OXYGEN COMBUSTION FLASKS and accessories for microdetermination of halogens, sulfur, phosphorus and other elements in organic compounds
T h o m a s I n f r a r e d Igniter
Thomas-Ogg Combustion Flask
Thomas Addition Funnel
ThomasSchôniger Flask
T h o m a s - O g g I n f r a r e d Igniter T h o m a s - L i s k C o m b u s t i o n Flask
T h o m a s - H a a c k Stopper w i t h s e p a r a b l e s a m p l e holders
For many years it was thought that combustion Thomas was the first to offer the Schôniger flask, equipment for conversion of organically bound eleand the first to recognize the value of modifications ments to inorganic radicals had to be complicated. as they were developed by subsequent authors. ModiElaborate combustion trains with furnaces, flowmeters, fications include the clamp-closed Ogg flask with tubes, boats, scrubbers and absorbers—or high presball-and-socket seal, which is somewhat easier to vent sure metal bombs—were used. The equipment was following combustion; the Lisk flask, which takes costly, the analysis was slow. larger samples and incorporates a rubber balloon for Schôniger, using a converted iodine flask with a safe expansion of gases during combustion; the Haack platinum flag sealed below the stopper, wrapping his stopper with its separable sample carriers; and the sample in a paper packet, and igniting the paper from Addition Funnel for wash-down of radioactive samples. a burner flame, obtained equally good results. The Most significant, because of their safety features only accessories he needed were an oxygen tank and when working with samples of unknown character, are a piece of rubber hose. The flask served as combusthe Ogg Infrared Igniters for remote firing of the samtion chamber, absorber, and finally as the titration or ple. The cabinet model is the more convenient, but the precipitation vessel . . . and there was no undesirable clamp-up model can be used in any suitable hood. metal contamination. Copy of detailed Bulletin 6472-B sent upon request. See also Thomas catalog pages 696-699.
Thomas
ARTHUR H. THOMAS COMPANY Scientific Apparatus and Reagents V I N E S T R E E T AT 3 R D • P . O . B O X 7 7 9 · P H I L A D E L P H I A 5 , PA.f U . S . A .
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