Fritz Pregl, was a Slovenian-Austrian chemist and physician from a mixed Slovene-German-speaking background. He won the Nobel Prize in Chemistry in 1923 for making important contributions to quantitative organic microanalysis, one of which was the improvement of the combustion train technique for elemental analysis. The Nobel Prize in Chemistry 1923, announced November 13, 1923. Fritz Pregl, “for his invention of the method of micro-analysis of organic substances”. Fritz Pregl: born 1869, Laibach, Austria-Hungary (now Ljubljana, Slovenia). Wiki link Data: the Nobel Foundation (CC0).