Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Reexamination Certificate
2006-09-12
2006-09-12
Hopkins, Robert A. (Department: 1724)
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
C210S745000, C210S746000, C210S749000, C210S143000, C210S198100
Reexamination Certificate
active
07105095
ABSTRACT:
A water-soluble lithium salt is added as a tracer substance along with a water treatment chemical to water to be treated. The concentration of lithium ions is electrochemically or optically measured using a lithium ion sensitive substance, so as to perform concentration control of the water treatment chemical added to water to be treated. An ion selective electrode, ion selective field effect transistor, or ion optode may be employed to perform the electrochemical or optical measurement using a lithium ion sensitive substance.
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Kazahiko Watanabe et al. “Lithium Ion Selective Optical Sensor Based on a Novel Neutral Ionophore and a Lipophilic Anionic Dye” Anal Chem. 1993, 65, 2704-2710.
Koji Suzuki et al, “Design and Synthesis of Highly Selective Ionophores for Lithium on Based on 14-Crown-4 Derivatives for an Ion-Selective Electrode” Anal Chem. 1993, 65, 3404-3410.
English Abstract of Publication No. 2-115697 (1 page).
English Abstract of Publication No. 2001-334255 (1 page).
English Abstract of Publication No. 4-296651 (1 page).
English Abstract of Publication No. 4-296652 (1 page).
English Abstract of Publication No. 51-111388 (1 page).
English Abstract of Publication No. 6-73045 (1 page).
English Abstract of Publication No. 2001-4585 (1 page).
Wake Toshiharu
Yamamura Kiyotaka
Yano Daisaku
Yoshikawa Hiro
Hopkins Robert A.
Organo Corporation
Osha & Liang LLP
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