Dual flame burner head optical path atomic absorption device

Abstract

This invention discloses a dual-flame combustion head optical path atomic absorption device, comprising an element lamp and a device mechanism. The device mechanism includes a deuterium lamp, a semi-transparent mirror, a condenser lens, a split-fiber optic cable, a chopper, a combustion head, a condenser lens, a two-in-one fiber optic cable, and a monochromator. This invention utilizes the combined use of the condenser lens, deuterium lamp, semi-transparent mirror, split-fiber optic cable, chopper, two-in-one fiber optic cable, and monochromator. The element lamp light source passes through the condenser lens (if a deuterium lamp is used, a semi-transparent mirror is added), and is then split into two beams by the split-fiber optic cable. Each beam is focused by the condenser lens, passes through the chopper, and then passes through the combustion head. One beam does not enter the sample but serves as a reference light to subtract the background. The two beams are then focused by the condenser lens and transmitted through the two-in-one fiber optic cable to the monochromator. This invention solves the problems of weak transmission performance, high light loss, large spatial limitations in structural layout, and insufficient corrosion resistance.

Description

Technical Field

[0001] This utility model relates to the field of instrument optical path technology, specifically a dual-flame combustion head optical path atomic absorption device. Background Technology

[0002] Background signals are mainly caused by factors such as fluctuations in the light source itself, surface reflection of optical components, and chemical background (absorption by other elements in the flame or other atomization devices). These factors result in a certain basic signal still existing in the optical path even when no sample is added. In the design of atomic absorption optical paths, transmitting dual-path spectra through optical fibers paired with different optical lenses, and employing dual combustion heads, can improve detection stability, reduce noise and drift, and achieve better results in background subtraction. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a dual-flame combustion head optical path atomic absorption device, which uses a combination of optical fiber and optical lens for transmission, and combined with a dual-flame combustion head atomizer, to improve detection stability, reduce noise and drift, and achieve better background subtraction. This solves the problems of weak transmission performance, high light loss, large spatial limitations in structural layout, and insufficient corrosion resistance.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dual-flame combustion head optical path atomic absorption device, comprising element lamps:

[0005] Its features are:

[0006] The device mechanism includes a deuterium lamp, a semi-transparent and semi-reflective mirror, a first condenser lens, a split-type optical fiber, a second condenser lens, a chopper, a burner head, a third condenser lens, a two-in-one optical fiber, and a monochromator.

[0007] In a preferred embodiment of this invention, the element lamp spectral beam is focused by a first focusing lens and then split into two paths by a splitter fiber.

[0008] In a preferred embodiment of this invention, the two spectral beams are focused by the second focusing lens and then pass through the chopper and the combustion head.

[0009] In a preferred embodiment of this invention, the light beam passing through the combustion head is then focused by a third focusing lens and transmitted to the monochromator via a two-in-one optical fiber.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model uses a combination of a condenser lens, a deuterium lamp, a semi-transparent and semi-reflective mirror, a 1-to-2 fiber optic cable, a chopper, a 2-in-1 fiber optic cable, and a monochromator. The element lamp light source passes through the first condenser lens. If a deuterium lamp is used, a semi-transparent and semi-reflective mirror needs to be added. The light is then split into two beams by the 1-to-2 fiber optic cable. The two beams are focused by the second condenser lens, pass through the chopper, and then pass through the combustion head. One of the beams does not enter the sample but serves as a reference light to subtract the background. The two beams are focused by the third condenser lens and then transmitted through the 2-in-1 fiber optic cable into the monochromator. This solves the problems of weak transmission performance, high light loss, large spatial constraints on structural layout, and insufficient corrosion resistance.

[0012] 2. This utility model uses a condensing lens and a split-to-two optical fiber. All condensing lenses are made of quartz. Quartz has excellent transparency. Generally speaking, the light transmission range of quartz can cover the range from ultraviolet light to visible light and even near-infrared light. Especially in the ultraviolet spectrum, its transmission performance is very good. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] In the diagram: 1. Element lamp; 1a. Device mechanism; 2. Deuterium lamp; 3. Semi-transparent mirror; 4. First condenser lens; 5. One-to-two optical fiber; 6. Second condenser lens; 7. Second condenser lens; 8. Chopper; 9. Combustion head; 10. Combustion head; 11. Third condenser lens; 12. Third condenser lens; 13. Two-in-one optical fiber; 14. Monochromator. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 As shown, the present invention provides a dual-flame combustion head optical path atomic absorption device, including element lamp 1:

[0017] The device mechanism 1a includes a deuterium lamp 2, a semi-transparent and semi-reflective mirror 3, a first condenser lens 4, a split-fiber 5, a second condenser lens 6 and 7, a chopper 8, a burner head 9 and 10, a third condenser lens 11 and 12, a two-in-one fiber 13, and a monochromator 14.

