Separation and determination of metals as complexes of 1-nitroso-2-naphthol-6-sulphonic and 2-nitroso-1-naphthol-6-sulphonic acids
Tóm tắt
A sensitive ion-pair liquid-liquid extraction-spectrophotometric method has been developed for the determination of copper, palladium, iron and cobalt, based on the formation of metal complexes with 1-nitroso-2-naphthol-6-sulphonic acid or 2-nitroso-1-naphthol-6-sulphonic acid as primary ligand, and zephiramine as counter-ion. The coloured metal complexes obtained over different pH ranges are easily and quantitatively extracted into dichloromethane. The method has been tested with samples containing known amounts of copper, palladium, iron and cobalt in ultrapure water. The reagents provide a sensitive spectrophotometric method for determining these metals.
Tài liệu tham khảo
M. Ziegler, O. Glemser,Angew. Chem. 1956,68, 620.
M. Ziegler, O. Glemser, N. Petri,Z. Anal. Chem. 1956,153, 415.
W. Hüchel,Theoretical Principals of Organic Chemistry, Elsevier, Amsterdam, 1955.
S. Motomizu, K. Tôei,Anal. Chim. Acta 1977,89, 167;1978,97, 335.
T. Korenaga, S. Motomizu, K. Tôei,Anal. Chim. Acta 1973,65, 335;Talanta 1974, 21, 645.
S. Sato, S. Uchikawa,Talanta 1986,33, 115.
A. Morales, M. I. Toral,Analyst 1985,110, 1445.
T. Sekine, Y. Hasegawa,Solvent Extraction Chemistry, Dekker, New York, 1977, p. 382.
K. Tôei, S. Motomizu, H. Yokosu,Anal. Chim. Acta 1979,110, 329.
R. M. Diamond,J. Phys. Chem. 1963,67, 2513.
O. Mäkitie, H. Saarinen,Anal. Chim. Acta 1969,46, 314.
O. Mäkitie, H. Saarinen, R. Rauhamäki,Suomen Kemistil. B 1973,46, 116.
O. Mäkitie, H. Saarinen, H. Mattinen, K. Seppovaara,Suomen Kemistil. B 1970,43, 340.
H. M. M. Sirén, M. M. Shapi,Therm. Chim. Acta 1986,102, 239.
R. G. Bates, G. D. Pinching, E. R. Smith,J. Res. Nat. Bur. Stds. 1950,45, 418.
D. J. Leggett, W. A. E. McBryde,Anal. Chem. 1975,47, 1065.
A. Flieger, S. Przeszlakowski,Talanta 1985,32, 1141.
P. Job,Ann. Chim. Paris 1928,9, 113; Y. Anjaneyulu, N. Suguna, M. R. P. Reddy, K. Chandrasekhar,Analusis 1986,14, 200.
K. Tôei, S. Motomizu, T. Korenaga,Analyst 1975,100, 629.
S. Shibata, M. Furukawa, E. Kamata, K. Goto,Anal. Chim. Acta 1970,50, 439.
S. Shibata, K. Goto, E. Kamata,Anal. Chim. Acta 1969,45, 279.
K. V. Reddy, A. Paul,Indian J. Chem. 1984,23 A, 703.
K. Tôei, S. Motomizu, S. Hamada,Anal. Chim. Acta 1978,101, 169.
Z. Marczenko,Spectrophotometric Determination of Elements, 2nd Ed., Ellis Horwood, Chichester, 1986.
S. Shibata, in:Chelates in Analytical Chemistry, Vol. 4 (H. A. Flaschka, A. J. Barnard, Jr., eds.), Dekker, New York, 1972.
H. M. M. Sirén, M.-L. Riekkola,Symposium on Inorganic and Analytical Chemistry, Abstracts, Joensuu, May 1986, Finland.