Analytical applications of 3-(2′-thiazolylazo)-2,6-diaminopyridine: Spectrophotometric determination of palladium

Determination of Pd(II) content in catalysts and tap water samples via photoacoustic spectroscopy analysis of Pd(II)-3-[2′2′-thiazolylazo]-2,6-diaminopyridine complex on solid phase

“…3. The PA spectrum of the 2,6-TADAP-resin shows two absorption bands localized in the ranges 400-445 nm (band 1) and 460-600 nm (band 2) in agreement with previously published photometric bands assignments of the ligand adsorbed on the resin [25,27,28]. No other pronounced peaks are observed in the blank spectrum.…”

“…These values were selected as optimal conditions for the formation of the solid phase (2,6-TADAP-resin). Because 2,6-TADAP is soluble in strong acid solutions [25], preparation of the solid phase was optimized at a pH ranging from 1.5 to 3, with a pH 2 being the optimal.…”

“…Working standard solutions of Pd were prepared daily by appropriate dilution of the stock standards. Synthesis of the 2,6-TADAP was carried out as indicated in literature [25]. A 2,6-TADAP solution 5 × 10 −3 mol L −1 in HCl 1 mol L −1 was used.…”

Synthesis, characterization, and pepsin inhibition study of Au(III)–3-(2′-thiazolylazo)-2,6-diaminopyridine complex

“…TADAP was synthesized according to Montelongo [10]. The synthesis of Au(III)-TADAP complex was performed by mixing 0.48 mmol K (AuCl 4 ), 0.48 mmol TADAP and 0.1 mmol NaCl in 27 ml of tetrahydrofuran.…”

Polarographic behaviour of 3-(2?-thiazolylazo)-2, 6-diaminopyridine using DC and differential pulse polarography

“…Heterocyclic azo compounds, especially 3-(2'-thiazolylazo)-2,6-diaminopyridine (2,6-TADAP) have recently found wide use in the spectrophotometric analysis [4][5][6] and can now be regarded as one of the most important classes of chromogenic reagents. 2,6-TADAP has been reported as a sensitive and selective reagent for determination of Cu(II) [6].…”