METHOD OF DETERMINING ACTIVITY OF ALKYLFLUOROPHOSPHONATE VAPORS IN AIR Russian patent published in 2007 - IPC G01N30/72 

FIELD: analytical methods.

SUBSTANCE: vapors of alkylfluorophosphonates are concentrated on high-molecular weight sorbent based on 2,6-diphenyl-p-phenylene oxide having grain size 35/60 mesh and placed into metal tube. Vapors are then desorbed into gas carrier flow. Vapors of alkylfluorophosphonates are re-adsorbed from gas carrier on indicated high-molecular weight sorbent with grain size 60/80 mesh placed in glass tube and then re-desorbed into gas carrier flow and simultaneously introduced into chromatographic capillary column coated with layer of low-polarity fixed phase (5%-phenyl-95%-methylpolysiloxane). Test composition is separated in the column at constant temperature followed by raising of temperature at a rate of 15°C/min up to 150°C. Separated components are detected and detector signal is recorded in digital form. When analyzing O-ethylmethylfluorophosphonate, ions with mass/charge ratios 111.0, 98.9, 81.9, and 80.9 are registered. When analyzing O-isopropylmethylfluorophosphonate, ions with mass/charge ratios 125.0, 98.9, 80.9, and 42.9 are registered. When analyzing O-isobutylmethylfluorophosphonate, ions with mass/charge ratios 112.0, 98.9, 81.9, and 80.9 are registered. When analyzing O-pinacolylmethyllfluorophosphonate, ions with mass/charge ratios 126.0, 98.9, 81.9, and 69.0 are registered. Mass percentages of alkylfluorophosphonates are determined using absolute calibration technique.

EFFECT: increased reliability of determination.

2 cl, 2 tbl