Quantitative Analysis of Several Common Anions in Salt Solutions Using Laser Raman Spectrometer

Several commonanions,including CO₃^2-、SO₄^2-、HSO₄^-、HCO₃^-,and NO₃^-,with known concentrations in their sodium solutions,were analyzed by Renishaw inV ia laser Raman spectrometer for their Raman characteristic peaks and water bands.The quantitative relation ships between Raman spectrum parameters(area integrations of their in tensity)and their concentrations were built.in addition,we proposed the method to determine concentrations of CO₃^2-、SO₄^2-、HSO₄^-、HCO₃^-,and NO₃^- in fluid inclusions by measuring their Raman spectrum parameters(area integrations of in tensity).However,for anions that are pronetoionize in water,like HSO₄^- and HCO₃^-,we adopt their net concen trations in water for working curve fitting.Furthe rmore,the advantage of this method and the difficulty and perspective of quantitative analysis for Cl^- in aqueous solution were discussed.