METHOD AND APPARATUS FOR AUTOMATIC ELECTROCHEMICAL ANALYSIS

• US 3,556,950 A
• Filed: 07/15/1966
• Issued: 01/19/1971
• Est. Priority Date: 07/15/1966
• Status: Expired due to Term

• Current Assignee: Dahms Harald
• Original Assignee: Dahms Harald
• Inventors: DAHMS HARALD
• Application Number:
  US04/565,504
• Time in Patent Office: 1,649 Days
• US Class Current: 205/775
• CPC Class Codes: G01N 35/00594 Quality control, including calibration or testing of components of the analyser
• CPC Class Codes: G01N 35/00693 Calibration

Abstract

A METHOD AND APPARATUS FOR AUTOMATICALLY DETECTING A PLURALITY OF UNKNOWN CONSTITUENT CONCENTRATIONS IN A FLUID IS DISCLOSED. APPARATUS CONSISTING OF A REFERENCE ELECTRODE AND A PLURALITY OF OTHER ELECTRODES RESPONSIVE TO THE PREENCE OF IONS AND DISSOLVED GASES SUCH AS CALCIUM, CHLORINE, HYDROGEN, POTASSIUM, SODIUM, OXYGEN, AND CARBON DIOXIDE ARE UTILIZED. THE APPARATUS IS CALIBRATED IN SITU BY IMMERSING THE ELECTRODES IN AT LEAST TWO STANDARD SOLUTIONS WHICH CONTAIN DIFFERENT KNOWN CONCENTRATIONS OF THE IONS AND DISSOLVED GASES. AFTER CALIBRATIONS, A SAMPLE OF FLUID CONTAINING UNKNOWN CONCENTRATION OF IONS AND DISSOLVED GASES IS INTRODUCED INTO THE SYSTEM. THE ELECTRICAL OUTPUTS OF EACH OF THE ELECTRODES RELATIVE TO THE REFERENCE ELECTRODE ARE SEQUENTIALLY OBTAINED. DURING CALIBRATION, THE ION DETECTION SURFACE OF SILVER CHLORIDE OF THE CHLORIDE ELECTRODE IS REJUVENATED IN SITU TO PREVENT INACCURACY DUE TO SURFACE AGING OF THE SILVER CHLORIDE.

Claims