CN201107273Y

CN201107273Y - Atomic fluorescent spectrometer

Info

Publication number: CN201107273Y
Application number: CNU2007201904085U
Authority: CN
Inventors: 徐进勇; 葛良全; 温晓东; 吴鹏; 蒋小明
Original assignee: Chengdu Univeristy of Technology
Current assignee: Chengdu Univeristy of Technology
Priority date: 2007-11-28
Filing date: 2007-11-28
Publication date: 2008-08-27
Anticipated expiration: 2017-11-28

Abstract

The utility model discloses an atomic fluorescence spectrometer, which comprises a laser light source component, an electrothermal vaporization feeding and atomization component, a fluorescence signal detection component and an embedded type controlling processing circuit system, wherein, the electrothermal vaporization feeding and atomization component comprises a tungsten filament, a temperature programmed power supply, a gas carrying pipeline and a glass envelope, and the tungsten filament is not only taken as a feeding component for measuring elements, but also taken as an atomization component of an instrument. The utility model provides the atomic fluorescence spectrometer with simple structure, a small amount of additional equipment and a great variety of analyzed and tested elements.

Description

A kind of atomic fluorescence spectrometer

Technical field

The utility model relates to a kind of optical measuring device, relates in particular to a kind of atomic fluorescence spectrometer.

Background technology

The chemical evapn generation atomic fluorescence spectrometer (CVG-AFS of widespread use at present, ChemicalVapor Generation Atomic Fluorescence Spectrometer), with inductively coupled plasma atomic emission spectrum (ICP-OES, Iternet Content Provider optical mission specrometry), inductivity coupled plasma mass spectrometry (ICP-MS) compares, and has advantages such as simple in structure, cheap, highly sensitive, that detection limit is low.Successfully be applied in the analysis of various samples, hydride atomic fluorescence spectrometetry instrument (HG-AFS) is current maximum a kind of chemical evapn generation atomic fluorescence spectrophotometry technology of using, also be the top atomic spectrum technology that China has independent intellectual property right, it reveals very high sensitivity for analysis to the list of elements that can produce hydride.As shown in Figure 1, be existing atomic fluorescence spectrophotometry element test and atomizing apparatus figure, existing atomic fluorescence test elements and atomization system are two cover hardware, after the element that atomic fluorescence will be surveyed is introduced by sampling device 1, the test elements of analyzing 2 is sent into atomizing apparatus 3 carry out atomization, and atomizing the time, produce analytic signal, wherein sampling device is mainly by a pump, after the solution suction, send into the atomizing apparatus on the right by pipeline---be exactly a tube furnace that quartz is done, and burned the hydrogen heating in the exit of stove, reach atomizing purpose.Chemical evapn generation atomic fluorescence spectrophotometry also exists significant disadvantages, has limited it and has used widely at analysis field:

1. have only metal, the metalloid element (Hg, Se, As, Cd, Tl, Sb, Bi, Te, Sn, Pb, Zn, Ge etc.) that can produce chemical evapn could be suitable for above-mentioned technology;

2. chemistry of hydrides steam generation atomic fluorescence spectrophotometry when the Analysis of Complex matrix sample, is subjected to the transition metal interference very serious, has also limited its application.

Tungsten filament Electrothermal Atomic fluorescence spectrophotometer can overcome the deficiency of this two aspect of hydride-generation atomic fluorescence more effectively, the application of expansion atomic fluorescence.

Summary of the invention

For solving problem and the defective that exists in above-mentioned, the utility model provides a kind of kind that adopts tungsten filament as Electrothermal Atomic fluorescence spectrophotometer analytical element, and this atomic fluorescence spectrometer is simple in structure, volume is little and be easy to carry.

The utility model is achieved through the following technical solutions:

Atomic fluorescence spectrometer comprises the excitation source parts, electric heating evaporation sample introduction and atomization parts, fluorescence signal detection part and embedded Control treatment circuit system, described electric heating evaporation sample introduction and atomization parts comprise: tungsten filament, the temperature programme power supply, carrier gas channel and glass outer cover, wherein, one spirality tungsten filament is set on a conical base, and be covered with a glass outer cover in the outside of spirality tungsten filament, respectively there is a columniform passage at the two ends, the left and right sides of described glass outer cover, and respectively have a smaller branch pipe at the downside of two ends passage, also respectively have an aperture with the dead astern directly over the described cloche, the bottom of cloche constitutes with a rectangular pyramid shape face.

