Method for evaluating 'double-way linearity and balance' performance of electric detection system of spectrometer

A technology of electrical detection and spectral lines, which is used in the measurement of color/spectral characteristics, complex mathematical operations, etc., to achieve the effect of improving detection performance

Inactive Publication Date: 2009-04-15
SHANGHAI SPECTRUM INSTR
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Problems solved by technology

[0008] At home and abroad, there is no report on the method of using "mercury lamp-potassium dichromate" non-standard gradient measurement to evaluate the "dual-channel linearity and balance" performance of the electrical detection system of atomic absorption spectrometers

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  • Method for evaluating 'double-way linearity and balance' performance of electric detection system of spectrometer
  • Method for evaluating 'double-way linearity and balance' performance of electric detection system of spectrometer
  • Method for evaluating 'double-way linearity and balance' performance of electric detection system of spectrometer

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[0045] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0046] From figure 1 It can be seen from the figure that 253.8nm is the peak wavelength detected after full-wavelength scanning of the Hg lamp; as can be seen in this figure, the energy of other spectral lines outside the 253.8nm of the Hg lamp is relatively weak, and the influence of stray light can be ignored when measuring at this wavelength . At the same time, the use of stray light standard materials to detect stray light shows that the stray light ratio of the spectral line of the Hg lamp at 253.7nm is less than 0.1%. Therefore, the line shape of the Hg lamp measuring instrument can directly reflect the linearity of the electrical detection system of the instrument.

[0047] The method for evaluating the performance of the "dual-channel l...

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Abstract

The invention discloses a method which is applied to an atomic absorption spectrometer and is used for evaluating the performance of dual-channel linearity and balance of an electric detection system. The invention is characterized in that the performance of the dual-channel linearity and balance of the electric detection system for the atomic absorption spectrometer is evaluated by using a mercury lamp-potassium dichromate non-standard gradient measurement method and a mathematical model thereof. By using the characteristics of the stray light of the mercury lamp and the gradient measurement method, the standard substance is not required, therefore, the operation is simple and rapid, the mathematical reasoning is strict, the result is correct, and meanwhile, the sample channel linearity, the reference channel linearity and the dual-channel balancing performance index can be enhanced. The invention leads the quantitative and rapid evaluation on the electric detection system for the atomic absorption spectrometer to be possible, meanwhile, provides the rapid, correct and economical method and the mathematical model for the self-checking and the measurement of the detection system for the spectrometer and also provides a direction for enhancing the detection performance of the spectrometer.

Description

technical field [0001] The invention belongs to the field of spectroscopic analysis instruments, in particular to a detection and evaluation method for an electrical detection system of an atomic absorption spectrometer, in particular to a "dual Road linearity and balance" performance method. Background technique [0002] Since the 1950s, the Australian physicist Walsh first proposed the application of atomic absorption spectroscopy to chemical analysis, and it has become one of the most important tools for element quantitative analysis and is widely used in various analysis fields. Due to the severe background interference often encountered in sample analysis, background absorption needs to be accurately deducted. Commonly used background correction methods include deuterium lamp background correction, Zeeman effect background correction, and self-absorption background correction. Deuterium lamp background correction, Zeeman effect background correction, and self-absorptio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G06F17/11
Inventor 刘志高刘瑶函
Owner SHANGHAI SPECTRUM INSTR
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