| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of simply measuring a pitch without causing much personal difference because a pitch portion extraction method, a turbidity measurement method, an anion amount measurement method or a particle count method by a hemacytometer are used as a measurement method of a pitch, but they cause problems where a component other than a pitch is included in a measurement object, a measurement error due to personal difference is large, and it takes a lot of trouble. SOLUTION: This method can be achieved by using one selected from a paper manufacturing material before paper making, inlet, white water and filtrates of them as a specimen, immersing a hydrophobic film in the specimen to adsorb a pitch thereto, and measuring transmittance/turbidity of the film with the pitch adsorbed thereto. COPYRIGHT: (C)2008,JPO&INPIT
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