Gas-liquid analyzer

Claim 1

A gas-liquid analyzer comprising: a bath; electrolyte filling up said bath; a reference electrode immersed in said electrolyte; a potentiometer having first and second inputs and outputs, the first input thereof being connected to said reference electrode; a switching unit having a first group of inputs, a second group of inputs, first, second, third and fourth outputs, said first output thereof being connected to said second input of said potentiometer; a potential corrector having first and second inputs, said first and second inputs thereof being connected with said output of said potentiometer and said second output of said switching unit, respectively; a sample conveying assembly; a capillary tube of said sample conveying assembly having a wall, an inlet end, and an outlet end, the capillary tube being arranged to overlie said bath; the capillary tube further comprising first and second rows of openings arranged in opposition in said wall; a group of porous inserts of said sample conveying assembly located in said openings of said first row of openings and adapted to intimately contact said electrolyte; a sample displacement means of said sample conveying assembly, the sample displacement means being disposed in close proximity to said outlet end of said capillary tube and connected with said third and fourth outputs of said switching unit; a group of ion-selective electrodes equal in number to the number of said porous inserts and hermetically secured in said openings of said second row of openings, each of the electrodes being connected to one of said inputs of said first group of inputs of said switching unit; said sample under analysis which is introduced into said inlet end of said capillary tube adapted during displacement thereof to alternately contact with one of said ion-selective electrodes and one of said porous inserts positioned to face such ion-selective electrode.