title: Substoichiometric determination of mercury using 1-(2-pyridylazo)-2-naphthol.
abstract: A substoichiometric radiochemical method for the determination of mercury has been developed using 1-(2-pyridylazo)-2-naphthol (PAN) as a chelating agent. The chelate was extracted at pH 9.5 ( Na2CO3NaHCO3 buffer) into chloroform. 15-65 micrograms of mercury was determined with an accuracy +/- 0.9%. Effects of many diverse metal ions have been studied and procedures were developed for the suppression of interference due to these ions.
mesh_terms: D002614:Chelating Agents; D002725:Chloroform; D007477:Ions; D008628:Mercury / Q000032:analysis*; D008670:Metals; D009284:Naphthols; D011854:Radiochemistry / Q000379:methods*
chemical_list: D002614:Chelating Agents; D007477:Ions; D008670:Metals; D009284:Naphthols; C041728:1-(2-pyridylazo)-2-naphthol; D002725:Chloroform; D008628:Mercury