An indirect atomic absorption spectrophotometric method for the determination of 0.5 - 5 ~moles nitrate is described. The method is based on the formation of insoluble ternany complex, [Ag(Phen)2]N03 ' by adding an excess of [Ag(Phen)2] solution in nitrate sample. Absorbance of un reacted silver ions has been measured in an air-acetyl ene fl ame. The effect of various ions has been investigated. The method is successfully employed for the determination of nitrate in fertilizer samples.
T U HAQUE ,J ANWAR ,
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