# US 10,502,709 B2 · Electrophoresis device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,709 B2 - Document ID: US10502709B2 - Status: Granted - Kind: B2 - Application number: 15/418,195 - Filed: 2017-01-27 - Published: 2018-08-02 - Granted: 2019-12-10 - Earliest claimed: 2017-01-27 - Assignees: Shimadzu Corporation - Applicants: Shimadzu Corporation - Inventors: Akihiro Arai - Web page: https://patentgrep.com/patent/US10502709B2 ## CPC - G01N 27/44717: {Arrangements for investigating the separated zones, e.g. localising zones} - G01N 27/44743: {Introducing samples} - 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 The electrophoresis method includes the following steps: electrically injecting a sample into an electrophoresis flow path through one end thereof; subjecting the injected sample to electrophoresis to be separated by applying a voltage to both ends of the electrophoresis flow path; detecting the separated sample component at a detection position of the electrophoresis flow path; obtaining a peak area of the detected sample component; and correcting the obtained peak area on the basis of an injection rate of each sample component. Correction based on the injection rate includes, a correction based on a relative mobility of the sample component and at least one of: a correction based on the linear velocity at the time of sample injection for each sample component and a correction based on the current integral value at the time of sample injection. ## Claims ### Claim 1 An electrophoresis method for carrying out a quantitative analysis of sample components in which electrophoretic separation is carried out, the method comprising: (A) electrically injecting a sample containing a plurality of sample components different in size from each other into a gel-filled electrophoresis flow path through one end thereof; (B) subjecting the injected sample to electrophoresis to separate the sample components according to their size by applying a voltage to both ends of the electrophoresis flow path; (C) detecting the separated sample components at a detection position of the electrophoresis flow path; (D) obtaining a peak area of each of the detected sample components; and (E) correcting the obtained peak area for each of the sample components based on an injection rate of each sample component, wherein the correction based on the injection rate in step (E) includes (E1) a correction based on a relative mobility according to the size of each sample component, and: (E2) a correction based on a change in linear velocity at a time of sample injection for each sample component resulting from an intercalator disposed in the electrophoresis flow path. ### Claim 2 (depends on 1) The electrophoresis method according to claim 1, wherein in the step (A), two kinds of internal standard substances, internal standard substance A with smaller mobility than that of any sample component and internal standard substance B with larger mobility than that of any sample component, are injected into the electrophoresis flow path along with a sample, and in the correction (EI), an interpolation coefficient Fi for every sample component is used as the relative mobility; where the interpolation coefficient Fi is a standardized coefficient so that a mobility μA of the internal standard substance A is 0 and a mobility μB of the internal standard substance B is 1. ### Claim 3 (depends on 1) The electrophoresis method according to claim 1, wherein a linear velocity conversion table for every sample component obtained in advance under specific conditions is used as the correction (E2). ### Claim 4 (depends on 2) The electrophoresis method according to claim 2, wherein a linear velocity conversion table for every sample component obtained in advance under specific conditions is used as the correction (E2). ### Claim 5 An electrophoresis device, comprising: an electrophoretic section including: an electrophoresis flow path filled with gel, an electric power supply configured to apply a voltage for electrophoresis in the electrophoresis flow path and to both ends of the electrophoresis flow path and separate a plurality of sample components according to their size, and a detector for detecting the sample components separated in the electrophoresis flow path, and a controller that obtains an electrophoretic signal from the detector and carries out a quantitative analysis for every sample component; the controller including: a peak area calculation unit configured to determine a peak area of the sample components from the electrophoretic signal, and a correction unit configured to correct the determined peak area for each of the sample components based on an injection rate for every sample component; the correction unit including; a first peak area correction unit configured to correct the determined peak area based on a relative mobility of the sample component, according to a size of each sample component; and a controller that obtains an electrophoretic signal from the detector and carries out a quantitative analysis for every sample component; the controller including: a peak area calculation unit configured to determine a peak area of the sample components from the electrophoretic signal, and a correction unit configured to correct the determined peak area for each of the sample components based on an injection rate for every sample component; the correction unit including; a first peak area correction unit configured to correct the determined peak area based on a relative mobility of the sample component, according to a size of each sample component; and a second peak area correction unit configured to correct the determined peak area based on a change in linear velocity at a time of sample injection for every sample component resulting from an intercalator disposed in the electrophoresis flow path. ### Claim 6 (depends on 5) The electrophoresis device according to claim 5, wherein the electrophoresis device further comprises a linear velocity conversion table storing section for storing a linear velocity conversion table for every sample component; and wherein the second peak area correction unit is conjured to correct the determined peak area according to the linear velocity at the time of injection is configured to use the linear velocity conversion table stored in the linear velocity conversion table storing section. ### Claim 7 (depends on 5) The electrophoresis device according to claim 5, wherein the controller further comprises a current integral value calculation unit that incorporates an electric current value at the time of sample injection from the electric power supply and calculates the current integral value; and a third peak area correction unit that is configured to perform an injection rate-based correction based on the current integral value obtained by the current integral value calculation unit. ### Claim 8 (depends on 6) The electrophoresis device according to claim 6, wherein the controller further comprises a current integral value calculation unit that incorporates an electric current value at the time of sample injection from the electric power supply and calculates the current integral value; and a third peak area correction unit that is configured to perform an injection rate-based correction based on the current integral value obtained by the current integral value calculation unit.