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Automatic analyzer

A technology of automatic analysis device and degassing device, which is applied in the direction of analysis materials, instruments, biological tests, etc., can solve the problems of decreasing the concentration of surfactants, reducing the effect of inhibiting the reproduction of bacteria, and eliminating the occurrence and stability of microbubbles. The effect of metering

Inactive Publication Date: 2009-09-02
HITACHI HIGH-TECH CORP
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  • Abstract
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Problems solved by technology

In general, surfactants are often added to the liquid circulating in the reaction tank in order to suppress the growth of miscellaneous bacteria. However, when the gas accumulated in the upper part of the bubble removal tank is discharged, part of the liquid in the reaction tank is also discharged at the same time. , therefore, the concentration of surfactant in the liquid decreases, which may also reduce the effect of inhibiting the growth of miscellaneous bacteria

Method used

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Embodiment Construction

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] figure 1 It is a block diagram showing an embodiment of a hot water circulation type reaction tank using the automatic analyzer of the present invention. The reaction vessel 2 mounted on the circumference of the circular reaction disk 1 is immersed in the liquid held in the same circular reaction tank 3 . The liquid in the reaction tank is always circulated by the circulation pump 6 provided between the discharge pipe 4 and the supply pipe 5, and the temperature is controlled by on / off control of the heating moxa. Thereby, the reaction liquid held inside the reaction vessel 2 is kept at an optimum temperature (for example, 37° C.) required for the reaction. The liquid in the reaction tank can be water or other solutions. In addition, when the temperature of the liquid in the reaction tank is too high, a cooling unit 8 for cooling the liquid may be provided. I...

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Abstract

Disclosed herein is an automatic analyzer that can eliminate the generation of air bubbles of dissolved gas in a liquid circulating in a thermostat bath enabling stable photometry. A degasifier for removing the dissolved gas in the liquid and a bypass passage for ensuring a flow rate required for temperature control of the circulating liquid are provided in a passage for temperature-controlled liquid circulating in the thermostat bath. The automatic analyzer can reduce the dissolved gas concentration to a level at which air bubbles of the dissolved gas in the liquid do not appear while maintaining a flow rate required for temperature control of the liquid circulating in the thermostat bath, thus eliminating air bubbles passing through the light flux during photometry and accordingly enabling stable photometry.

Description

technical field [0001] The present invention relates to an automatic analysis device for component analysis of biological samples such as blood and urine, and more particularly to an automatic analysis device having a liquid reaction tank for keeping the temperature of a reaction container constant. Background technique [0002] Stable photometric performance is required for an automatic analyzer that performs qualitative and quantitative analysis of a target component by mixing a sample and a reagent in a reaction vessel and then measuring the optical properties of a reaction liquid. In particular, in an analysis device that can reduce the consumption of samples and reagents, and can analyze with a small amount of reaction liquid, it is necessary to reduce the size of the reaction container. , Compared with the past, even micro-sized air bubbles may affect the metering. [0003] Patent Document 1 - Japanese Unexamined Patent Application Publication No. 2005-181087 disclose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N35/00G01N33/48G01N21/31
CPCG01N2035/00396G01N35/00G01N2035/00465G01N2035/00346
Inventor 饭岛昌彦草野和美东信二
Owner HITACHI HIGH-TECH CORP
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