Spot Test Detection of Aliphatic Halogen Compounds Based on Pyrolytic Reduction by Benzoin FRITZ FEIGL and DORA HAGUENAUER-CASTRO laboratorio da Produ+o Mineral-Minist6rio das Minas e Energia, Rio de laneiro, Brasil Translated by RALPH E. OESPER, University of Cincinnafi, Cincinnati, Ohio
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A spot test for the detection of aliphatic haiogen compounds i s described. The test is based on their pyrolytic reduction by benzoin. Aliphatic halogen compounds a.ontaining the groups -CH2 hal, ' k H hol and \ -C hat
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yield halogen hydrides with molten benzoin and these products can be detected readily in the gac phase by their action on indicator pcpt 'i Microgram amounts of the aliphatic compounds can be differentiated fiom the -J;omatic compounds.
Dpot test procedure ( 6 ) for t r r . sensitive and specific detectior, c i elementary sulfur is based on the reaction nit11 benzoin:
, I .
S
+r CaH5CHOHCOCeHs
-+
CaHsCOCOC&
+ HzS
The above redox reaction is not realizable by the wet method; however it proceeds very rapidly in molten benzoin
