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Method for calculating and displaying background value of Zeeman background correction atomic absorption

An atomic absorption and background correction technology, applied in the field of background value calculation and display, can solve problems such as not

Inactive Publication Date: 2012-10-24
SHANGHAI HUAZHI SPECTRUM INSTR
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  • Application Information

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Problems solved by technology

[0003] However, the displayed background value is not the real background value. The reason is that no matter whether the alternating magnetic field or the constant magnetic field is used, the reference track absorbance obtained by the measurement contains atomic absorption signals, and they are the absorption of the σ component.

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  • Method for calculating and displaying background value of Zeeman background correction atomic absorption
  • Method for calculating and displaying background value of Zeeman background correction atomic absorption
  • Method for calculating and displaying background value of Zeeman background correction atomic absorption

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Embodiment Construction

[0033] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0034] (1). Establish a calibration curve

[0035] 1. Measure the total absorption signal A of each standard sample total(std) ;Reference track signal A ref(std) , see Table 1 for the data.

[0036] Table 1 shows the example data of the relationship between the absorbance and the concentration of the standard sample beam, the reference beam, and the background correction of the aqueous solution.

[0037] Table 1: Example data of standard sample absorbance vs. concentration

[0038] concentration

C (mg / L)

suction after background correction

Luminosity A

Sample beam absorbance

Degree A total

Reference beam absorbance

Degree A ref

0

0

0

0

1

0.012

0.02

0.008

2

0.024

...

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Abstract

The invention discloses a method for calculating and displaying a background value of Zeeman background correction atomic absorption, which is characterized in that: while a correction curve is set up, calculating, in a fitting manner, the correlation relation between a reference channel absorbance and a background corrected atomic absorption signal, namely calculating Aref=F2(Atotal(std)-Aref(std)), and based on the fitting relation, calculating a real background value at every measurement point, namely calculating Abkg=Aref-F2(Atotal-Aref); the invention provides a method for calculating a background value of Zeeman background correction atomic absorption, which is used for obtaining the real background values of a sample and vividly displaying the magnitude order and the relation amongthree parameters of reference channel absorption, background corrected absorption and real background.

Description

technical field [0001] The invention relates to a method for realizing background value calculation and display, in particular to a background value calculation and display method for realizing Zeeman background correction atomic absorption. Background technique [0002] Zeeman background correction is well known to those skilled in the art as an excellent background correction method. The sample beam measures the total absorption signal, the reference beam measures the background signal, and the two are subtracted to obtain the net atomic absorption signal. Usually Zeeman background corrected instruments display the net atomic absorption signal and background signal after the subtraction of the two, because the background signal is used as the information of the matrix and as a reference for the analysis results. [0003] However, the displayed background value is not the real background value. The reason is that no matter using the alternating magnetic field or the consta...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31G01J3/42
Inventor 刘志高陈建钢杨啸涛
Owner SHANGHAI HUAZHI SPECTRUM INSTR