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Hollow cathode lamp and atomic absorption spectrometer manufactured by hollow cathode lamp

A technology of hollow cathode lamps and hollow cathodes, applied in absorption/flicker/reflection spectra, components of gas discharge lamps, color/spectral characteristics measurement, etc. Analyze issues such as time to achieve the effect of expanding the amount of information used and improving the speed of analysis

Inactive Publication Date: 2011-09-14
QIQIHAR MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 6 cathodes are lead wires and power supply separately. The cathode that needs to be preheated is used for power supply, and the other cathodes are not powered. Each hollow cathode is the same as a single-element lamp. When used, it rotates around the center of the anode. To measure an element, changing the lamp frequently will limit the analysis speed, information volume and convenience of use.
Jena Company of Germany adopts 300W high-focus short-arc xenon lamp continuous light source as the atomic absorption light source instead of 70 element lamps. Because the spectrum is continuous, it must cooperate with high-resolution echelle double monochromator and high-performance CCD linear array detector (512 Dot matrix) combined use, and the specified absorption spectrum must be measured by wavelength scanning method, which takes up analysis time

Method used

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  • Hollow cathode lamp and atomic absorption spectrometer manufactured by hollow cathode lamp
  • Hollow cathode lamp and atomic absorption spectrometer manufactured by hollow cathode lamp
  • Hollow cathode lamp and atomic absorption spectrometer manufactured by hollow cathode lamp

Examples

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example 1

[0020] Such as figure 1 As shown, the hollow cathode lamp 1 of the present invention includes a plurality of hollow cathode filaments 2, one hollow cathode filament 2 is made of one alloy, each hollow cathode filament 2 on a hollow cathode lamp uses a different alloy, each alloy It contains a variety of elements, and there are 5 types of elements. The element composition of the alloy is selected according to the boiling point of the element and the application. In the hollow cathode lamp, a plurality of hollow cathode filaments 2 are equidistantly arranged on the same optical axis, and a plurality of hollow anode rings 3 are inserted between the plurality of hollow cathode filaments 2. The number of hollow cathode filaments 2 depends on the number of elements to be measured. Determined to be 10 species. The cathode lead wire 4 of the hollow cathode filament 2 and the anode lead wire 5 of the hollow anode ring 3 are led out from one end of the hollow cathode lamp 1 .

[0021]...

example 2

[0025] Such as figure 2 As shown, the installation and setting positions of the components of the atomic absorption spectrometer containing the hollow cathode lamp 1 of the present invention are: the sharp line emitting end of the hollow cathode lamp 1 points to the concave reflector 6, and the two-dimensional sharp line emitted by it passes through the concave reflector 6 is reflected on the concave reflector 7 of the seam, and the two-dimensional sharp line focal point between the concave reflector 6 and the concave mirror 7 of the seam is equipped with a flame or a graphite furnace center 8, which is reflected by the concave reflector 7 of the seam The two-dimensional sharp lines are focused at the entrance slit and spread out on the flat-field concave grating 9 , and all the sharp lines pass through the dispersion of the flat-field concave grating 9 and are focused between the two ends of the linear diode array detector 10 .

[0026] The diode array detector is equipped w...

example 3

[0028] This example is a sequential all sharp line signal strength receiving device.

[0029] The core of the sequential all-sharp-line signal strength receiving device in the diode array detector is a set of software system, including TDAA interface software and spectral data collection and compilation software compiled with VB6.0, and the two sets of software share a set of communication protocols. According to the linear relationship between the dot matrix number and the sharp line wavelength, the dot matrix summary table corresponding to the sharp line wavelength is preset. The function of the control circuit board is to sequentially provide sequential pulse voltages for TDHCL, and according to the discrete signal in the method The calculation formula of absorbance intensity detection time is tmn = i(tc-1) + mtc / M - 0.25tc / M to calculate the sampling time, all absorbance intensity is converted from analog to digital, and all data are stored in two-dimensional subscript vari...

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Abstract

The invention discloses a hollow cathode lamp and an atomic absorption spectrometer manufactured by the hollow cathode lamp. The hollow cathode lamp comprises a plurality of hollow cathode lamp filaments, wherein each hollow cathode lamp filament is made of alloy; the hollow cathode lamp filaments on the hollow cathode lamp are made of different kinds of alloy, and each alloy contains multiple elements; the plurality of hollow cathode lamp filaments are arranged on the same optical principal axis equidistantly; and a plurality of hollow anode rings are inserted among the plurality of hollow cathode lamp filaments. The atomic absorption spectrometer with the hollow cathode lamp consists of a concave surface reflector, a seam-in concave surface reflector, a flame or graphite furnace center,a flat field concave surface grating and a diode array detector. The invention has the advantages that: the hollow cathode lamp and the atomic absorption spectrometer can generate sharp lines with two-dimensional quantity, and break through the obstruction that the hollow cathode lamp is needed to be replaced once when one element is measured in the technical field of atomic absorption at home and abroad, and a plurality of elements are measured by primary sample introduction simultaneously.

Description

technical field [0001] The invention relates to a hollow cathode lamp, and also relates to an atomic absorption spectrometer made of the hollow cathode lamp. Background technique [0002] The single-element hollow cathode lamp (HCL) is the most commonly used and important light source in the atomic absorption analysis method, but the HCL needs to be replaced every time an element is measured. Photron company has developed a multi-element lamp, 6 hollow cathode wicks are evenly distributed on the same circumferential plane in the lamp housing with a diameter of 50mm, and the center is a common multi-anode. The 6 cathodes are lead wires and power supply separately. The cathode that needs to be preheated is used for power supply, and the other cathodes are not powered. Each hollow cathode is the same as a single-element lamp. When used, it rotates around the center of the anode. When measuring an element, changing the lamp frequently will limit the analysis speed, information ...

Claims

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Application Information

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IPC IPC(8): H01J61/09G01J3/42G01N21/31
Inventor 张榕谭雪飞秦伟刘娜陈琳
Owner QIQIHAR MEDICAL UNIVERSITY
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