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Izvorni znanstveni članak
Stability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination
Hong-Wen Gao
; State Key Laboratory of Pollution Control and Resource Reuse Research, School of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China
Jian-Fu Zhao
; State Key Laboratory of Pollution Control and Resource Reuse Research, School of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China
| Puni tekst: engleski, pdf (111 KB) | str. 1-6 | citiraj | |
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APA 6th Edition Gao, H. i Zhao, J. (2003). Stability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination. Croatica Chemica Acta, 76 (1), 1-6. Preuzeto s https://hrcak.srce.hr/103051 MLA 8th Edition Gao, Hong-Wen i Jian-Fu Zhao. "Stability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination." Croatica Chemica Acta, vol. 76, br. 1, 2003, str. 1-6. https://hrcak.srce.hr/103051. Citirano 06.03.2021. Chicago 17th Edition Gao, Hong-Wen i Jian-Fu Zhao. "Stability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination." Croatica Chemica Acta 76, br. 1 (2003): 1-6. https://hrcak.srce.hr/103051 Harvard Gao, H., i Zhao, J. (2003). 'Stability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination', Croatica Chemica Acta, 76(1), str. 1-6. Preuzeto s: https://hrcak.srce.hr/103051 (Datum pristupa: 06.03.2021.) Vancouver Gao H, Zhao J. Stability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination. Croatica Chemica Acta [Internet]. 2003 [pristupljeno 06.03.2021.];76(1):1-6. Dostupno na: https://hrcak.srce.hr/103051 IEEE H. Gao i J. Zhao, "Stability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination", Croatica Chemica Acta, vol.76, br. 1, str. 1-6, 2003. [Online]. Dostupno na: https://hrcak.srce.hr/103051. [Citirano: 06.03.2021.] |
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Sažetak
A method for selective determination of copper(II) based on the reactions of copper(II) or cobalt(II) with 3-[(o-carboxy-p-nitrobenzene)azo]chromotropic acid (CNBAC) at pH = 11.4 was developed. Results have shown that two complexes, Co(CNBAC)2 and Cu(CNBAC), were formed, whose cumulative stability constants were 5.22 × 109 and 7.61 × 105 dm3 mol–1, respectively, and their molar absorption coefficients were 1.19 × 104 and 2.12 × 104 dm3 mol–1 cm–1 at 610 nm. The competition coordination of CuII and CoII with CNBAC was applied for selective determination of CuII by the spectral correction technique. In the absence of any masking reagent, the recommended method was selective and was applied for quantitative determination of copper(II) in river and waste water samples.
Ključne riječi
competition coordination for selective determination; spectral correction technique; determination of copper(II); stability constants; 3-[(o-carboxy-pnitrobenzene)azo]chromotropic acid
Hrčak ID: 103051
URI
https://hrcak.srce.hr/103051
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