Described conical tungsten filament base links to each other with the rectangular pyramid face upper end of cloche bottom, and adopts tungsten filament to introduce the atomization system as the device of test elements, and stating to seal on the aperture of offering in the cloche dead astern has quartz lens.Described fluorescence signal detection part comprises an electric multiplier tube detecting device, and signals collecting that should the electricity multiplier tube and described tungsten filament electric heating temperature programme power circuit system adopt embedded system.

The utility model is introduced the atomization system by adopting tungsten filament as the device of test elements, overcome the restriction that hydride atomic fluorescence spectrometetry must produce this analysis condition of analytical element hydride, the tungsten filament temperature programme produces atomic fluorescence with test analysis element atomization under the effect of excitation source.Tungsten filament Electrothermal Atomic fluorescence spectrophotometer analytic sample kind and analytical element kind are many, and optional equipment is few, volume is little, be easy to carry.

Description of drawings

Fig. 1 is existing atomic fluorescence spectrometer test elements and atomizing apparatus figure;

Fig. 2 is the utility model atomic fluorescence spectrometer test elements and atomizing apparatus figure.

Embodiment

The utility model relates to a kind of atomic fluorescence spectrometer, describes the utility model in detail below in conjunction with accompanying drawing:

As shown in Figure 2, comprise: excitation source parts, electric heating evaporation sample introduction and atomization parts, fluorescence signal detection part and embedded Control treatment circuit system, wherein, the core component of instrument is electric heating evaporation sample introduction and atomization parts, these parts are made of four major parts: tungsten filament 7, program are given birth to warm power supply 12, carrier gas channel 8 and glass outer cover 13, wherein respectively there is a cylindrical channel at the two ends, the left and right sides of cloche 13, and respectively with piezoid 9 and material 14 sealings that absorb ultraviolet, and the downside of two ends passage respectively has a smaller branch pipe, to introduce protection gas; Open an aperture 11 directly over the cloche 13, used for getting rid of gas and advancing detection elements; A hole is opened in the dead astern of cloche 13, and seals up with quartz lens 15, uses for collecting fluorescence; The lower part of cloche 13 constitutes with a rectangular pyramid shape face, and rectangular pyramid face upper end is linked into one with conicity tungsten filament base 10.

After analytical element passes through sample pre-treatments technology (as means such as electro-deposition, ion-exchange, extractions) and complicated substrate separates, introduce the tungsten filament surface directly sample " point " on tungsten filament, heating is carried out atomization with test elements to tungsten filament then, under the exciting of excitation source 5, produce atomic fluorescence, and by photomultiplier 6 detection fluorescence signals, by flush type circuit system handles analytic signal, obtain the content of corresponding tested element then.

The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims

1, a kind of atomic fluorescence spectrometer, comprise: the excitation source parts, electric heating evaporation sample introduction and atomization parts, fluorescence signal detection part and embedded Control treatment circuit system, it is characterized in that, described electric heating evaporation sample introduction and atomization parts comprise: tungsten filament, the temperature programme power supply, carrier gas channel and glass outer cover, wherein, one spirality tungsten filament is set on a conical base, and be covered with a glass outer cover in the outside of spirality tungsten filament, respectively there is a columniform passage at the two ends, the left and right sides of described glass outer cover, and respectively have a smaller branch pipe at the downside of two ends passage, also respectively have an aperture with the dead astern directly over the described cloche, the bottom of cloche constitutes with a rectangular pyramid shape face.

2, atomic fluorescence spectrometer according to claim 1 is characterized in that, described conical tungsten filament base links to each other with the rectangular pyramid face upper end of cloche bottom, and adopts tungsten filament to introduce the atomization parts as the device of test elements.

3, atomic fluorescence spectrometer according to claim 1 is characterized in that, envelope has quartz lens on the aperture that described cloche dead astern is offered.

4, atomic fluorescence spectrometer according to claim 1, it is characterized in that, described fluorescence signal detection part comprises an electric multiplier tube detecting device, and signals collecting that should the electricity multiplier tube and described tungsten filament electric heating temperature programme power circuit system adopt embedded system.