Title : Analysis of methylphosphonic acid, ethyl methylphosphonic acid and isopropyl methylphosphonic acid at low microgram per liter levels in groundwater - Sega_1997_J.Chromatogr.A_790_143 |
Author(s) : Sega GA , Tomkins BA , Griest WH |
Ref : Journal of Chromatography A , 790 :143 , 1997 |
Abstract :
A method is described for determining methylphosphonic acid, ethyl methylphosphonic acid and isopropyl methylphosphonic acid, which are hydrolysis products of the nerve agents VX (S-2-diisopropylaminoethyl O-ethyl methylphosphonothiolate) and GB (sarin, isopropylmethyl phosphonofluoridate). The analytes are extracted from 50 ml groundwater using a solid-phase extraction column packed with 500 mg of silica with a bonded quaternary amine phase, and are eluted and derivatized with methanolic trimethylphenylammonium hydroxide. Separation and quantitation are achieved using a capillary column gas chromatograph equipped with a flame photometric detector operated in its phosphorus-selective mode. Two independent statistically-unbiased procedures were employed to determine the detection limits, which ranged between 3 and 9 micrograms/l, for the three analytes. |
PubMedSearch : Sega_1997_J.Chromatogr.A_790_143 |
PubMedID: 9435117 |
Sega GA, Tomkins BA, Griest WH (1997)
Analysis of methylphosphonic acid, ethyl methylphosphonic acid and isopropyl methylphosphonic acid at low microgram per liter levels in groundwater
Journal of Chromatography A
790 :143
Sega GA, Tomkins BA, Griest WH (1997)
Journal of Chromatography A
790 :143