Endress+hauser Conducta Gmbh+co. Kg

Endress+hauser Conducta Gesellschaft Fur Mess- Und Regeltechnik Mbh+co. Kg

Endress+hauserse+co. Kg

Endress+conducta Gmbh+co. Kg

Endress + Hauser Conducta Gesellschaft Für- Und Regeltechnik Mbh + Co. Kg

Ulrich Kathe

Daniel Schweitzer

Ralf Steuerwald

Thomas Schipolowski

Anja Gerlinger

Michael Ingelmann

Oliver Bettmann

Ulrich Rottensteiner

Tobias Zachmann

Andrea Gross

Thomas Baumgartner

Christian Hirn

Ralf Bernhard

Matthias Knopp

Kristoff Kley

Lydia Hoppe

Michael Oprea

Jurgen Erchinger

Björn Emling

The present disclosure relates to a method of operating an automatic analysis apparatus for determining a parameter of a sample liquid which depends on the concentration of an analyte in the sample liquid on the basis of a first measurement variable detected by the analysis apparatus, wherein the analysis apparatus comprises an optical measuring transducer with a measurement unit, the method including: a) providing a reaction mixture comprising the sample liquid in the measurement unit; b) detecting a first measurement variable for determining the parameter; c) detecting a second measurement variable if step b) reveals that the concentration of the analyte in the reaction mixture is outside the measuring range of the analysis apparatus for detecting the first measurement variable; d) diluting the reaction mixture with dilution liquid as a function of the second measurement variable; and e) re-detecting the first measurement variable for determining the parameter.

Method of operating an automatic analysis apparatus and automatic analysis apparatus

A method for determining a parameter includes forming a reaction mixture by adding a volume of a solution to a sample. The solution contains a substance acting as a reaction partner for the analyte, where the reaction partner enters into a chemical reaction with the analyte, forming a reaction product of the analyte. The volume of the solution is adjusted, based on measured values of a physical or chemical measurand which are detected during the addition of the solution in the reaction mixture and whose value depends on the concentration of the analyte or of the substance in the reaction mixture. A titration of the solution to be titrated is subsequently performed from which a quantity of the substance present in the reaction mixture after addition of the volume of the solution is determinable, and a value of the parameter is ascertained using the titration.

Method for determining a parameter dependent on the concentration of at least one analyte in a sample liquid

A titration apparatus includes a titration measuring cell with a titration vessel, a valve device, and a first pump for sucking liquid through a first fluid line into a temporary storage container and transporting it via a second fluid line into the titration vessel. The temporary storage container is arranged in a fluid path between the first pump and the valve device. A third fluid line connects the first pump to the temporary storage container and is filled with a working liquid that does not affect the titration. A second pump conveys a volumetric solution into the titration vessel. An electronic controller controls the first and the second pumps and the valve device to convey a liquid from the first liquid supply into the temporary storage container to transport the liquid into the titration vessel and transport the volumetric solution into the titration vessel to carry out titration.

Titration apparatus and titration method

A TOC analyzer for determining a carbon content of a sample includes: a processing unit for removing carbon dioxide gas from the carrier gas before the oxidation of the sample, wherein the processing unit has a binder for binding the carbon dioxide gas from the carrier gas, wherein a defined water content is provided within the binder, wherein the processing unit is configured for moistening the binder by means of water vapor contained in the carrier gas; a condensation unit for condensing the water vapor resulting from the vaporization and/or oxidation of the sample to form a condensate, wherein the condensation unit has an outlet for the condensate toward a moistening unit; and the moistening unit for moistening the carrier gas by means of the condensate. A method for moistening a binder using such a TOC analyzer is further disclosed.

TOC analyzer and method for moistening a binder in a TOC analyzer

The present disclosure relates to a measuring cell for carrying out chemical analyses, having a vessel, in which at least one liquid to be analyzed is located; a heating wire, which is guided at least partially around an outer wall of the vessel, so that the liquid inside the vessel can be heated in a uniform and controlled manner; and a first temperature sensor, which determines and/or monitors a first temperature of the liquid. The measuring cell furthermore comprises a magnetic stirrer with a stir bar and a cover for closing the vessel, wherein the cover has a plurality of ducts, wherein at least one first duct is provided for at least one first analysis sensor, which determines and/or monitors at least one chemical and/or physical variable of the liquid of the vessel and wherein at least one second duct is provided for a liquid line.

Measuring cell for chemical analyses

The present disclosure relates to a capsule for preparing a solution for use with a measuring device for determining a measurand that depends on a concentration of at least one analyte in a sample. The capsule includes a wall completely enclosing an interior, at least one substance accommodated within the interior, and at least one stirring body. The present disclosure also relates to a system, which includes at least one capsule and a liquid container closed in a liquid-tight manner, which contains a predetermined volume of a liquid containing a solvent. In addition, the wall of the capsule is formed from a material which dissolves at least partially in the solvent.

Method and system for preparing a solution

A measuring apparatus for determining the total organic carbon of a sample in a liquid medium includes a reactor block made of a metallic, electrically conductive, and corrosion-resistant material, the reactor block including a housing wall for accommodating a light source, the housing wall including an inlet into and an outlet from the reactor block and a flow chamber in which digestion of the sample for determining the total organic carbon occurs, the flow chamber configured to accommodate the light source and to route the sample to be irradiated with light, wherein the measuring apparatus further includes at least one conductivity measurement device, wherein the reactor block is an external electrode of the conductivity measurement device. A method for determining the total organic carbon of the sample using the measuring apparatus is disclosed.

