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Spectrophotometric Determination of Cobalt, Nickel and Palladium after Extraction with Thioxanthate into Molten Naphthalene
Author(s) -
Puri B. K.,
Sethi C. L.,
Kumar Ashok
Publication year - 1982
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198200029
Subject(s) - cobalt , palladium , chemistry , nickel , naphthalene , extraction (chemistry) , analytical chemistry (journal) , nuclear chemistry , inorganic chemistry , chromatography , catalysis , organic chemistry
Cobalt, nickel and palladium have been extracted with thioxanthate into molten naphthalene (85–90° C ). Various parameters involved in the extraction have been studied and composition of the extracted complex established in each case. Cobalt. nickel and palladium thioxanthates are extracted in the p H range, Co: 5.0–9.5. Ni: 3.9–7.4 and Pd: 2.0–9.5 and can be determined spectrophotometrically at 390. 500 and 345 nm respectively. The molar absorptivities are calculated to be Co: 6.187×10 3 ℓ mol −1 cm −1 , Ni: 8.8×10 3 ℓ mol −1 cm −1 and Pd: 1.16×10 4 ℓ mol −1 cm −1 with sensitivities in terms of Sandell's defication are; 0.0095 μ g Co/ cm 2 at 390 nm , 0.0060 μ g Ni/ cm 2 at 500 nm and 0.0091 μ g Pd/ cm 2 at 345 nm respectively. These conditions have been utilized for the determination of these metals in alloys and also for the simultaneous determination of cobalt and nickel in an alloy.