New high-selective and sensitive extraction-photometric method for determination of cobalt

  • Iryna V. Kachanovich Assay State Laboratory of Republican Unitary Scientific and Production Enterprise «Unidragmet BGU», Kurchatov street, 1, 220108, Minsk
  • Uladzimir V. Yagorau Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk, Research Institute for Physical Chemical Problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk
  • Yauheni M. Rakhmanko Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

Abstract

Anion-exchange extraction of thiocyanate complexes of zinc, cobalt(II), copper(II), cadmium, mercury(II), nickel with N,N-didecyl-N-[2-(didecylamino)ethyl]-decan-1-aminium picrate in different solvents has been investigated. Toluene, decane, octane, chloroform and carbon tetrachloride were used as solvents. The conditional exchange constants of picrate and thiocyanate ions to thiocyanate complexes of mentioned above metals are obtained. It is found that decane and octane are the best solvents for the extraction of cobalt(II) thiocyanate complexes. The simple high-sensitive and express method for determination of cobalt(II) has been proposed. The method is based on quantitative extraction of cobalt(II) from 0.1 mol /l thiocyanate background solution and measuring the extract absorbance at either 630 or 325 nm. 100-fold preconcentration is possible. The range of cobalt(II) concentration to be determined is 0.1– 4.0 ppm without pre-concentration and 1.0 – 40.0 ppb with pre-concentration. The determination error is not more than 3 % rel. without pre-concentration and not more than 12 % rel. with pre-concentration. 1000-fold excess of nickel, cadmium, manganese(II), lead(II), chrome(III), ferrum(II), as well as magnesium, calcium, barium, potassium, sodium, lithium does not affect cobalt determination.

Author Biographies

Iryna V. Kachanovich, Assay State Laboratory of Republican Unitary Scientific and Production Enterprise «Unidragmet BGU», Kurchatov street, 1, 220108, Minsk

chemical engineer

Uladzimir V. Yagorau, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk, Research Institute for Physical Chemical Problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

doctor of science (chemistry), full professor; professor at the department of analytical chemistry, faculty of chemistry of the Belarusian State University, head of the laboratory of ionometry and chemical metrology of the Research Institute for Physical Chemical Problems of the Belarusian State University

Yauheni M. Rakhmanko, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

doctor of science (chemistry), full professor; head of the department of analytical chemistry, faculty of chemistry

