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A new flame atomic-absorption spectroscopic method of determining antimony in the atmosphere was compared with the recom
Posted: Fri Nov 26, 2021 8:35 am
by answerhappygod
- A New Flame Atomic Absorption Spectroscopic Method Of Determining Antimony In The Atmosphere Was Compared With The Recom 1 (47.6 KiB) Viewed 42 times
- A New Flame Atomic Absorption Spectroscopic Method Of Determining Antimony In The Atmosphere Was Compared With The Recom 2 (47.6 KiB) Viewed 42 times
A new flame atomic-absorption spectroscopic method of determining antimony in the atmosphere was compared with the recommended calorimetric method. For samples from an urban atmosphere the following results were obtained: Sample no. 1 2 3 Standard method Antimony found (mg m) 4.16 4.34 4.87 4.17 5.33 5,48 New method Antimony found (mgm') 4.38 4.15 4.76 4.42 4.80 4.74 4 5 6 (a) Compare the precision of the two methods and determine if the precisions of the two methods are significantly different or not, using a significand level of 0.05 (95 % confidence level). Assume that the data are normally distributed. Explain your results. (b) Determine if the means of the two methods differ significantly (95% confidence level). Assume that the data are normally distributed. Explain your results.