured at 357.9 nm. The results are shown below:
Volumes of solutions, ml Analyzed 10 10 10 10
Standard 0 10 20 30
A 0.205 0.296 0.383 0.472
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