References

  1. Kogan V. Yu., Petukhova N. E. Kobalʼt. Programma OON po okruzhayushchei srede [Cobalt. United Nations Environmental Programme]. Ed. by N. F. Izmerova. Mosc., 1986 (in Russ.).
  2. Perelʼman F. M., Zvorykin A. Ya. Kobalʼt i nikelʼ [Cobalt and nickel]. Mosc., 1975 (in Russ.).
  3. Pyatnitskii I. V. Analiticheskaya khimiya elementov. Kobalʼt [Analytical Chemistry of Elements. Cobalt]. Mosc., 1965 (in Russ.).
  4. Kamburowa M., Alexandrov A. The determination of cobalt in soils by means of thiazolylblue tetrazolium bromide. Anal. Chem. 1998. Vol. 43, No. 6. P. 1021–1026.
  5. Chikhalikar S., Patel K. S. Extractive spectrophotometric determination of cobalt. Anal. Chem. 1998. Vol. 43, No. 2. P. 209 –214.
  6. Denisova S. A., Lesnov A. E., Petrov B. I. Ekstraktsionno-fotometricheskoe opredelenie ionov zheleza i kobalʼta s ispolʼzovaniem sistemy voda – diantipirilmetan – naftalin-2-sulʼfokislota – tiotsianat-ion [Extraction-photometric determination of ferrum and cobalt ions with the use of system aqua – diantipyrylmethane – naphthalene-2-sulphonic acid – thiocyanate ion]. Analitika Sibiri i Dalʼnego Vostoka – 2004 : tez. dokladov sedʼmoi konferentsii (Novosibirsk, 11–16 Oct., 2004). Novosibirsk, 2004. Vol. 1. P. 214 (in Russ.).
  7. Aggarwal S. G., Patel K. S. Flow injection analysis of zinc and cobalt in beverages, biological, environmental and pharmaceutical samples. Fresenins’ J. Anal. Chem. 1998. Vol. 362, No. 7/8. P. 571–576.
  8. Rakhmanʼko E. M., Kachanovich I. V., Tʼyu Van Bien. Anionoobmennaya ekstraktsiya rodanidnykh kompleksov tsinka solyami DDAE-b-TDA iz neitralʼnykh sred [Anion-exchange extraction of zinc thiocyanate complexes with salts of DDAE-b-ТDА from the neutral solutions]. Zhurn. neorg. khim. 1991. Vol. 35, No. 9. P. 2454 –2457 (in Russ.).
  9. Rakhmanʼko E. M. Fiziko-khimicheskie osnovy primeneniya ekstraktsii solyami vysshikh chetvertichnykh ammonievykh osnovanii v analize [Phisical Chemical Fundamentals for the Application of Extraction with High Quaternary Aminium Salts in Analysis] : dissertatsiya… doktora khim. nauk : 02.00.04 ; 02.00.02. Minsk, 1994 (in Russ.).
  10. Polishchuk S. V., Rakhmanʼko E. M., Starobinets G. L. Soli dialkilaminoetil-b-trialkilammoniya – novye ekstragenty metallov [Dialkylaminoethyl-b-trialkylaminium salts as new extragents of metals]. Dokl. AN BSSR. 1987. Vol. 31, No. 7. P. 640 – 643 (in Russ.).
  11. Starobinets G. L., Rakhmanʼko Е. М., Lestchov S. M., et al. Sposob ochistki solei vysshikh chetvertichnykh ammonievykh osnovanii, soderzhashchikh ot 20 do 50 atomov ugleroda : a. c. SU 702003 [Inventors Certificate 702003 USSR. The purifying method for high quaternary aminium bases contained from 20 to 50 carbon atoms]. Publ. 05.12.1979 (in Russ.).
  12. Starobinets G. L., Rakhmanʼko E. M., Soroka Zh. S. Primenenie kislotnykh krasitelei dlya opredeleniya konstant anionoobmennykh ekstraktsionnykh ravnovesii [The use of acid dyes for the determination of anion-exchange extraction equilibriums constants]. Zhurn. neorg. khim. 1978. Vol. 23, No. 6. P. 1628–1631 (in Russ.).
  13. Rakhmanʼko E. M., Gulevich A. L., Starobinets G. L. Metod opredeleniya konstant anionoobmennoi ekstraktsii vysokogidrofobnykh anionov solyami chetvertichnykh ammonievykh osnovanii [The method for the determination of anion-exchange extraction constants for highly hydrophobic anions with quaternary aminium salts]. Dokl. AN BSSR. 1980. Vol. 24, No. 11. P. 1015–1017 (in Russ.).
Published
2017-11-29
How to Cite
Kachanovich, I. V., Yagorau, U. V., & Rakhmanko, Y. M. (2017). New high-selective and sensitive extraction-photometric method for determination of cobalt. Journal of the Belarusian State University. Chemistry, 1, 31-42. Retrieved from https://journals.bsu.by/index.php/chemistry/article/view/1155
Issue
No 1 (2017): Journal of the Belarusian State University. Chemistry
Section
Original Articles

The authors who are published in this journal agree to the following:

  1. The authors retain copyright on the work and provide the journal with the right of first publication of the work on condition of license Creative Commons Attribution-NonCommercial. 4.0 International (CC BY-NC 4.0).
  2. The authors retain the right to enter into certain contractual agreements relating to the non-exclusive distribution of the published version of the work (e.g. post it on the institutional repository, publication in the book), with the reference to its original publication in this journal.
  3. The authors have the right to post their work on the Internet (e.g. on the institutional store or personal website) prior to and during the review process, conducted by the journal, as this may lead to a productive discussion and a large number of references to this work. (See The Effect of Open Access.)