Determination of Thiocyanate in Desulfurization Waste Solution by Spectrophotometry

Abstract:

Affects of thiosulfate (S₂O₃^2-) and sulfate (SO₄^2-) on determination of thiocyanate (SCN^-) in desulfurization waste solution (DWS) by spectrophotometry were investigated. The experiment results suggested that S₂O₃^2- and Fe3+ generated purple compound [Fe(S₂O₃)₂]^- which has a strong absorption at 450nm, but the purple soon fades in this process. As long as the reacting time is longer than 120s, the impact of S₂O₃^2- can be eliminated. In addition, sulfate has no effect. At 450nm wavelength, linear relationship between concentration of SCN^- and absorbance was C=19.7272A-0.2774, which conformed to the Beer Law in the range of 2.00 ~ 19.45μg•ml^-1, the correlation coefficients was 0.9996. The Fe³⁺-SCN^- spectrophotometric method of monitoring SCN- in desulfurization waste solution was feasible.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 209-212
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.209
• Online since: January 2013
• Authors: Zhen Zhen Li, Guo Qiang Li, Yong Fa Zhang, Lin Wang, Yu Liang Shi, Ya Zhen Wang
• Keywords: Desulfurization Waste Solution, Spectrophotometry, Thiocyanate, Thiosulfate

References

[1] MICHIGAMIY. FUJIIK. Analyst. 117. 12 (1992): 1855~1858.

[2] YE Mingli, HU Zhongyang, PAN Guangwen. Chin. J. Anal. Chem. 2011, 39(11): 1762~1765.

[3] HE Shumei, CHEN Xiaoyan. J. Hebei Norm. Univ., Nat. Sci. Ed. 1999, 23(3): 388~392.

[4] Alireza Nezamzadeh-Ejhieh, Atefeh Badri. Desalination. 2011, 281; 248~256.

[5] J. Kurzawa, K. Janowicz, A. Suszka. Analytica Chimica Acta. 2001, 431; 149~155.

DOI: 10.1016/s0003-2670(00)01240-x

[6] Carolina Cecilia Acebal, Hana Sklenářová, Jana Škrlíková, etc. Talanta. 2012, 96(15): 107~112.

[7] Liu Jianjun, Li Jianfen, Zhou Hanfen. J. Wuhan Polytech. Univ. 2009, 28(4); 60~62.