Bromine oxygen flask combustion

Applications Basic methods for the determination of halogens in polymers are fusion with sodium carbonate (followed by determination of the sodium halide), oxygen flask combustion and XRF. Crompton [21] has reported fusion with sodium bicarbonate for the determination of traces of chlorine in PE (down to 5 ppm), fusion with sodium bisulfate for the analysis of titanium, iron and aluminium in low-pressure polyolefins (at 1 ppm level), and fusion with sodium peroxide for the complexometric determination using EDTA of traces of bromine in PS (down to 100ppm). Determination of halogens in plastics by ICP-MS can be achieved using a carbonate fusion procedure, but this will result in poor recoveries for a number of elements [88]. A sodium peroxide fusion-titration procedure is capable of determining total sulfur in polymers in amounts down to 500 ppm with an accuracy of 5% [89]. 

Oxygen flask combustion Combustion takes place at atmospheric pressure in oxygen water is used as the absorbent. It is suitable for determining sulfur, phosphorus, chlorine, and bromine. 

An oxygen flask combustion method for the determination of between 2 and 80% of chlorine, bromine and iodine in polymers is described in Methods 2.2 and 2.3 at the end of this chapter. 

Method 2.3 Determination of Up to 80% Chlorine, Bromine and Iodine in Polymers. Oxygen Flask Combustion - Titration... 

This qualitative oxygen flask combustion method [29] enables nitrogen, fluorine, chlorine, bromine, iodine, sulfur and phosphorus to be identified in polymers in amounts down to 0.01%. 

Haslam et af have adopted the oxygen flask combustion technique to the qualitative detection in polymers of nitrogen, chlorine, bromine, iodine, fluorine, phosphorus and sulphur in amounts down to 0.25%, (see Method 104). 

METHOD 77 - DETERMINATION OF UP TO 80% CHLORINE, BROMINE AND IODINE IN POLYMERS. OXYGEN FLASK COMBUSTION - TITRATION PROCEDURE. 

This oxygen flask combustion - titration procedure is capable of determining between 2 and 80% of total chlorine, bromine or iodine in polymers. 

Sulphobromophthalein sodium, C2oHgOioBr4S2Na2, Mol, Wt. 838-1 can be assayed for bromine and sulphur by the oxygen-flask combustion method (Appendix IV). 

Ion chromatography has been successfully applied to the quantitative analysis of ions in many diverse types of industrial and environmental samples. The technique has also been valuable for microelemental analysis, e.g. for the determination of sulphur, chlorine, bromine, phosphorus and iodine as heteroatoms in solid samples. Combustion in a Schoniger oxygen flask (Section 3.31 )is a widely used method of degrading such samples, the products of combustion being absorbed in solution as anionic or cationic forms, and the solution then directly injected into the ion chromatograph. 

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