Analysis of Xanthate

According to Qi-yan Yan [15], two absorption peaks appear in the ultraviolet spectrum of various alkyl xanthates. The absorption peak at 301 pm is mainly responsible for C=S. The absorption peak at 226 pm is responsible for S-H. The extinction coefficients (sm) of various alkyl xanthates at 301 pm are 17,500. 

It was reported that, in addition to 301 and 226 pm, the absorption peak at 380 pm also in the ultraviolet spectmm of alkyl xanthates [6]. The related results are given as follows  

The ultraviolet spectmm of potassium ethyl xanthate under the condition of pH 2.02 and neutral water can be seen from Fig. 6.4. The curve III is the difference between curve I and curve II. The absorption peak at 270 pm is responsible for the undissociated xanthic acid. When xanthate changes into molecule, absorption peak moves to short wavelength direction. And dissociation constant of xanthic acid can be calculated based on this infer. 

According to Lury, xanthate compound extracted by organic solvent can be tested by using spectrophotometry. The adsorption curve of nickel xanthate extracted by toluol at pH 5.2 can be found from Fig. 6.5. As seen in Fig. 6.5, the absorption peak appears at 270 pm. It was also reported that nickel xanthate could be extracted by cyclohexane. And absorption peak appears at 420 pm. 

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Figure 6. In situ analysis of xanthate DM-PPV precursor during heating...

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