The Colorimetric Determination of Palladium with p-Nitrosodiphenylamine

Irreversible uptake of palladium from aqueous systems using l-cysteine methyl ester physisorbed on carbon black

“…p-Nitrosodiphenylamine is widely used as a colorimetric complexing reagent with high sensitivity for palladium(II) chloride in neutral and weakly acid solution. 26,27 The colorimetric determination of palladium(II) with p-nitrosodiphenylamine was carried out following the procedure of Yoe and Overholser. 26 A stock solution of 1000 ppm PdCl 2 was prepared by dissolving 0.174 g of PdCl 2 in 8.5 mL of concentrated hydrochloric acid and diluting to 100 mL with deionised water.…”

“…26,27 The colorimetric determination of palladium(II) with p-nitrosodiphenylamine was carried out following the procedure of Yoe and Overholser. 26 A stock solution of 1000 ppm PdCl 2 was prepared by dissolving 0.174 g of PdCl 2 in 8.5 mL of concentrated hydrochloric acid and diluting to 100 mL with deionised water. Other PdCl 2 solutions in a concentration range of 1 to 20 ppm were prepared by diluting this PdCl 2 stock solution with deionised water.…”

Sodium-p-(mercaptoacetamido)benzenesulphonate as a Spectrophotometric Reagent for Palladium

“…pNitrosodiphenylamine, 3) 3-hydroxyl-1-p-sulphonatophenyl-3-phenyltriazene,4) and 5-amino-2-benzimidazolethiol5) are the reagents commonly recommended.…”

Extraction and Spectrophotometric Determination of Palladium(II) with N‐P‐Chlorophenylbenzohydroxamic Acid

“…To test the reliability of the method 6 standard samples of palladium were analysed and the results were compared with M S and by nitrosophenylamino method (5,13). The results presented in Table 4 show that the palladium can be determined precisely and accurately.…”

“…Various organic reagents are reported for the extraction and spectrophotometric determination of palladium (1)(2)(3)(4)(5). Recently Beamish and Mc Bryde (6) described p-nitrodiphenylamine as a sensitive reagent for palladium where the exact control of pH is necessary.…”