# US 5,710,371 A · Container for calibrating fluids, and device and method for measuring parameters of a sample of fluid, and oxygen electrode therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,710,371 A - Document ID: US5710371A - Status: Granted - Kind: A - Application number: 08/589,617 - Filed: 1996-01-22 - Granted: 1998-01-20 - Earliest claimed: 1995-01-25 - Assignees: Przedsiebiorstwo Zagraniezne HTL - Inventors: Andrzej Czernecki; Andrzej Bylina; Jan Kawiak; Piotr Ohnsorge - Web page: https://patentgrep.com/patent/US5710371A ## CPC - G01N 33/4925: {measuring blood gas content, e.g. O2, CO2 , HCO3} - G01N 27/4163: {checking the operation of, or calibrating, the measuring apparatus (G01N27/3274, G01N27/4175 and G01N33/0006 take precedence)} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract A device for measuring the parameters of a sample of fluid comprising exchangeable containers for calibrating fluids and an oxygen electrode. The device comprising a measuring chamber having at least two measuring channels with measuring electrodes for determining the acid-base equilibrium parallel introduced into the measuring channel of the device and connected with a common electronic system. The exchangeable containers for calibrating fluids each comprising an elastic, impermeable container for gases with an elastic joint for ensuring tightness of the connection between the container and a device. The oxygen electrode comprising an oxygen electrode of a Clark's electrode system with an anode made of an element selected from the VIB group of the periodic system of chemical elements. ## Claims ### Claim 1 A closed container for holding calibrating fluids with a specified pH or partial pressure of gas as a reference in liquid analysis device for measuring parameters of a sample of fluid, comprising: an elastic, impermeable thick-wall or barrier type of bag enclosure for containing gases within an aqueous solution, said container having a fluid flow outlet connecting element; wherein said connecting element is a self-tightening elastic joint comprising rubber materials, said self-tightening elastic joints ensuring tightness of a connection between the container and the device, said joint remaining closed during filling, storing, installing and using of the container in the device, whereby the calibrating fluids maintain a constant concentration of saturating gases within said solution during storage, installation and use of the container. ### Claim 2 An oxygen electrode in a liquid analysis device for measuring parameters of a sample of fluid, comprising: a Clark's electrode system; wherein an anode of the electrode system is made of an element selected from the VIB group of the periodic table system of chemical elements, where said measured parameters include pH or partial pressure of gas components in said fluid. ### Claim 3 (depends on 2) The oxygen electrode according to claim 2, wherein said anode is made of tungsten. ### Claim 4 (depends on 2) The oxygen electrode according to claim 2, wherein said anode is made of molybdenum. ### Claim 5 A liquid analysis device for measuring parameters of a sample of fluid, comprising: an analyzer and a control unit with a monitor, the analyzer comprising a measuring chamber with measuring electrodes, the measuring chamber being connected with closed, replaceable containers for holding calibrating fluids with a specified pH or partial pressure of gas as a reference and for holding working fluids and into which measuring chamber are introduced a sample of a measured fluid, control elements and operating elements to control the operation of the device and to maintain a constant temperature of the device, as well as computer processing elements for transforming results of measurements into quantities of parameters of the sample of fluid; wherein the device comprises elastic, impermeable, and exchangeable containers for the calibrating fluids, said containers having a connecting element wherein said connecting element is a self-tightening elastic joint comprising rubber materials, said self-tightening elastic joint ensuring tightness of a connection between the container and the device, said joint remaining closed during filling, storing, installing and using of the container in the device, whereby the calibrating fluids maintain a constant concentration of saturating gases during storage, installation and use of the container. ### Claim 6 A liquid analysis device for measuring parameters of a sample of fluid, comprising: an analyzer and a control unit with a monitor, the analyzer comprising a measuring chamber with measuring electrodes, the measuring chamber being connected with closed, replaceable containers for holding calibrating fluids with a specified pH or partial pressure of gas as a reference and for holding working fluids and into which measuring chamber are introduced a sample of a measured fluid, control elements and operating elements to control the operation of the device and to maintain a constant temperature of the device, as well as computer processing elements for transforming results of measurements into quantities of parameters of the sample of fluid; wherein the device comprises elastic, impermeable, and exchangeable containers for the calibrating fluids, said containers having a connecting element wherein said connecting element is a self-tightening elastic joint ensuring tightness of a connection between the container and the device, said joint remaining closed during filling, storing, installing and using of the container in the device, whereby the calibrating fluids maintain a constant concentration of saturating gases during storage, installation and use of the container; and further comprising oxygen electrodes each comprising a Clark's electrode system, wherein an anode of the electrode system is made of an element selected from the VIB group of the periodic table system of chemical elements. ### Claim 7 (depends on 6) The device according to claim 6, wherein said anode is made of tungsten. ### Claim 8 (depends on 6) The device according to claim 6, wherein said anode is made of molybdenum. ### Claim 9 (depends on 5) The device according to claim 5, wherein said measuring chamber comprises at least two measuring channels with measuring electrodes for measuring an acid-base equilibrium state in said fluid sample, said measuring electrodes included in each of the measuring channels of the equipment and connected with common electronic systems. ### Claim 10 A liquid analysis method for measuring parameters of a sample of fluid, comprising the steps of: passing samples of a measured fluid, a calibrating fluid and a working fluid through a measuring chamber having at least two distinct and independent measuring channels at specified intervals of time as performed alternately and sequentially according to pre-planned steps in a proportional time-allocated measuring cycle; measuring physical-chemical properties of the measured fluid and of the calibrating fluids with sets of measuring electrodes; determining quantities of parameters of a sample of fluid on the basis of the measured properties; introducing standard aqueous solutions saturated with gases as well as oxygen taken from air as calibrating fluids for exposure to the measuring electrodes in the measuring chamber; dividing the calibrating fluid standard solutions alternatively with the measured sample of fluid and with the working fluids and in accordance with the measuring cycle among said at least two distinct and independent measuring channels disposed in the measuring chamber, each channel comprising a set of measuring electrodes for determining an acid-base equilibrium state in said fluid sample; and recalculating measurement results for each measuring channel in a common electronic system.