Electrochemical cell provided with selective electrodes and at least one chemical reactor, for indirect measurement of clinical-chemical parameters

Claim 1

An electrochemical cell for indirect measurement of clinical-chemical parameters of a liquid substance, comprising: a chemical reactor; a first selective electrode means for measuring a clinical-chemical parameter of the liquid substance before the flow of the liquid substance enters into the chemical reactor and again after the liquid substance reverses its flow out of the chemical reactor; a second selective electrode means for being a reference electrode; two distinct internal fluidic path means for allowing passage of the liquid substance so that one part of the liquid substance passes through a first path into contact with the measuring electrode means and the chemical reactor and then reverses its flow back out of contact with the chemical reactor and the measuring electrode means, and another part of the liquid substance passes through a second path into contact with just the reference electrode means; a single tube means for inputting the liquid substance to be measured into the two fluidic path means and for outputting the liquid substance from the two fluidic path means after measurement, said single tube means having two outputs connected to the two fluidic path means; and motor means for reversing flow of the liquid substance in the chemical reactor; whereby two consecutive measurements are carried out on the liquid substance, first, when the liquid substance initially comes into contact with the measuring electrode means, the chemical reactor, and the reference electrode means, and, second, on just part of the liquid substance which has reacted in the chemical reactor when that part of the liquid substance has reversed its flow back into contact with the measuring electrode means, so that the clinical-chemical parameter of the liquid substance can be measured.