Method for balancing background conductivity for ion chromatogra

Details Method for balancing background conductivity for ion chromatogra Method for balancing background conductivity for ion chromatogra

1986-03-11

1988-06-14

Niebling, John F.

Chemistry: analytical and immunological testing

Measurement of electrical or magnetic property or thermal...

Of a liquid

436161, 436178, 2041823, 204301, 210656, B01D 1508, G01N 3002

Patent

active

047511893

ABSTRACT:
A method of ion chromatography in which the sample passes through a chromatographic column, a suppressor, and a conductivity detector, using a gradient electrolyte eluent. A non-ionic polyhydroxy compound is added with the eluent to the chromatographic column at a concentration inversely related to the concentration of the electrolyte which increases with time. The effluent is passed through a membrane suppressor for the conductivity of the electrolyte. The regenerant stream in the suppressor includes a complexing agent (boric acid) which passes through the membrane into the effluent to form highly ionized complex which counterbalances the increased background conductivity of the electrolyte to stabilize the background conductivity in the conductor.

REFERENCES:
patent: 4500431 (1985-02-01), Miyanaga et al.
patent: 4507390 (1985-03-01), Horiuchi et al.

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