SIMULTANEOUS DETERMINATION OF BIO-INHIBITORS IN SULFITE LIQUOR BY ATTENUATED TOTAL REFLECTION (ATR) ULTRAVIOLET SPECTROSCOPY
This work presents an attenuated total reflection ultraviolet (ATR-UV) spectroscopic method for simultaneously measuring the contents of lignosulfonates and furfural substances in spent liquor during acidic sulfite process of lignocellulose. The ATR-UV spectra of lignosulfonates, furfural and HMF exhibit similar features with the well-known UV absorption spectra. The spectral intensity at 215 nm can be used for determination of lignosulfonates. Dual-wavelength calibration using absorptions at 220 and 286 nm provides more accurate quantification of lignosulfonates and total furfural substances. A simplified tri-wavelength technique was built to determine the individual concentration of furfural and HMF in liquor. The interference of inorganic substances can be ignored as the three calibrations were carried out. This ATR-UV spectroscopic method facilitates the study on kinetic degradation of lignosulfonates during an acidic sulfite process.
attenuated total reflection (ATR) UV spectroscopy acidic sulfite process bio-inhibitors lignosulfonates, furfural
Weiwei Qin Hao Liu Hui Li Xinsheng Chai Shiyu Fu
State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou 510640 China
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
60-64
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）