JPH0645634U - Temperature chamber for analyzer - Google Patents

Abstract

(57) [Summary] [Objective] To provide a thermostat for an analyzer, which has excellent thermal efficiency, good temperature distribution, and is easy to handle. A column 14 forming a reaction tube is embedded in a metal support 12 with a low melting point metal 13, and a heater 15 is attached to the support 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thermostat for an analyzer, and more specifically, as in reaction liquid chromatography, a specific reaction reagent is added to a sample and allowed to react at a predetermined temperature. The present invention relates to a constant temperature bath used for an analyzer for analyzing a target substance.

[0002]

[Prior art]

 For example, a device called a carboxylic acid analyzer analyzes a carboxylic acid in a sample by utilizing a specific color reaction for a carboxyl group of the carboxylic acid. As shown in FIG. The reaction reagent A is added to the sample separated by the separation column in the jacket 1 and introduced into the reaction tube 2. Since this reaction tube 2 is kept at the optimum temperature for this reaction, a color reaction occurs only with the target component here. After that, the color generated by this reaction is measured by the detector 3.

As a means for maintaining the reaction tube 2 in a predetermined heating state, as shown in FIG. 5, a Teflon tube for forming the reaction tube 2 in an aluminum heating block 5 having a heater 4 built therein. A column (capillary tube) 2a consisting of the above is wound, or a column in which the column is housed in something like the heating jacket 1 and heated with warm water or oil according to the heating temperature has been widely used.

[0004]

[Problems to be solved by the device]

 However, in the case where the column is wound around the heating block, the heat transfer efficiency is poor because the heating block surface and the column are in line contact, and the temperature distribution is poor because the parts other than the contact part are exposed to the air. . Further, when a heating jacket is used, water or oil is used as a heating source, which is troublesome to handle.

Therefore, an object of the present invention is to provide a thermostat for an analyzer, which has excellent thermal efficiency, good temperature distribution, and is easy to handle.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the constant temperature bath for an analyzer of the present invention is such that a column forming a reaction tube is embedded in a metal support body with a low melting point metal, and a heating element is attached to the support body. Is characterized by.

[0007]

[Work]

 According to the above configuration, the heat from the heating element is transmitted to the entire surface of the column forming the reaction tube through the metal support and the low melting point metal, so that the reaction tube can be efficiently heated and easily. It can be controlled to a predetermined temperature. In addition, by using a low melting point metal for embedding, it is possible to embed even if the shape of the reaction tube is complicated, and to damage the Teflon tube that is often used as the reaction tube of these analyzers. There is no.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view and FIG. 2 is an explanatory view of a manufacturing process. This column constant temperature bath 11 is a support 12 made of a metal having a high thermal conductivity such as aluminum, and a column (capillary tube) 14 made of a Teflon tube forming a reaction tube with a low melting point metal 13 embedded therein. The heater 15 is provided on one side, and the outer periphery of the heater 15 is covered with a heat insulating material 16.

To embed the column 14 in the support 12 with the low melting point metal 13, as shown in FIG. 2, the column 14 is put in the groove 12 a formed on the upper surface of the support 12 and both ends of the groove 12 a are inserted. It suffices to block and pour the low melting point metal 13, and the column thermostat 11 having the above configuration can be easily manufactured.

As described above, the column 14 serving as a flow channel for reaction is embedded in the metal support 12 by the low melting point metal 13 and heated by the heater 15 attached to the support 12 to obtain the thermal conductivity. The entire column 14 can be heated over the entire surface through the high-metal support 12 and the low-melting-point metal 13 and can be heated to a predetermined temperature in a short time, and accurate temperature control is possible. Moreover, since it does not use a heat medium such as water or oil, it is easy to handle and requires almost no maintenance.

FIGS. 3 and 4 show a second embodiment of the present invention, in which a column 21 is wound in a coil shape and embedded in a cylindrical support 22. Further, as shown in FIG. 3, by embedding the detecting portion 23a of the temperature sensor 23 in the low melting point metal 24 at the same time as the column 21, it is possible to measure the accurate temperature. In the figure, 25 is a power supply line for the heater 26, and 27 is a heat insulating material.

By using the coil-shaped column 21 as described above, a reaction tube portion having a desired length can be provided in a small space in the support 22 and moreover, the whole can be uniformly heated. Therefore, the accuracy of analysis can be improved.

As the low melting point metal, it is possible to use those having various compositions as long as they are in a molten state at a temperature at which the material forming the column is not damaged.

[0014]

[Effect of device]

 As described above, in the thermostat for analyzers of the present invention, the column serving as the reaction tube is embedded in the metal support through the low melting point metal, and the support is heated by the heater (heating element). Therefore, the heat of the heater can be transferred to the entire reaction tube through the support and the low melting point metal, and the heat transfer efficiency can be improved and the heat loss can be reduced, so that the heat can be heated to a predetermined temperature in a short time. It enables accurate temperature control.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view of a column thermostatic chamber showing a first embodiment of the present invention.

FIG. 2 is likewise an explanatory view of the manufacturing process.

FIG. 3 is a sectional view showing a second embodiment of the constant temperature oven of the present invention.

FIG. 4 is likewise an explanatory view of the manufacturing process.

FIG. 5 is a schematic system diagram showing an example of an analyzer using a constant temperature bath.

[Explanation of symbols]

11 ... Column constant temperature bath, 12, 22 ... Support, 13, 24
... low melting point metal, 14, 21 ... column, 15, 25 ... heater, 16, 27 ... heat insulating material, 23 ... temperature sensor

Claims (1)

[Scope of utility model registration request] 1. A constant temperature bath used in an analyzer for analyzing a component to be analyzed by introducing a trace amount of the component to be analyzed and a reagent into a reaction column held at a predetermined temperature to cause reaction.
A thermostat for an analyzer, wherein the reaction column is embedded in a metal support body with a low melting point metal, and a heating element is attached to the support body.