Patent ID: 9029776
Filing Date: 2015-05-12
Classification: D21H,G01N

Abstract:
1. A method of determining an amount of starch used in surface-sizing a cellulose product, comprising: determining the amount of starch with a transmission method utilizing IR spectroscopy in such a way that a first absorption value is measured before adding starch, a second absorption value is measured after having added starch, and the amount of starch is determined from the difference between said absorption values, wherein: the first absorption value is used to determine a first amount of cellulose based on absorption of infrared radiation by the cellulose product at an absorption wavelength range of cellulose and starch, the second absorption value is used to determine a second amount of cellulose and starch based on absorption of infrared radiation by the cellulose product at the absorption wavelength range of cellulose and starch, and the amount of starch is determined from the difference between the first amount of cellulose and the second amount of cellulose and starch.