System for analyzing the concentration of a number of different

Details System for analyzing the concentration of a number of different System for analyzing the concentration of a number of different

1994-03-17

1996-08-13

Phasge, Arun S.

Chemistry: electrical and wave energy

Apparatus

Electrophoretic or electro-osmotic apparatus

204602, 204603, 204604, 204451, G01N 2726, G01N 27447

Patent

active

055453031

ABSTRACT:
System for analyzing the concentration of a number of different ions in a watery solution, using a capillary zone electrophoresis apparatus comprising a capillary tube extending between an input opening and a detection area and filled with an electrolyte, an input device for injecting a sample of the solution to be analyzed in the input opening of the capillary tube, a voltage source for establishing a voltage gradient along the capillary tube between the input opening and the detection area to evoke a migration of the ions in the same through the capillary tube, and a detector circuit for detecting the ions passing through the capillary tube by measuring the conductivity of the passing fluid. The system comprises furthermore a processor for calculating the ion concentrations, the processor receiving data from the detector circuit and from a further conductivity sensor providing to the processor data representing the total conductivity of the solution from which the sample was taken. By comparing the data from both detectors the calculated ion concentrations can be calibrated.

REFERENCES:
patent: 5223114 (1993-06-01), Zare et al.
patent: 5298139 (1994-03-01), Huang et al.
By X. Huang et al., "On-Column Conductivity Detector for Capillary Zone Electrophoresis", Analytical Chemistry, Dec. 1, 1987, vol. 59, No. 23, pp. 2747-2749.
"Capillary Zone Electrophoresis with Electrochemical Detection in 12.7 .mu.m Diameter Columns", Analytical Chemistry, Sep. 15, 1988, vol. 60, No. 18, pp. 1972-1975.

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