The introduction of the blowpipe into dry qualitative analysis by Axel Fredrik Cronstedt marks an important innovation.
theoretical preconceptions used in qualitative analysis often do not represent explicit propositions about empirical facts.
Apart from his administrative duties Fresenius occupied himself almost exclusively with analytical chemistry, and the fullness and accuracy of his text-books on that subject (of which that on qualitative analysis first appeared in 1841 and that on quantitative in 1846) soon rendered them standard works.
For further information on this subject, we refer the readers to Fresenius's Qualitative Analysis.
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