On-Line Analysis of Alkali, Sulfide, and Dissolved Lignin During Kraft Pulping by Attenuated Total Reflection UV Spectroscopy, 2001 Pulping Conference Proceedings

X. S. Chai, Q. Luo, J. Y. Zhu, J. Li--This study experimentally demonstrated Attenuated Total Reflection (ATR) UV Spectroscopy for rapid and simultaneous determination of EA, sulfide, and dissolved in kraft pulping liquors. A multivariate partial least-square fitting procedure (a commercial software) was employed to obtain the species concentrations from the experimental absorption spectra of the pulping liquor. Good agreements between ATR-UV measurements and reference methods (titration for alkali and sulfide and conventional UV absorption for dissolved lignin) were obtained. The ATR-UV method can be implemented on-line for process control in mill environments.

Author: Chai, X.S., Luo, Q., Zhu, J.Y., Li, J.
On-Line Analysis of Alkali, Sulfide, and Dissolved Lignin Du
On-Line Analysis of Alkali, Sulfide, and Dissolved Lignin During Kraft Pulping by Attenuated Total Reflection UV Spectroscopy, 2001 Pulping Conference Proceedings
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