Sissons and Telling's (18) method for the simultaneous determination of water-soluble organophosphoric pesticides in vegetables has been successfully applied to tobacco. With this method monocrotophos, dicrotophos, dimethoate, formothion, methyl demeton-S-methyl, mevinphos, paraoxonmethyl, phosphamidon and trichlorphon can be quantitatively analysed speedily and with good recoveries.