Vow
OXYGEN COMBUSTION FLASKS
and accessories
» for microdetermination of halogens, sulfur, phosphorus
and other elements in organic compounds
VERTICAL
LAMP
Thomas Infrared Igniter
Thomas-Ogg
Combustion
Flask
Thomas
Addition
Funnel
Thomas-
Schéniger
Flask
Thomas-Ogg Infrared Igniter
Thomas-Lisk Combustion Flask
For many years it was thought that combustion
equipment for conversion of organically bound ele-
ments to inorganic radicals had to be complicated.
Elaborate combustion trains with furnaces, flowmeters,
‘tubes, boats, scrubbers and absorbers—or high pres-
sure metal bombs—were used. The equipment was
costly, the analysis was slow.
Schoniger, using a converted iodine flask with a
platinum flag sealed below the stopper, wrapping his
sample in a paper packet, and igniting the paper from
a burner flame, obtained equally good results. The
only accessories he needed were an oxygen. tank and
a piece of rubber hose. The flask served as combustion chamber, absorber, and finally as the titration or
precipitation vessel ... and there was no undesirable
metal contamination.
Thomas-Haack Stopper
with separable sample holders
Thomas was the first to offer the Schdniger flask,
and the ‘first to recognize the value of modifications
as they were developed by subsequent authors. Modifications include the clamp-closed Ogg flask with
ball-and-socket seal, which is somewhat easier to vent
following combustion; the Lisk flask, which takes
larger samples and incorporates a rubber balloon for
safe expansion of gases during combustion; the Haack
stopper with its separable sample carriers; and the
Addition Funnel for wash-down of radioactive samples.
Most significant, because of their safety features
when working with samples of unknown character, are
the Ogg Infrared Igniters for remotefiring of the sam-
ple. The cabinet model is the more convenient, but the
clamp-up model can be used in any suitable hood,
Copy of detailed Bulletin 6472-B sent upon request.
See also Thomas catalog pages 696-699.
TET, neers H. THOMAS COMPANY
Scientific Apparatus and Reagents