公开(公告)号：JPS62105041A

公开(公告)日：1987-05-15

申请号：JP24603785

申请日：1985-10-31

Applicant: TOA ELECTRONICS

Inventor： FUJIWARA SHIZUO ,  MOTOHASHI RYOICHI ,  YAMASATO MASAHARU

IPC: G01N33/34 ,  G01N27/416

Abstract: PURPOSE:To make measurement in a stable moist state by allowing paper to be measured to contact a flat glass film having a measuring electrode, disposing upper and lower blocks each having a through-hole to face each other via an O-ring and measuring the pH of the moistened paper. CONSTITUTION:A fibrous material such as cotton 15 is held on the inside of the glass film 12of the composite glass electrode 6 so that foam is not generated near the film 12. A liquid junction part 13 is provided to the top end of an outside peripheral glass tube enclosing a reference electrode 11 by lapping and fitting the measuring electrode 10 and the periphery at the top end of the glass film 12 which is the partition wall of the electrode 11 to connect the internal liquid 9 of the electrode 11 to an internal liquid tank 19 on the outside. A head pressure is exerted to the liquid junction part 13 to gradually discharge the liquid 9 to the outside. The paper 5 to be measured is placed on the lower block 2 and the upper block 1 is placed thereon. The blocks 1, 2 are fixed via the O-ring 4. The film 12 of the electrode 6 contacts the rear surface of the paper 5 in this state and pure water, etc., are dropped from the through-hole 3 of the block 1 to moisten the paper 5, then the pH thereof is measured. The measurement is thus made in the stable moist state.

公开(公告)号：JPS62161054A

公开(公告)日：1987-07-17

申请号：JP224886

申请日：1986-01-10

Applicant: FUJIWARA SHIZUO ,  TOA ELECTRONICS

Inventor： FUJIWARA SHIZUO ,  MOTOHASHI RYOICHI ,  YAMASATO MASAHARU

IPC: G01N33/34 ,  G01N27/416

Abstract: PURPOSE:To make it possible to accurately and simple measure the inherent acidified state of paper, by holding paper of which pH must be measured between an upper side block and a lower side block through an O-ring and surrounding the paper within the O-ring by upper and lower side blocks. CONSTITUTION:Paper 1 of which pH must be measured is held between a upper side block 2 and a lower side block 3 through an O-ring 6. Further, the block 3 having a recessed part 5 is fixed in opposed relation to the block 2 and a bottomed hole is formed inside both blocks. Furthermore, a non-aqueous solvent 7 is dripped on the paper held between both blocks 2, 3 from above and passes through the paper to be accumulated in the bottomed hole. The non-aqueous solvent 7 in the bottomed hole is contacted with the paper 1 and the pH of the non-aqueous solvent 7 extracting an acidic component from the paper 1 is measured. By this method, the inherent acidified state of the paper 1 can be measured accurately and simply without destructing the paper 1.