Carbonyl sulphide analysis

The analysis of the water gas so far given enumerates the chief constituents, but in reality there are traces of other products, such as carbon bisulphide, carbonyl sulphide, and thiophene, derived from the sulphur in the uel, which, minute in quantity, may nevertheless in the certain chemical processes produce appreciable and un-iesirable results from the iron contained in the fuel, ninute amounts of iron carbonyl are formed, which in nost processes in which water gas is used is a matter jf no importance, but if the gas is to be used for ighting with incandescent mantles, its removal is de-.irable. 

Staszewski, R., Pompowski, T., Janak, J. Analysis of a mixture of carbon dioxide, hydrogen sulphide, carbonyl sulphide, carbon disulphide and sulphur dioxide by gas-liquid chromatography. Chem. Anal. 8, 897 (1963). — Chem. Abstr. 60, 15141 (1964). 

The xanthate precursor route is another method to prepare PPV. The PPV synthesized by the XPR is more amorphous that PPV synthesized via the SPR. The more amorphous PPV has been reported to exhibit better photoluminescence efficiency. Evolved gas infrared spectral analysis demonstrates loss of the xanthate group in the form of carbonyl sulphide (COS) and thiol (CH3CH2SH) byproducts. The loss of COS occurs first as the precursor is heated to -ISO ° C. The three-dimensional temperature-... 

Treatment of test solutions with specific reagents in combination with the phase-equilibrium method for functional group identification of volatile impurities in aqueous solutions is common [19—23]. The analysis is based on the interaction of a definite class of substances with the selected reagents in the liquid phase with the formation of involatile derivatives, accompanied by the disappearance of the corresponding peaks in the chromatogram of the equilibrium gas phase above the solution (e.g., carbonyl compounds are removed on treatment of the test solution with hydroxylammonium chloride, sulphides with mercury(II) chloride and ethers and carbonyls with basic hydroxylamine... 

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