| 摘要 |
A method of predicting, during the production of paper or paperboard, the concentration of one or several particular volatile organic compound(s) (VOC) which is (are) emitted by the finished pulp, paper or paperboard product, is described. In the method the concentration of one or several particular VOC is determined in the gas/vapor phase emitted by the pulp, paper or paperboard web during production. The determination can be performed with the aid of infrared spectroscopy or thermal description gas chromatography during the production, and the obtained results of the measurement can be compared with the reference values obtained by analyses of the finished pulp, paper or paperboard product for calibration of the method. Preferably the comparison is performed with the aid of a computer. Good correlation between results obtained during production and results obtained for finished product has been established. |