Measuring apparatus and method for determining the total organic carbon of a dissolved sample

The present disclosure relates to a method for diluting a sample liquid taken from a sampling point for the subsequent determination of a parameter which depends on a concentration of at least one analyte in the sample liquid, including: supplying a first quantity of the sample liquid to a mixing device via a first sample liquid line; supplying a second quantity of the sample liquid to a separator via a second sample liquid line; separating the analyte from the second quantity of the sample liquid supplied to the separator by means of the separator to obtain a dilution liquid that no longer contains the analyte, and mixing at least one portion of the first quantity of the sample liquid supplied to the mixing device via the first sample liquid line with at least one portion of the dilution liquid by means of the mixing device.

Method for diluting a sample liquid and dilution unit for a subsequent analysis

The present disclosure relates to a method for operating an automatic analysis apparatus for determining a parameter of a sample liquid, including: flushing a measurement unit of the analysis apparatus with a first volume of the sample liquid; discharging the first volume of the sample liquid into a collection container containing a waste liquid mixture; producing diluted sample liquid by mixing a second volume of the sample liquid with a dilution liquid using a dilution unit; producing a reaction mixture of at least a portion of the diluted sample liquid and at least one reagent; detecting a measured value of a measurement variable of the reaction mixture in the measurement unit; and, after detecting the measured value, discharging the reaction mixture from the measurement unit into the collection container, wherein the dilution liquid is recovered from the waste liquid mixture contained in the collection container.

Method for operating an automatic analysis apparatus

The present disclosure relates to a method for preparing an oil-in-water mixture having a predeterminable oil concentration which can be used as a reference mixture in the determination of oil concentrations of oil-in-water mixtures, comprising the steps of arranging at least one oil storage element in a container, feeding a predeterminable amount of a water-containing fluid into the container; and introducing ultrasonic waves into the fluid that are emitted in the direction of the oil storage element covered by the fluid, wherein the oil received in the oil storage element is released from the oil storage element by means of ultrasonic waves acting on the oil storage element and is distributed in the fluid. The present disclosure further relates to an apparatus for preparing an oil-in-water mixture.

Process for preparing an oil-in-water mixture and apparatus for preparing an oil-in-water mixture

An analytical device for automated determining of a measured variable of a liquid sample comprises: a liquid storage, which includes one or more liquid containers for one or more liquids; a measuring cell for accommodating the liquid sample, especially a liquid sample, to which has been added one or more liquids from the liquid storage, and a measuring arrangement for providing one or more measurement signals correlated with the measured variable; an electronics unit, which includes a control unit for control of the analytical device and for determining the measured variable based on the measurement signals provided by the measuring arrangement; and a handling unit including a supply- and dosing, or metering, system for supplying and metering the liquid sample and liquids from the liquid storage into the measuring cell, wherein the analytical device includes at least one exchangeable cassette, into which are integrated at least parts of the liquid storage and/or at least parts of the handling unit.

Analytical device for automated determining of a measured variable of a liquid sample

An apparatus for determining the content of at least one oxidizable constituent of an aqueous, liquid sample, comprising a high temperature reactor for decomposing the liquid sample and forming a gaseous mixture, which contains at least the constituent as a gaseous oxide, wherein the high temperature reactor has a liquid inlet for delivery of the liquid sample and a gas inlet for delivery of a carrier gas, and is connected via a gas discharge with an analysis chamber, wherein a condensing unit is placed in front of the analysis chamber for condensing water from the gas mixture, wherein, during operation of the apparatus, a gas stream of the carrier gas with the gas mixture of the high temperature reactor passes via the gas discharge and the condensing unit into the analysis chamber, and wherein, between the gas discharge and the condensing unit, a heatable filter unit is interposed for removal of salts and/or metal oxides from the gas mixture, and the gas discharge, the filter unit and optionally connecting elements arranged between gas discharge and filter unit are thermally insulated and/or equipped with heating elements in such a manner that their temperature during operation of the apparatus is settable to more than 100&#xb0; C.

Apparatus for determining content of at least one oxidizable constituent of an aqueous sample

An analytical device, including: a processing system for treating a liquid sample and for supplying the treated liquid sample to a measuring cell, to the liquid sample; a measuring transducer for registering a measured value of the treated liquid sample variable; a control unit to control the processing system; and an evaluating unit for determining the measured variable based on the measured value registered by the measuring transducer. The analytical device includes at least one first supply container containing a first reagent component, at least one second supply container containing a second reagent component and a mixing apparatus, for mixing a predetermined amount of the first reagent component contained in the first supply container with a predetermined amount of the second reagent component to form a predetermined amount of the reagent.

Analytical device for automated determination of a measured variable of a liquid sample

An analytical device for automated determining of a measured variable of a liquid sample, includes: a base module; a replaceable cassette connectable with the base module and having at least one liquid container connectable via a fluid line with a measuring cell and containing a reagent to be added to the liquid sample for forming a measured liquid; and a measuring transducer for registering measured values correlated with the measured variable for the measured liquid accommodated in the measuring cell. The cassette has, associated with the at least one liquid container, a fluid coupling apparatus having a primary component and a secondary component and serving for producing a connection of the fluid line with the liquid container.

Analytical device with base module and exchangeable cassette

A method for determining the number of drops metered with a drop frequency into a reactor, especially in a high temperature decomposition system for analyzers, wherein a gas stream is flowing through the reactor. There exists in the reactor a temperature, which is greater than the boiling temperature of the liquid, and a drop 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. With a sampling rate, which is greater than the drop frequency, a sequence of pressure signals dependent on pressure within the reactor is registered, and, from the sequence of pressure signals or from values derived therefrom, the number of drops metered into the reactor is ascertained.

Growing community of inventors

Ludwigsburg, Germany

Ulrich Kathe