Method for operating an analytical apparatus
First Claim
1. A method for operating an analytical apparatus for determining the concentration of an analyte, especially an oxidizable substance, in a sample liquid, comprises the steps of:
- placing the analytical apparatus in a maintenance operation mode;
operating a metering system, which includes a pump, especially a peristaltic pump, and a supply line for metering volume units of a sample liquid from a source via the supply line into a reactor, the temperature inside the reactor being higher than the boiling temperature of the sample liquid, so that said volume units of the sample liquid metered into the reactor transform into the gas phase following entry into the reactor and a carrier gas in flowing through the reactor;
registering at least one measuring transducer signal for detecting the transforming of the volume unit of the sample liquid into the gas phase; and
deriving, with application of the measuring transducer signal a signal correlated with an instantaneous operating state of the metering system, andsaid signal correlated with an instantaneous operating state of the metering system is a status signal, orsaid signal correlated with an instantaneous operating state of the metering system has a signal value, from which a feeding capacity of the metering system or liquid volume supplied in a certain unit of time can be derived, orsaid signal correlated with an instantaneous operating state of the metering system is a signal representing a time span required for transporting sample liquid from the source into the reactor or value derived therefrom, orsaid signal correlated with an instantaneous operating state of the metering system is a signal representing a feed rate of the metering system.
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Accused Products
Abstract
A method for operating an analytical apparatus for determining concentration of an analyte, especially an oxidizable substance, in a sample liquid, comprises the steps of: placing the analytical apparatus in maintenance operation; operating a metering system, which includes a pump, especially a peristaltic pump, and a supply line, for metering single volume units of a sample liquid from a source via the supply line into a reactor, wherein there exists in the reactor a temperature, which is greater than the boiling temperature of the sample liquid, so that a volume unit of the sample liquid metered into the reactor transforms at least partially into the gas phase following entry into the reactor, especially due to heat transfer from contact with a surface within the reactor, especially directly after contact with the surface within the reactor, and wherein a carrier gas is flowing through the reactor; registering at least one measuring transducer signal for detection of the transforming of the volume unit of the sample liquid into the gas phase, and deriving, with application of the measuring transducer signal, a signal correlated with an instantaneous operating state of the metering system.
10 Citations
19 Claims
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1. A method for operating an analytical apparatus for determining the concentration of an analyte, especially an oxidizable substance, in a sample liquid, comprises the steps of:
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placing the analytical apparatus in a maintenance operation mode; operating a metering system, which includes a pump, especially a peristaltic pump, and a supply line for metering volume units of a sample liquid from a source via the supply line into a reactor, the temperature inside the reactor being higher than the boiling temperature of the sample liquid, so that said volume units of the sample liquid metered into the reactor transform into the gas phase following entry into the reactor and a carrier gas in flowing through the reactor; registering at least one measuring transducer signal for detecting the transforming of the volume unit of the sample liquid into the gas phase; and deriving, with application of the measuring transducer signal a signal correlated with an instantaneous operating state of the metering system, and said signal correlated with an instantaneous operating state of the metering system is a status signal, or said signal correlated with an instantaneous operating state of the metering system has a signal value, from which a feeding capacity of the metering system or liquid volume supplied in a certain unit of time can be derived, or said signal correlated with an instantaneous operating state of the metering system is a signal representing a time span required for transporting sample liquid from the source into the reactor or value derived therefrom, or said signal correlated with an instantaneous operating state of the metering system is a signal representing a feed rate of the metering system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for operating an analytical apparatus for determining the concentration of an analyte, especially an oxidizable substance, in a sample liquid, comprises the steps of:
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placing the analytical apparatus in a maintenance operation mode; operating a metering system, which includes a pump, especially a peristaltic pump, and a supply line, for metering volume unit of a sample liquid from a source via the supply line into a reactor, the temperature inside the reactor being higher than the boiling temperature of the sample liquid, so that said volume units of the sample liquid metered into the reactor transforms into the gas phase following entry into the reactor and a carrier gas is flowing through the reactor; registering at least one measuring transducer signal for detecting the transforming of the volume units of the sample liquid into the gas phase; and deriving, with application of the measuring transducer signal, a signal representing an instantaneous operating state of the metering system. - View Dependent Claims (17, 18, 19)
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Specification