Spectrophotometric Determination of Palladium(II) Ions Using a New Reagent: 4-(N’-(4-Imino-2-oxo-thiazolidine-5-ylidene)-hydrazino)-benzoic Acid (p-ITYBA)

Table 2

Comparison of the present method with other spectrophotometric methods for Pd(II) determination.

Reagent [references]	Conditions	λmax, nm	εmax, L·mol^−1·cm^−1	M : L	Linear range, μg·mL^−1	Interfering ions
3,4-Dihydroxy-benzaldehydeisonico-tinoylhydrazone [3]	pH = 3.0, acetate buffer	380	5.3 × 10^3	1 : 1	0.5–20.0	Cu^2+
Dimethylglyoxime [7]	2 mol·L^−1 HCl or H2SO4, CHCl3; 0.8 mol·L^−1 HNO3, pH = 1.0, CHCl3	270; 370	9.0 × 10^3; 1.9 × 10^3	1 : 2	25–125; 100–800	Pt^2+, Fe^2+, Ir^3+, Au^3+
Α-Furildioxim [7]	0.1–1.4 mol·L^−1 HCl, CHCl3	380	2.2 × 10^4	1 : 2	1–3	–
Arsenazo III [7]	pH 3.4–5.9	630	4.2 × 10^4	1 : 1, 2 : 1	1.16–3.0	Cu^2+, Ni^2+, Co^2+
Nitroso-R-salt [7]	pH = 5.6 to 0.1 mol·L^−1 HCl; 0.05 mol·L^−1 HNO3, 2.6 mol·L^−1 CH3COOH	510; 520–560	1.2 × 10^4; 9.7 × 10^4	1 : 2	1.3–4.3; 0.1–2.6	Co^2+, Cl^−
Β-Nitroso-α-naphthol [7]	pH = 1.0–2.0, CHCl3, toluene	308; 385; 370	2.2 × 10^4	1 : 2	1–5; 0.1–10	Cu^2+, Co^2+, Ni^2+, Cr^3+, Fe^3+, CN^−
Palladiazo [7]	pH = 3.5, n-butanol	640, 675	5.7 × 10^4	1 : 1, 2 : 1	0.2–5.0	Pb^2+, Bi^3+, Cl^− REE
4-(4’-Antipyriyl azo)-2-bromo phenol [8]	pH = 4.0–7.0	498	2.1 × 10^3	1 : 2	0.2–3	Cu^2+, Co^2+, V^5+, Ag^+, Fe^3+
Sulphochlorophenol-azorhodanine [10–12]	8 mol·L^−1 H3PO4 + 5 mol·L^−1 H2SO4; 1 mol·L^−1 HCl, 1–2 h	520; 520	1.2 × 10^5; 5.0 × 10^4	–	–	Pt^4+, Rh^3+
5-Hydroxyimino-4-imino-1,3-thiazo-lidin-2-one [18, 20]	pH = 5.0, acetate buffer, 10 min (∼98°C)	350	5.9 × 10^3	1 : 1	0.6–6.4	Pt^4+, Ru^4+, Rh^3+, Ir^4+, Fe^3+, Cu^2+
4-(N’-(4-Imino-2-oxo-thiazolidin-5-ylidene)-hydrazino)-benzene-sulfonic acid [23]	pH = 7.6–8.3	438	7.5 × 10^3	1 : 2	0.2–2.2	Ir^4+, Ru^4+
1-(2-Benzothiazolyl-azo)-2-hydroxy-3-naphthoic acid [32]	5.0 mol·L^−1 HCl and cetyl trimethyl ammonium bromide	669	2.61 × 10^5	1 : 2	0.02–0.85	Ni^2+, Co^2+
Cefixime [33]	Methanol-distilled water medium, pH = 2.6 Na2HPO4-citric acid buffer	352	1.224 × 10^4	2 : 1	0.75–16.50	Cu^2+, Zn^2+, Cd^2+, Ni^2+
2-(2-Quinolylazo)-5-diethylaminobenzoic acid [34]	1.0 mol·L^−1 HCl, 1% cetyl trimethyl-ammonium bromide	625	1.51 × 10^5	1 : 2	0.01–0.6	Co^2+, Ni^2+
Benzyloxybenzaldehydethiosemicarbazone [35]	pH = 5.0, cyclohexanol	365	4.0 × 10^3	1 : 1	5–60	Ni^2+, Cu^2+
4-(2’-Furalidene-imino)-3-methyl-5-mercapto-1,2,4-thiazole [36]	pH = 5.4, n-butanol	410	1.4 × 10^3	1 : 1	17–50	Cu^2+, Cr^+6, Mn^+7, S2O3^2-, CH4N2S
4-(6-Bromo-2-benzothiazolylazo) pyrogallol [37]	Dimethylformamide	580	–	–	0.6–15.0	–
4-(N’-(4-Imino-2-oxo-thiazolidine-5-ylidene)-hydrazino)-benzoic acid	pH = 7.0, universal buffer	450	4.3 × 10^3	1 : 1	0.64–10.64	Pt^4+, Ru^4+, Rh^3+, Ir^4+