| [determination of certain pesticides, nitrates, nitrites, ammonium ions, sulphates, urea and chlorides in surface and underground water and in certain agricultural products. vi]. | the subject of this study was determination of the residue of pesticides (lindane, methoxychlor, and chlorfenvinphos) nitrates, ammonium ions, sulphates and urea in surface waters and underground waters and in potatoes in 11 localities in the eastern part of the province of szczecin in 1987. the pesticides were determined by gas chromatography, while nitrates, nitrites, ammonium ions, sulphates and urea by spectrophotometry, chloride--by precipitation. the obtained results showed that contaminat ... | 1989 | 2637482 |