Simple photometric determination of free cyanide ion in aqueous solution with 2,6-dichlorophenolindophenol

• Autorzy: Abdollah Yari , Kazem Kargosha
• Języki publikacji: EN

Abstrakty

EN

In this work, a simple photometric method with high accuracy and precision for measuring trace amounts of free cyanide ion in aqueous solution is demonstrated. Under the evaluated conditions, we could determine CN− concentration in the range of 5–70 ppm easily. The work is based upon the photometric titration of CN− with Co(II) in the presence of 2,6-dichlorophenolindophenol (DCPIP) at λmax = 602 nm in aqueous solution. The optimal conditions, such as pH, ionic strength, and concentration of chromopher were evaluated. The interence effect of many other cations and anions studied and the results are given here. The optimized titration was successfully used to determine the concentration of free cyanide ion in aqueous solutions.

Słowa kluczowe

EN

Cyanide; 2,6-dichlorophenolindophenol; spectrophotometry

• Czasopismo: Open Chemistry
• Rocznik: 2006
• Tom: 4
• Numer: 2
• Strony: 329-337

Daty

wydano

2006-06-01

online

2006-06-01

Twórcy

autor

Abdollah Yari

• Department of Chemistry, Lorestan University, Khorramabad, Iran,

autor

Kazem Kargosha

• Iranian Center of Chemical & Chemical Engineering Research, Tehran, Iran

Bibliografia

• [1] J.J. Rosentreter and R.K. Skogerboe: “Trace determination and speciation of cyanide ion by atomic absorption spectroscopy”, Anal. Chem., Vol. 63, (1991), pp. 682–688. http://dx.doi.org/10.1021/ac00007a007[Crossref]
• [2] Encyclopedia of Chemical Technology, Vol. 7, John Wiley & Sons, 1979, pp. 307–334.
• [3] Encyclopedia of Chemical Technology, Vol. 11, John Wiley & Sons, 1980, p. 973.
• [4] J.C.L. Meeussen, M.G. Keizer and W.D. Lukasen: “Determination of total and free cyanide in water after distillation”, Analyst, Vol. 117, (1992), pp. 1009–1012. http://dx.doi.org/10.1039/an9921701009[Crossref]
• [5] W.F. Sheng, H. Bai and S.N. Kai: “Application of the Copper-Cadion 2B-Triton X-100 system to the spectrophotometric determination of micro-amounts of cyanide in waste water”, Analyst, Vol. 109, (1984), pp. 167–169.
• [6] S. Chattaraj and A.K. Das: “Indirect determination of free cyanide in industrial waste effluent by atomic absorption spectrometry”, Analyst, Vol. 116, (1991), pp. 739–741. http://dx.doi.org/10.1039/an9911600739[Crossref]
• [7] T. Pal, A. Ganguly and D.S. Maity: “Determination of cyanide based upon its reaction with colloidal silver in the presence of oxygen”, Anal. Chem., Vol. 58, (1986), pp. 1564–1566. http://dx.doi.org/10.1021/ac00298a066[Crossref]
• [8] C.N. Konidari, S.M. Tzouwara, L.E. Bowman and M.I. Karayannis: “Kinetic and mechanistic study of the reaction of 2,6-dichlorophenol-indophenol and cysteine”, Talanta, Vol. 39, (1992), pp. 863–868. http://dx.doi.org/10.1016/0039-9140(92)80107-O[Crossref]
• [9] M.I. Karayannis: “Kinetic determination of ascorbic acid by the 2,6-dichlorophenolindophenol reaction with a stopped-flow technique”, Anal. Chim. Acta, Vol. 76, (1975), pp. 121–130. http://dx.doi.org/10.1016/S0003-2670(01)81993-0[Crossref]
• [10] J. Polsteo and H. Lachman: Spectrometric Titrations, VCH Pub. Germany, VCH, Newyork, 1989, Chapt. 1.
• [11] E. Bishop: Indicators, Pergamon Press, 1972, pp. 469–487.
• [12] R.K. Tiwari and K.K. Mishara, Indian J. Chem., Vol. 30A, (1991), p. 140.
• [13] M.I. Karayannis and P.A. Siskos: “Stopped-flow kinetic studies of the coupled dichlorophenol indophenol-nicotinamide adenine dinucleotide reaction”, Anal. Chim. Acta, Vol. 136, (1982), pp. 339–346. http://dx.doi.org/10.1016/S0003-2670(01)95394-2[Crossref]
• [14] R.A. Patrik and G. Svehla: “Spectrophotometric and potentiometric study of the acid-base equilibria of indophenols in aqueous media”, Anal. Chim. Acta, Vol. 88, (1977), pp. 363–370.
• [15] G. Svehla, L. Koltai and L. Erdey: “The use of 2,6-dichlorophenol-indophenol as indicator in iodometric titrations with ascorbic acid”, Anal. Chim. Acta, Vol. 29, (1963), pp. 442–447.
• [16] B.P. Sinha and R.K. Bhatnagar, Indian J. Chem., Vol. 16A, (1978), p. 424.
• [17] G. Charlot: Les Reactions Chemiques on Solution, 16th ed., Masson, Paris, 1969.
• [18] Snel-Ettre: Encyclopedia of Industrial Chemical Analysis, Vol. 14, John Willy & Sons, New York.

Identyfikatory

DOI

10.2478/s11532-006-0007-3