JPS6044851A - Spectrophotometer - Google Patents

Abstract

PURPOSE:To omit the injection of a sample into a cell and to remove contamination simply, by arranging the end part of a light conductor, which is connected to a light source so that they face to each other, and making it possible to immerse a spectrophotometer in a sample fluid. CONSTITUTION:Tubular bodies 4 and 5, whose one end is opened, respectively, are made to face each other, and a measuring part 6 is formed with a specified distance being provided. They are fixed to a base body 17. Transparent plates 7 and 8 are attached to said opening parts by O rings 9 and 10 in an airtight manner so that the plates can be removed. Thus windows 11 and 12 are formed. A light receiving element 13 is provided at one window 13, and a condenser lens 14 is provided at the other window 12. A light projecting port 15 of an optical fiber 3 is attached by a screw 16. A light shielding cover 19, which can be slidden up and down, is attached to the outer surface of a light measuring body 1. The measuring part is shielded as required so that external light does not enter the measuring part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Application of the Technology The present invention relates to a spectrophotometer, and more particularly to a photometry section thereof.

B. Conventional technology Spectrophotometer chambers employ a method in which a sample solution is dispensed into a cell placed in a sample chamber in which a light-emitting part and a light-receiving part are arranged facing each other.
Flow cell systems are used, in which a light emitting part and a light receiving part are placed opposite each other in the flow path of the sample liquid, but in these methods, it is difficult to inject the sample into the cell or remove dirt that has adhered to the inner surface of the cell. There was a problem in that it took time and effort to remove.

(Objective) In view of these problems, it is an object of the present invention to provide a spectrophotometer that makes it unnecessary to inject a sample into a cell and allows easy removal of contamination.

2. Structure of the invention, that is, 1. The features of the present invention are 1. The end of the light guide connected to the light emitting section and the light receiving section are arranged airtightly opposite to the main body of the photometry section so that they can be immersed in the sample fluid. It is in.

E. Embodiments The details of the present invention will now be explained based on illustrated embodiments.

FIG. 1 is an external view of an apparatus showing an embodiment of the present invention, and the reference numeral l in the figure is a photometer which is a characteristic part of the present invention, one end of which is disposed opposite to the light emitting part of the analyzer 2. optical fiber 3
It is constructed by connecting the other end of the FIG. 2 shows an embodiment of the above-mentioned photometric body, in which cylindrical bodies 4 and 5 each having an open end are placed opposite each other to form a measuring part 6 at a certain distance apart from each other and attached to a base 17. A transparent plate 7.8 made of quartz glass or the like is removably and airtightly attached to each opening using an O-ring 9.10 to form a window 11.12. A condenser lens 14 is interposed in the window 12, and the light projection p15 of the optical fiber 3 is attached to the window 12 so as to be adjustable back and forth with a screw member 16. A signal from this light receiving element 13 is input to the analyzer 2 via a signal cord 18 passing through the base 17.

A light-shielding cover 19 that can be slid up and down is attached to the outer periphery of the photometer 1 to shield the measuring section from light as necessary so that external light does not pass through the measuring section 6.
It is constructed to prevent it from entering. In addition,
Reference numeral 20 in the figure indicates an optical fiber fixing cap attached to the upper part of the cylindrical body 4.

In this embodiment, after the photometer l is immersed in the sample fluid with the light shielding cover 19 pulled upward to expose the measurement part 6, the light shielding cover 19 is lowered and the light emitting part of the analyzer 2 is activated. When the measurement light is irradiated onto the sample fluid in the measurement unit 6 through the optical fiber 3, the light with a wavelength corresponding to the component of the sample fluid is absorbed in proportion to its concentration and is transmitted to the light receiving element 13.
reach. This light is converted into an electrical signal by the light receiving element 13, inputted into the analyzer 2, converted into the concentration in the sample fluid, and displayed. When dirt adheres to the windows 11 and 12 due to long-term use, a cloth or the like is inserted through the photometry section 6 to wipe away the dirt if the dirt is light.

In addition, for severe contamination, from the photometer l to the transparent plate 7.8
By removing it, cleaning it with a detergent, etc., and then setting it back, accurate measurements can be made with the original transmittance.

In this embodiment, the distance between the windows on the irradiation side and the light receiving side is fixed, but the distance between the windows can be adjusted with a thread or the like so as to correspond to the sample concentration.

B. Effects As explained above, according to the present invention, the light emitting part and the light receiving part of the measuring object are disposed opposite each other so that it can be opened to the external fluid. Not only can analysis be performed and the labor of injecting a sample into a cell can be saved, but also concentration uniform distribution values can be easily measured by moving the sample in the fluid. Furthermore, since the light from the light source is guided to the light projecting section through an optical fiber, analysis in a wide range of wavelengths is possible despite the small size of the photometer.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an apparatus showing one embodiment of the present invention, and FIG.
Figures (A) and (B) are an external view and a cross-sectional view of an embodiment of the photometer in the same device as above, respectively.・Optical fiber 4.5...Cylindrical body 6...Measurement part 1
1.12... Window 13... Light receiving element 14...
・Lens 15...Projection port

Claims (1)

[Claims] Two wooden cylindrical bodies each having a light-transmitting and airtight window formed at one end are arranged in a straight line with a gap between them with the windows facing each other,
A spectrophotometer comprising a light receiving element in one window and a light projection opening of a light guiding means connected to a light emitting means in the other window.