CN100494980C

CN100494980C - Automatic analysis recorder of liquid UV light

Info

Publication number: CN100494980C
Application number: CNB2005100118108A
Authority: CN
Inventors: 郭兴林; 徐坚; 李晓锋
Original assignee: Institute of Chemistry CAS
Current assignee: Institute of Chemistry CAS
Priority date: 2005-05-27
Filing date: 2005-05-27
Publication date: 2009-06-03
Anticipated expiration: 2025-05-27
Also published as: CN1869655A

Abstract

The invention relates to a liquid UV on-line detecting automatic analysis recorder, arranging UV light source, calibration tank and hollow cylinder in order on vertical light path from the top down, where at the bottom of the cylinder is a quartz isosceles right-angle triple prism, and a quartz plate is close the bottom, and the cylinder wall between the quartz plate and the triple prism are made with several small holes which make measured liquid able to freely pass through; the inclined side of the triple prism is parallel to the quartz plate and two right-angle sides of the triple prism are coated with total reflection film; the lower part of the calibration tank is provided with the other same triple prism and the upper part of the calibration tank is a hollow quartz tank; on the horizontal light path, reflector, light splitter and detector are in turn arranged from left to right. And the invention can eliminate drift and stray light and has highly accurate detection result.

Description

A kind of automatic analysis recorder of liquid UV light

Technical field

The invention belongs to fields of measurement, specifically relate to the automatic analysis recorder of the online detection usefulness of a kind of liquid UV light.

Background technology

In commercial production, often need to note down and monitor in real time the content of certain material in the liquid by ultraviolet (comprising visible light) or infrared method.Existing Ultraviolet Detector---ultraviolet spectrophotometer as shown in Figure 1, it comprises a ultraviolet source 1, optical splitter 6, sample cell 8 and detecting device 7.During use, the light that ultraviolet source 1 produces is earlier through beam split part 6, and the light timesharing of different wave length enters detecting device 7 at last by the testing sample in the sample cell 8 then.

This Ultraviolet Detector all needs hand sampling, is difficult for realizing online detection, and when the needs on-line measurement, because light source is wanted long-play, energy jitter is bigger.What is more important, this method adopts first beam split, and the back is by sample cell, and online detection generally is difficult to the complete closed sample cell, the extraneous parasitic light of different wave length will enter detecting device inevitably simultaneously, thereby influences the accuracy of testing result.

Summary of the invention

Big, the testing result defects of low accuracy of energy jitter when the objective of the invention is to overcome the online detection of existing Ultraviolet Detector can be eliminated drift, eliminating parasitic light, automatic analysis recorder of liquid UV light that the testing result accuracy is high thereby provide a kind of.

The objective of the invention is to realize by the following technical solutions:

The invention provides the on-line automatic analysis recorder of a kind of liquid UV light, its synoptic diagram comprises as shown in Figure 2: 1, one optical splitter of a ultraviolet source 6, a detecting device 7 and a sample cell 8;

On the light path of vertical direction, be arranged in order ultraviolet source 1 from top to bottom, calibration pool 11, the cylinder 4 of one hollow, cylinder 4 bottoms of this hollow are the isosceles right angle prism of a quartz, one piezoid 9 is set in the cylinder 4 of the hollow above the isosceles right angle prism, on the barrel between piezoid 9 and this isosceles right angle prism, several apertures is arranged, make that measured liquid can the free flow mistake; The hypotenuse of described isosceles right angle prism is parallel with piezoid 9, and 2 right-angle side outsides are coated with the film that is all-trans; The bottom of described calibration pool 11 is the isosceles right angle prism of a quartz identical with described isosceles right angle prism, and top is the quartz cell of a hollow;

On the light path in the horizontal direction, be arranged in order the catoptron 12 that is miter angle with horizontal line from left to right, optical splitter 6 and detecting device 7.

During use, the hollow cylinder 4 of the on-line automatic analysis recorder of aforesaid liquid ultraviolet light vertically is immersed in the testing sample, did not have piezoid 9 with the liquid level of testing sample, and do not have the top of hollow cylinder 4 to be advisable near the bottom.On the light path of vertical direction, the light that is produced by ultraviolet source 1 is behind collimation, cylinder 4 (its top can keep apart light in the light path and the liquid in the sample cell) through hollow enters liquid to be measured, pass through the reflection of the film that is all-trans on 2 right-angle sides of prism more successively, impinge perpendicularly on the catoptron 12, enter optical splitter 6 with horizontal direction after reflection, after beam split, detect the light intensity of the wavelength that will measure by detecting device 7.

