Sample injection device
AssigneeHitachi High-Technologies Corporation
InventorsShinya ITO, Shigeo MUTO
Life of this patent
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Abstract
Provided herein is a sample injection method that enables efficient injection of a trace sample solution while reducing the measurement time. A sample solution is injected into a sample loop with air layers disposed on both sides of the sample solution, and the total amount of the sample solution, including the air layers, is injected into a detector. The start and the end of data collection are determined from the detection signal intensity changes that occur upon the air layers being injected into the detector, and the velocity of the flowing liquid is increased to reduce the measurement time. A washing solution is injected after the air layer to improve the washing efficiency and reduce the washing time.
Claims14
A sample injection device for injecting a sample into a detector, and comprising:
- a sample loop that retains a liquid;
- a container that contains the flowing solvent;
- a drawing section that draws the sample;
- a liquid passing section that passes a liquid;
- and
- a flow path switching section that switches between a first flow path joining the flowing solvent and the sample loop, and a second flow path joining the drawing section and the sample loop,
- wherein the liquid passing section under the control of the sample injection device injects the sample from the sample loop into the detector with air layers disposed on both sides of the sample.
An automatic analyzer that includes a detector, and a sample injection device for injecting a sample into the detector,
- the automatic analyzer comprising:
- a sample loop that retains a liquid;
- a container that contains the flowing solvent;
- a drawing section that draws the sample;
- a liquid passing section that passes a liquid;
- and
- a flow path switching section that switches between a first flow path joining the flowing solvent and the sample loop, and a second flow path joining the drawing section and the sample loop,
- wherein the liquid passing section under the control of the automatic analyzer injects the sample from the sample loop into the detector with air layers disposed on both sides of the sample.
A sample injection method for injecting a sample into a detector,
- the method comprising injecting the sample into the detector with air layers disposed on both sides of the sample.
Dependencies are inferred from the claim text.