PROCEDURE AND APPARATUS FOR DETERMINING THE RESIN SUBSTANCE CONTENT OF A PULP STOCK SAMPLE

摘要

The present invention concerns a procedure for determining the pitch substance content of a pulp slurry sample, wherein (a) from part of the pulp slurry sample are separated, with the aid of a separator means based on specific gravity, the wood fibres and other solids, if any, except for the pitch substances, in order to obtain a sample proper; (b) from part of the pulp slurry sample are separated, with the aid of a separator means based on particle size, the pitch substances and wood fibres which may be present, and other solids, in order to obtain a reference sample; and (c) the pitch matter content of the sample is determined by measurement on the sample proper thus obtained, using the reference sample for reference. The invention further concerns apparatus for implementing the procedure, said apparatus comprising (a) a separating means based on specific gravity for preparing a sample proper, said separating means separating from part of the pulp slurry sample the wood fibres and solids, if any, excepting pitch substances; (b) a separating means based on particle size for preparing a reference sample, said separating means separating from part of the pulp slurry sample the pitch substances and wood fibres and solids which may be present; (c) a measuring means for measuring the sample proper and the reference sample in order to determine the pitch matter content of the sample.