In the testing process, used standard model calibration measurement result greater than 5 seconds interval time, and the alignment time can be set arbitrarily at interval according to actual needs.In measuring process, calibration pool 11 is not blocked light path, have only when needs are calibrated and make calibration pool blocking-up light path by plant equipment, at this moment on the light path of vertical direction, the light that is produced by ultraviolet source 1 passes through calibration pool 11, the reflection of catoptron 12 is passed through in the reflection of the film that is all-trans on 2 right-angle sides of the prism of calibration pool 11 bottoms again, enters detecting device 7 with horizontal direction by optical splitter 6.Drift calibration measurement result by standard model.After the calibration, calibration pool 11 is removed, proceeded to measure by plant equipment.

Compared with prior art, the advantage of liquid UV light online test method provided by the invention and automatic analysis recorder thereof is:

The first, the hollow pipe that forms of the cylinder by hollow 4 and the piezoid simple optic such as (being equivalent to quartz window) of bottom thereof have realized real-time, the online detection in open sample cell, side by side except the influence of the parasitic light of extraneous different wave length;

The second, the method by the back beam split reduces the influence of parasitic light to measurement result, makes the accuracy of measurement result increase greatly;

Three, eliminate the drift of light source by timing handover measurement reference sample.

Four, enter the not loss of the preceding light intensity of optical splitter in the testing process.

Description of drawings

Fig. 1 is the synoptic diagram of the ultraviolet spectrophotometer of prior art;

Fig. 2 is the synoptic diagram of the on-line automatic analysis recorder of a kind of liquid UV light provided by the invention;

Wherein, 1 ultraviolet source, 11 calibration pools, 4 cylinders, 6 optical splitters, 7 detecting devices, 8 sample cells, 9 piezoids, 12 catoptrons.

Embodiment

The on-line automatic analysis recorder of liquid UV light provided by the invention, its synoptic diagram comprises as shown in Figure 2: on the light path of vertical direction, be arranged in order ultraviolet source 1 from top to bottom, the stainless steel cylinder 4 of calibration pool 11, one hollows and sample cell 8; The diameter of cylinder 4 is 30mm, length is 50cm, is the isosceles right angle prism of a quartz in the bottom of tube, is a piezoid 9 near 1cm place, bottom, on the barrel between piezoid 9 and this isosceles right angle prism, several apertures are arranged, make that measured liquid can the free flow mistake; Or stainless steel cylinder 4 is with piezoid 9 sealed bottoms, structure with rigidity between the isosceles right angle prism of other one quartz that separates and the cylinder 4 connects, as use stainless steel strip the isosceles right angle prism of quartz to be fixed to the lower end of cylinder 4,2 at a distance of 1cm, makes that measured liquid can the free flow mistake; Described calibration pool 11 plates the quartz cell of the hollow of the film that is all-trans for the bottom surface; On the light path in the horizontal direction, be arranged in order optical splitter 6 and detecting device 7 from left to right from part reflective semitransparent film 2.The hypotenuse of described isosceles right angle prism is parallel with piezoid 9, and 2 right-angle sides outside is coated with the silver film that is all-trans; The bottom of described calibration pool 11 is the isosceles right angle prism of a quartz identical with above-mentioned isosceles right angle prism, and top is the quartz cell of a hollow; On the light path in the horizontal direction, be arranged in order the catoptron 12 that is miter angle with horizontal line from left to right, optical splitter 6 and detecting device 7.

Testing sample places open sample cell 8, during use, the hollow cylinder 4 of the on-line automatic analysis recorder of aforesaid liquid ultraviolet light vertically is immersed in the testing sample, did not have the piezoid 9 of close bottom with the liquid level of testing sample, and do not have the top of hollow cylinder 4 to be advisable.On the light path of vertical direction, the light that is produced by ultraviolet source 1 is behind collimation, cylinder 4 (its top can keep apart light in the light path and the liquid in the sample cell) through hollow enters liquid to be measured, pass through the reflection of the film that is all-trans on 2 right-angle sides of prism more successively, impinge perpendicularly on the catoptron 12, enter optical splitter 6 with horizontal direction after reflection, after beam split, detect the light intensity of the wavelength that will measure by detecting device 7.

Claims

1, the on-line automatic analysis recorder of a kind of liquid UV light comprises: a ultraviolet source (1), an optical splitter (6), a detecting device (7) and sample cell (8) is characterized in that:

On the light path of vertical direction, be arranged in order ultraviolet source (1) from top to bottom, calibration pool (11), the cylinder of one hollow (4), the bottom of the cylinder of this hollow (4) is the isosceles right angle prism of a quartz, one piezoid (9) is set in the cylinder of the hollow above the isosceles right angle prism (4), on the barrel between piezoid (9) and this isosceles right angle prism, several apertures is arranged, make that measured liquid can the free flow mistake; The hypotenuse of described isosceles right angle prism is parallel with piezoid (9), and 2 right-angle side outsides are coated with the film that is all-trans; The bottom of described calibration pool (11) is the isosceles right angle prism of a quartz identical with described isosceles right angle prism, and top is the quartz cell of a hollow;

On the light path in the horizontal direction, be arranged in order the catoptron (12) that is miter angle with horizontal line from left to right, optical splitter (6) and detecting device (7).