Analysis Apparatus Having a Plurality of Chromatographs and Controlling Method Thereof

Patent metadata

Field	Value
Publication number	US-2022011280-A1
Application number	US-201917295317-A
Country	US
Kind code	A1
Filing date	Nov 20, 2019
Priority date	Nov 20, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

An analysis apparatus having a plurality of chromatographs is provided capable of achieving suppression of a reduction in throughput even when a separation column needs to be replaced at the end of its lifespan. When estimating that a column used in a liquid chromatograph 107 reaches the end of its lifespan, a control unit calculates back time from the estimated time so that another liquid chromatograph 117 is ready for measurement at a timing when the liquid chromatograph 107 becomes unusable for the measurement. Then, the control unit starts the preparation operation of the liquid chromatograph 117. After the completion of the preparation operation, the liquid chromatograph 117 performs initialization, equilibration, standard sample injection, elution, and washing processes of a preliminary new column. The control unit evaluates the normality of the new column in the liquid chromatograph 117 immediately after the column of the liquid chromatograph 107 reaches the end of its lifespan, and then causes the liquid chromatographs 102, 112, and 117 to perform continuous analysis.

First claim

1 . An analysis apparatus having a plurality of chromatograph separation units, comprising: the plurality of chromatograph separation units, each of the chromatograph separation units including a liquid feeding portion for feeding a mobile phase to an analysis flow path, a sample injection portion for injecting a sample into the analysis flow path, a separation column containing a filler that interacts with a sample component, and a column thermostat for stabilizing the separation column; a detector to which the plurality of chromatograph separation units are connected in parallel; a flow path switching portion for selectively introducing a measurement target component eluted from the plurality of chromatograph separation units to the detector; and a control unit for controlling the plurality of chromatograph separation units, the detector, and the flow path switching portion,
wherein the plurality of chromatograph separation units include at least one chromatograph separation unit in a standby state.

2 . The analysis apparatus having the plurality of chromatograph separation units according to claim 1 ,
wherein the chromatograph separation unit in the standby state includes a separation column that is normally usable.

3 . The analysis apparatus having the plurality of chromatograph separation units according to claim 2 ,
wherein the chromatograph separation unit in the standby state is on standby in a state of stopping temperature control of the liquid feeding portion and the column thermostat.

4 . The analysis apparatus having the plurality of chromatograph separation units according to claim 3 ,
wherein the control unit estimates that a separation column included in a chromatograph separation unit other than the chromatograph separation unit in the standby state among the plurality of the chromatograph separation units reaches an end of a lifespan thereof, and then adjusts timings of a preparation operation, initialization, equilibration, standard sample elution, and washing of the chromatograph separation unit in the standby state in accordance with a timing when the separation column reaches the end of the lifespan thereof.

5 . The analysis apparatus having the plurality of chromatograph separation units according to claim 1 ,
wherein the plurality of chromatograph separation units are liquid chromatographs, and the detector is a mass spectrometer.

6 . A method of controlling an analysis apparatus having a plurality of chromatograph separation units, the analysis apparatus comprising: the plurality of chromatograph separation units, each of the chromatograph separation units including a liquid feeding portion for feeding a mobile phase to an analysis flow path, a sample injection portion for injecting a sample into the analysis flow path, a separation column containing a filler that interacts with a sample component, and a column thermostat for stabilizing the separation column; a detector to which the plurality of chromatograph separation units are connected in parallel; a flow path switching portion for selectively introducing a measurement target component eluted from the plurality of chromatograph separation units to the detector; and a control unit for controlling the plurality of chromatograph separation units, the detector, and the flow path switching portion, the method comprising the steps of:
bringing at least one of the plurality of chromatograph separation units into a standby state while having a separation column thereof normally usable, in a state of stopping temperature control of the liquid feeding portion and the column thermostat; estimating that a separation column included in a chromatograph separation unit other than the chromatograph separation unit in the standby state among the plurality of the chromatograph separation units reaches an end of a lifespan thereof; and bringing the chromatograph separation unit in the standby state, into a usable state in accordance with a timing when the estimated separation column reaches the end of the lifespan.

7 . The method of controlling an analysis apparatus having a plurality of chromatograph separation units according to claim 6 , the method further comprising a step of:
adjusting timings of a preparation operation, initialization, equilibration, standard sample elution, and washing of the chromatograph separation unit in the standby state in accordance with the timing when the separation column reaches the end of the lifespan.

8 . The method of controlling an analysis apparatus having a plurality of chromatograph separation units according to claim 6 ,
wherein the plurality of chromatograph separation units are liquid chromatographs, and the detector is a mass spectrometer.

Assignees

• Hitachi High Tech Corp

Inventors

• Ogata Izumi
• SUGIME Takayuki
• Nogami Makoto
• Akieda Daisuke

Classifications

• G01N30/7233 Primary

  interfaced to liquid or supercritical fluid chromatograph (interfaces in general for introducing or extracting samples to be analysed with specially adapted mass spectrometer, see H01J49/04) · CPC title

• G01N30/86 Primary

  Signal analysis · CPC title

• G01N30/46

  using more than one column {(G01N30/44 takes precedence)} · CPC title

• G01N30/466

  with separation columns in parallel · CPC title

• G01N2030/027

  Liquid chromatography · CPC title