Gas Chromatographic Determination of Trimethyl Phosphate, Dimethylbutyl Phosphate, Methyldibutyl Phosphate and Tributyl Phosphate

Reaction of Pentenes, Hexenes, and Heptenes with Phosphoric Acid

“…This statement should be further qualified. Linear alkyl phosphoric acid esters have been successfully analyzed by gas chromatography following on derivatization by methylation with diazomethane. − The methylated alkyl phosphoric acid esters were more volatile, and analysis by gas chromatography was in principle possible. However, despite the precautions taken, injection port thermal degradation was observed in chromatograms .…”

“…Linear alkyl phosphoric acid esters have been successfully analyzed by gas chromatography following on derivatization by methylation with diazomethane. − The methylated alkyl phosphoric acid esters were more volatile, and analysis by gas chromatography was in principle possible. However, despite the precautions taken, injection port thermal degradation was observed in chromatograms . It was anticipated that alkyl phosphoric acid esters of branched olefins would be thermally more labile than linear alkyl phosphoric acid esters, which would exacerbate thermal decomposition during analysis by gas chromatography.…”

“…However, despite the precautions taken, injection port thermal degradation was observed in chromatograms. 17 It was anticipated that alkyl phosphoric acid esters of branched olefins would be thermally more labile than linear alkyl phosphoric acid esters, which would exacerbate thermal decomposition during analysis by gas chromatography. It was decided that chromatographic separation had to be performed without the aid of elevated temperature, which suggested the use of high performance liquid chromatography.…”

“…One potential risk with employing gas chromatography for quantifying 1-hexene conversion was that alkyl phosphoric acid esters could thermally decompose in the GC injector, 17 which was kept at 250 °C and well above the decomposition temperature of alkyl phosphoric acid esters. This affects the interpretation of the results.…”

Gas chromatography

“…Umilin and coworkers (867) measured the temperature dependence of vapor pressure of bis-arenyl-7r-complexes of vanadium and successfully eluted various ethylbenzoyl-molybdedenum organometallics gas chromatographically (866). Tin (584), selenium and tellurium (262), chromium (467), and thallium (695) organometallic compounds are among those which have now been evaluated gas chromatographically, and research on the elution of nitrogen oxides (76, 334) and organophosphates, and other phosphorus esters was active (399,771).…”