The method for determination of mass concentrations of OX (total chlorine) and OOX (organically bound chlorine) in pulp, paper and cardboard has been developed on the basis of the ISO 11480 standard and has been certified in the Russian national standard system GOST R 8. 563. The method can be applied for assessment of ecological efficiency of the bleached pulp production technology, which assumes minimization of organochlorine substances concentration in bleached products.

In accordance with the proposed method, a fiber material sample is burnt in an oxygen flow at 9500℃ and chloride-ions thus formed are detected microcoulometrically. The method is intended for controlling the amount of organochlorine substances in bleached pulp, paper and cardboard products, which determines the ecological efficiency of the pulp bleaching process; for providing chemical safety of bleached pulp production in accordance with the national law “On Technology Process Regulation”; and for improving the competitive advantages of the bleached products in the markets worldwide.