Fritz (Friedrich) Feigl, Austrian-born Jewish Brazilian analytical chemist and microchemist (Wien 15 May 1891 - Rio de Janeiro 23 January 1971)
ACHIEVEMENTS
Regarded as one of most notable analytical chemists of world in all times
Published 550 papers First related specific and selective properties to existence of certain groupings in molecule Idealized and created spot tests in 1920s
Elaborated thousand spot tests for detecting organic and inorganic substances
Introduced masking and unmasking concepts in selectivity of reactions (1955)
Defined with accuracy the concepts of limit of identification and limit of dilution
Distinguished specific reactants from selective reactants being the concept adopted by IUPAC
Introduced with Stern capilar effect of filter paper in identifying of components by drop reactions (1921)
Developed organic reactants for inorganic analysis
Developed luminol
Introduced microscale in chemistry learning Enunciated classification principles and rules to search for new tests and analytical reagents With A. Schaeffer developed a method for extracting caffeine from coffee and maté plants via direct sublimation
A procedure for solubilization of phosphate from phosphorous bauxite With Krumholz & Hamburg proposed sodium sulfite as a reducing agent and as a buffer With P. E. F. Barbosa. A new procedure for detecting acidity. Industrial and Engineering Chemistry-Analytical Edition. 14:6, With O. Ribeiro. Uma micro reação para a vitamina B1. Rev. Soc. Bras. Quim. 11:3-7, 1942 With E.K. Libergott. Test for elenmental arsenic and sulfur based on the formation of arsenic sulfide. Zeitschr. fur Angew. Chimie 233(6):401, 1968 With I. Ciornai, A. Espínola, P.W. West, H.E. Feigl et al. News methods of qualitative and quantitative analyses of selenium, titanium, chromium, cobalt and tin. Bol. Depart.Nac. Prod. Mineral 24 (1946-8) With C.R. Hesg. Novos sais complexos de cianeto de paládio com bases orgânicas (1949)
With H.E. Feigl. Novo método de identificação de cianetos, baseado no desmascaramento de dimetilglioximo de potássio e paládio (1949) Published Chemistry of Specific, Selective and Sensitive Reactions (1949) in Brazil. It was considered one of most notable works in chemistry of all the times.
Chemistry Nobel Prize nominee (1955, 1957, 1962 & 1963)
TESTS
With R. Moscovici a color test for the detection of sulfoxone sodium in very small quantities With R. Moscovici a new test for monochloroacetic acid (1955) With C. Costa Neto spot test for diketones and quinines based on catalytic effect (1956) With V. Gentil & Jungreis a spot test for aliphatic and aromatic cyanides With V. Gentil a new spot reaction for tin based on the fluorescent absorption compounds With V. Gentil & Stark-Mayer a test for secondary alcohols and 1,2 diketones With V. Gentil & D. Goldstein a spot test for thallium with Rhodamine B With D. Goldstein a specific test for cobalt (1956) With D. Goldstein & Libergott three spot tests for the detection and differentiation of cyanamide and dicyandiamide
With Krumholz invented quinalizarin test
With Krumholz benzidine reaction of silicic acid
EPONYMY Feigl test for antimony Feigl test for cobalt Feigl cerium tests Feigl micro reaction for copper Feigl micro-reaction for phosphate Feigl-Pavelka calcium test Feigl-Zappert acetic acid test Leitmeier-Feigl test for chromium in minerals Feigl-Leitmeier diphenylcarbazide test Feigl-Neuber copper tests Griess-Feigl reagent (p-nitroaniline) Feigl-Anger reaction for detecting hydrocyanic acid and cyanogen (1966) with Vincenz Anger Feigl-Silva reaction Feigl Ni-dimethylglyoxime reagent (1966) Krumholz-Feigl-Rajmann reagent (1931) Thiocyanate-stannous chloride method of Feigl-Krumholz (1932) Feigl-Krumholz test or method (1933) Feigl-Krumholz gas-reaction vessel Feigl-Zappert-Vasquez for methylcetones Feigl reagent for phenols LINKS Quimica Nova 27(1):169-176, 2004 (in Portuguese)
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