# US 5,900,136 A · Method of measuring concentration of nonelectrolyte in electrolyte solution, method of preparing mixed solution containing electrolytes and nonelectrolytes and apparatus for preparing the solution

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,900,136 A
- Document ID: US5900136A
- Status: Granted
- Kind: A
- Application number: 09/019,406
- Filed: 1998-02-05
- Granted: 1999-05-04
- Earliest claimed: 1995-03-29
- Assignees: Toa Electronics Ltd.; Scitec, Inc.
- Inventors: Toshio Gotsu; Takeru Shibata; Yoshihiro Tsuzuso; Hiroyuki Suzuki; Toshiyuki Nakama
- Web page: https://patentgrep.com/patent/US5900136A

## CPC

- A61M 1/1656: {Apparatus for preparing dialysates}
- A61J 3/002: {Compounding apparatus specially for enteral or parenteral nutritive solutions (bottling liquids B67C)}
- A61M 1/1666: {by dissolving solids}
- A61M 1/1668: {Details of containers}
- G01N 27/06: of a liquid (involving electrolysis G01N27/26)
- Y10T 436/115831: Condition or time responsive
- Y10T 436/117497: with a continuously flowing sample or carrier stream
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Prior to measuring the concentration of a nonelectrolyte in an electrolyte solution, the electric conductivity of a mixed solution containing electrolytes and the nonelectrolyte is previously measured so as to determine the correlation between the electric conductivity and the concentration of the nonelectrolyte as to the same system. The concentration of the nonelectrolyte in the mixed solution can be determined from the electric conductivity obtained by measuring the mixed solution, based on the correlation.

## Claims

### Claim 1

A method of measuring a concentration of a nonelectrolyte in an electrolyte, comprising the steps of:
(a) adding stepwise and mixing a nonelectrolyte to and with an electrolyte solution which contains at least one electrolyte at a high concentration level sufficient such that an electric conductivity of the electrolyte solution is measurable, and measuring a reduction of the electric conductivity of the electrolyte solution into which the nonelectrolyte was added and with which the nonelectrolyte was mixed for each concentration of the nonelectrolyte, whereby a correlation between the electric conductivity of the electrolyte solution containing the nonelectrolyte and the concentration of the nonelectrolyte is determined for a system of the electrolyte and the nonelectrolyte;
(b) using the same system as step (a), adding and mixing the nonelectrolyte to and with a second solution of the electrolyte, and measuring the electric conductivity of the second solution of the electrolyte to which the nonelectrolyte was added and with which the nonelectrolyte was mixed; and
(c) determining a concentration of the nonelectrolyte contained in the second solution of the electrolyte based on the correlation between the electric conductivity of the electrolyte solution and the concentration of the nonelectrolyte determined in step (a).

### Claim 2 (depends on 1)

A method according to claim 1, wherein the electrolyte is an electrolyte medicine mainly composed of sodium chloride and the nonelectrolyte is a glucose medicine.