Oxyhydrogen combustion apparatus

Fig. 9.1 The oxyhydrogen combustion apparatus A, pyrolysis tube B, oxyhydrogen torch C, flame chamber D, absorber E, spray trap F, removable joint G, sweep oxygen inlet H, three-way stopcock I, spiral condenser J, joint P, probe burner x, oxygen inlet y, hydrogen inlet. (From Ref. 8. Reproduced by permission of the American Chemical Chemical Society.)...

Other versions of the oxyhydrogen torch have been developed [12]. A combustion apparatus is commercially available from Heraeus [13]. In an aspirating combustion apparatus, which draws a liquid sample directly into the oxyhydrogen flame, the sample may be swept through the flame without a complete combustion. A two-stage combustion sequence is essential for the complete conversion of organic fluorine to fluoride (1) the pyrolysis and partial combustion of the sample in the pyrolysis tube and (2) the complete breakdown of the pyrolysis products in the oxyhydrogen flame. 

In the Wickbold method, solid samples are vaporised in an oxygen stream and fed into an oxyhydrogen flame, which bums in a cooled quartz tube. The combustion products are condensed here, or are captured in an absorption solution as gaseous materials. Although combustion in a Wickbold apparatus is a quick and effective method for destroying organic material of all types, incomplete destruction may occur [19]. In special digestion vessels, known as cold-plasma ashers (CPA),... 

Oxyhydrogen Furnace Adapter—An apparatus, used in the oxyhydropyrolysis set up, that fits to the front of the reaction tube and adds an injection tube that extends partially within the main reaction tube to about 1/2 way into the furnace (see Fig. 1). The oxidative process occurs in Ae injection tube, fiien the combustion products of the sample are injected into the flow of hydrogen at the hot zone. 

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