Journal of Chromatography A, 1081 (2005) 145–155 Residuedetermination of glyphosate, glufosinate and aminomethylphosphonic acid in water and soil samplesby liquid chromatography coupled to electrospray tandem massspectrometry Mar′?a Ib′a?nez, ′OscarJ. Pozo,Juan V. Sancho,Francisco J. L′opez, F′elix Hern′andez? Research Institute for Pesticides and Water, University Jaume I, E-12071 Castell ′on, Sp