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Method and apparatus for controlling concentration of water treatment chemicals

  • US 7,105,095 B2
  • Filed: 04/16/2004
  • Issued: 09/12/2006
  • Est. Priority Date: 04/17/2003
  • Status: Expired due to Fees
First Claim
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1. A method for controlling concentration of a water treatment chemical, comprisingadding a water-soluble lithium salt as a tracer substance along with the water treatment chemical to water to be treated;

  • electrochemically or optically measuring concentration of lithium ions using a lithium ion sensitive substance; and

    using the measured lithium ion concentration to control the concentration of the water treatment chemical added to the water to be treated.

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