Method for determining parameters of a gas-selective electrode
First Claim
1. A method for determining parameters of a characteristic curve of a gas-selective electrode in an automatic liquid analyzing device, the method comprising the following steps:
- rinsing the electrode with an acid, anddetermining a zero point voltage UN present at the electrode during the acid rinsing, wherein a depletion signal is output when the zero point voltage UN reaches a predetermined depletion value.
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Abstract
Gas-selective electrodes in liquid analyzing devices have a characteristic curve K with a linear portion L and a non-linear portion NL. In the non-linear portion NL, the characteristic previously could only be estimated so that determinations of the concentration were rather inexact. According to the present application, the electrode is rinsed with an acid and the zero point voltage UN at the electrode is determined during the rinsing. Using the zero point voltage UN, the non-linear portion NL of the characteristic K is determined with high precision so that even low concentrations c can be determined with great accuracy.
9 Citations
11 Claims
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1. A method for determining parameters of a characteristic curve of a gas-selective electrode in an automatic liquid analyzing device, the method comprising the following steps:
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rinsing the electrode with an acid, and determining a zero point voltage UN present at the electrode during the acid rinsing, wherein a depletion signal is output when the zero point voltage UN reaches a predetermined depletion value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An automatic liquid sample analysis device comprising:
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a gas-selective electrode; a means for rinsing the electrode with an acid; a control processor for determining a characteristic curve K of the gas-selective electrode, the control processor being programmed to; determine a zero point voltage UN present at the gas-selective electrode during an acid rinse; and output a depletion signal in response to the zero point voltage UN reaching a predetermined depletion value. - View Dependent Claims (10, 11)
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Specification