[0018] refer to Figure 1The spectral beam of element lamp 1 is focused by the first focusing lens 4 and then split into two paths by the split-beam fiber 5.

[0019] As a technical optimization of this utility model, by setting up a condensing lens and a split-to-two optical fiber, all condensing lenses are made of quartz lenses. Quartz has excellent transparency. Generally speaking, the light transmission range of quartz can cover the range from ultraviolet light to visible light and even near-infrared light. Especially in the ultraviolet spectral range, its transmission performance is very good.

[0020] refer to Figure 1 The spectral beams, split into two paths, are focused by the second focusing lenses 6 and 7, and then pass through the chopper 8 and the burner heads 9 and 10.

[0021] As a technical optimization of this utility model, the optical fiber is made of quartz fiber through the setting of the second focusing lens 6, 7, the chopper 8 and the combustion head 9, 10. It has excellent high temperature resistance and excellent transmittance in the ultraviolet spectrum range. Moreover, the use of optical fiber can reduce the number of lenses, reduce light loss, and the structural layout is less restricted by space, which is more conducive to the miniaturization of the instrument and the expansion of more functions.

[0022] refer to Figure 1 The light beams passing through the burner heads 9 and 10 are then focused by the third focusing lenses 11 and 12 and transmitted to the monochromator 14 via the two-in-one optical fiber 13.

[0023] As a technical optimization of this utility model, by setting up the third focusing lens 11, 12, the two-in-one optical fiber 13 and the monochromator 14, the combustion head 9, 10 is made of titanium metal material, which does not contain other common elements, reducing interference factors and having excellent corrosion resistance.

[0024] The working principle and usage process of this utility model are as follows: During use, the element lamp light source passes through the first focusing lens 4. When using the deuterium lamp 2, the semi-transparent mirror 3 is simultaneously added. The focused beams from the element lamp 1 and the deuterium lamp are split into two beams by a split-beam fiber 5. These two beams are then focused by the second focusing lens 6, and pass through the chopper 8 and the burner head 9. One of the non-sampled beams serves as a reference beam. The two beams are then focused by the third focusing lens 12 and transmitted through a two-in-one fiber 13 to the monochromator 14. The chopper 8 then cuts the light. The chopper frequency is related to the signal strength. The sampling frequencies are matched. When background correction is enabled, deuterium lamp 2 and element lamp 1 are turned on at different times. The light is passed through and blocked by the rotation of the chopper 8, thereby generating four spectral signals, namely deuterium lamp sample light, deuterium lamp reference light, element lamp sample light and element reference light. The non-sampled light is used as the reference light. Through light intensity calculation and subtraction, the background is eliminated and the influence of light signal drift caused by light source intensity changes and other factors on the measurement results is reduced. The dual combustion head 9 also eliminates the background influence generated by the atomization process.

[0025] In summary, this dual-flame burner optical path atomic absorption device, through the coordinated use of element lamp 1, device mechanism 1a, deuterium lamp 2, semi-transparent and semi-reflective mirror 3, first condenser lens 4, split-fiber 5, second condenser lens 6 and 7, chopper 8, burner head 9 and 10, third condenser lens 11 and 12, two-in-one fiber 13 and monochromator 14, solves the problems of weak transmission performance, large light loss, large spatial limitation of structural layout and insufficient corrosion resistance.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-flame combustion head optical path atomic absorption device, comprising an element lamp (1): Its features are: The device mechanism (1a) includes a deuterium lamp (2), a semi-transparent mirror (3), a first condenser lens (4), a split-fiber (5), a second condenser lens (6, 7), a chopper (8), a burner head (9, 10), a third condenser lens (11, 12), a two-in-one fiber (13), and a monochromator (14).

2. A dual flame burner head optical atomic absorption apparatus as defined in claim 1, wherein: The spectral beam of the element lamp (1) is focused by the first focusing lens (4) and then split into two paths by a split-beam fiber (5).

3. A dual flame burner head optical atomic absorption apparatus as defined in claim 2, wherein: The two beams of light are divided into two paths and focused by the second focusing lens (6, 7), then pass through the chopper (8) and the burner head (9, 10).

4. A dual flame burner head optical atomic absorption apparatus as defined in claim 3, wherein: The light beam passing through the burner head (9, 10) is then focused by the third focusing lens (11, 12) and transmitted to the monochromator (14) through the two-in-one optical fiber (13).

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