Mikrochemie und Materialprüfung

Catalytic and Induced Reactions in Microchemistry

“…By adding some lead salt to the solution the reaction for bismuth with alkaline stannite solution can be made 250 times more sensitive (13). Various examples of induced reductions involving the formation of precipitates are given by Feigl (8). The catalytic effect of mercury in the reduction of arsenic by stannous chloride or hypophosphite reagent is mentioned in the practical part of this paper.…”

The history of microanalysis

“…The oldest of these branches is microscopic analysis. According to Chamot and Mason (6), Feigl (7), and Meyer (8), microchemistry had its beginning in the middle of the 18th century when Sigismund Marggraf (1709-1782), during his research on cane sugar in red beet juice, first introduced the use of the microscope into chemistry.…”

“…Chamot and Mason (6) credit this to Raspail (1833), who is believed to have been the first to present a system of microscopic tests for chemists and to have suggested the identification of compounds by observation of crystals under the microscope. Deniges (9) and Feigl (7), on the other hand, mention Teichman as the "true founder" or "precursor" 1 Present address: Vassar College, Poughkeepsie, New York. of microchemistry, whose work (1853-57) described the microscopic identification of small traces of blood through the formation of characteristic hemin crystals.…”