title: Determination of thiocyanate in the vacuum carbonate desulfurization wastewater.
abstract: In acidic solution, thiocyanate molecules reacted with ferric ions to produce red complexes. The concentration of thiocyanate could be determined by spectrophotometer. The effects of wavelength, volume of color reagent, acidity and color time on absorbance were investigated. The interferences of co-existing ion were discussed as well. Results showed that the relation between absorbance and the concentration of thiocyanate was in accord with Beer's law when the concentration of thiocyanate was 2-20 mg/L. The linear regression equation was Absorbance = 0.0523Concentration-0.0156, with a linear correlation coefficient of 0.9997. The average recovery rates of two kinds of vacuum carbonate desulfurization wastewater were 100.95% and 99.62%, and relative standard deviations were 0.79% and 0.14% respectively. It shows that the method was quick, high precision, accurate and easy to handle.
authors: School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China.
authors: Luyuan
authors: L
authors: Wang
authors: School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China. Electronic address: dong_lin@163.com.
authors: Lin
authors: L
authors: Dong
authors: School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China.
authors: Wenhui
authors: W
authors: Song
mesh_terms: D065966:Absorption, Physicochemical; D000143:Acids / Q000737:chemistry; D002254:Carbonates / Q000737:chemistry; D003116:Color; D005290:Ferric Compounds / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007477:Ions; D009566:Nitrates / Q000032:analysis; D012015:Reference Standards; D013455:Sulfur / Q000737:chemistry; D013861:Thiocyanates / Q000032:analysis; D013997:Time Factors; D014618:Vacuum; D062065:Wastewater / Q000737:chemistry
chemical_list: D000143:Acids; D002254:Carbonates; D005290:Ferric Compounds; D007202:Indicators and Reagents; D007477:Ions; D009566:Nitrates; D013455:Sulfur; D013861:Thiocyanates; D062065:Wastewater; C025302:ferric nitrate; C031760:thiocyanate
keywords: desulfurization wastewater; spectrophotometry; thiocyanate