Abstract
A new and very sensitive and selective chromogenic reagent, 2-methylthiophenyldiazoaminoa-zobenzene (MTDAA), was synthesized and studied in detail for the determination of trace mercury(II) in water samples. The method is based on the color reaction between MTDAA and mercury(II). It was found that mercury(II) reacts with MTDAA in Na2B4O7-NaOH buffer solution (pH = 10.0) to form 1 : 2 red complexes; these show maximum absorption at 520 nm. Beer’s law is obeyed in 0–15 µg of mercury(II) in 25 mL of solution. The apparent molar absorptivity of the complex is 1.33 × 105 L/(mol cm); its limit of quantification, limit of detection, and relative standard deviation are 0.75 ng/mL, 0.27 ng/mL, and 1.0%, respectively, giving better sensitivity. The influence of the reaction variables and the effect of interfering ions are reported; most of the metal ions in water samples can be tolerated in considerable amounts. Only a few ions can interfere with the determination of trace mercury(II), but these can be eliminated by prior extraction. The proposed method is sensitive, simple, and rapid. It has been applied to the determination of trace mercury(II) in water samples with satisfactory results.
Similar content being viewed by others
REFERENCES
Yan, S.C., Huaxue Shijie, 1991, vol. 5, no.2, p. 234.
Huang, W.K., The Test and Analysis of Food, Beijing: Chinese Light Industry Press, 1989.
Qvarnstrom, J., Tu, Q., Frech, W., and Ludke, C., Analyst, 2000, vol. 125, no.6, p. 1193.
Golubeva, N., Burtseva, L., and Matishov, G., Sci. Total. Environ., 2003, vol. 306, nos.1–3, p. 3.
Engel, U., Bilgic, A.M., Haase, O., et al., Anal. Chem., 2000, vol. 72, no.1, p. 193.
Stojko, N.Yu., Brainina, Kh.Z., Faller, C., and Henze, G., Anal. Chim. Acta, 1998, vol. 371, nos.2–3, p. 145.
Matsibura, G.S., Ryabushko, O.P., and Pilipenko, A.T., Zh. Anal. Khim., 1983, vol. 38, no.6, p. 1008.
Ment, S.M., Fang, G.Z., and Pan, J.M., Fenxi Shiyanshi, 1999, vol. 18, no.6, p. 1.
Yang, M.H., Tang, G.Q., and Jin, C.M., Fenxi Shiyanshi, 2002, vol. 21, no.2, p. 85.
Liu, Y., Meng, S., Guo, Y., et al., Lihua Jianyan Huaxue Fence, 2002, vol. 38, no.2, p. 61.
Wang, G.H., Le, C.G., and Ying, M., Lihua Jianyan Huaxue Fence, 1998, vol. 34, no.10, p. 452.
Wang, C.C. and Ha, C.Y., Fenxi Huaxue, 1998, vol. 26, no.10, p. 1260.
Chen, J.W., Cao, S.H., and Pan, J.M., Yejin Fenxi, 2002, vol. 22, no.6, p. 1.
Chen, Y.W. and Zhang, H.J., Fenxi Kexue Xuebao, 2000, vol. 16, no.5, p. 410.
Wang, G.H., Le, Z.G., and Yin, M., Lihua Jianyan Huaxue Fence, 1998, vol. 34, no.10, p. 452.
Lu, J.Q., Yang, M.H., Gong, C.R., et al., Fenxi Kexue Xuebao, 1997, vol. 13, no.3, p. 237.
Wang, G.H., Le, Z.G., and Yin, M., Fenxi Kexue Xuebao, 1995, vol. 11, no.2, p. 21.
Feng, Y.L., Fenxi Huaxue, 2000, vol. 28, no.3, p. 311.
Xu, B., Wu, Y.W., and Zou, X.P., Fenxi Shiyanshi, 1995, vol. 14, no.4, p. 30.
Yang, M.H., Zheng, Y.F., and Zhao, G.D., Guangdong Weiliang Yuansu Kexue, 2001, vol. 8, no.4, p. 56.
Sun, P.P., Wi, B.C., and Liu, H.C., J. East China Normal Univ. (Natural Science), 1994, vol. 4, no.4, p. 60.
Jin, C.M., Gong, C.R., and Yang, M.H., Fenxi Shiyanshi, 1998, vol. 17, no.5, p. 21.
Author information
Authors and Affiliations
Additional information
__________
From Zhurnal Analiticheskoi Khimii, Vol. 60, No. 7, 2005, pp. 703–706.
Original English Text Copyright © 2005 by Guo, Din, Tian, Liu, Chang, Meng.
The text was submitted by the authors in English.
Rights and permissions
About this article
Cite this article
Guo, Y., Din, B., Tian, M. et al. The Color Reaction of Mercury(II) with the New Reagent 2-Methylthiophenyldiazoaminoazobenzene and Its Application. J Anal Chem 60, 625–628 (2005). https://doi.org/10.1007/s10809-005-0149-z
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/s10809-005-0149-z