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A method and device for measuring a trace metal ion concentration

A technology for trace metal and ion concentration, applied in the field of UV-Vis spectroscopy quantitative analysis, can solve the problems of poor additivity, overlapping detection signals, strong nonlinearity, etc., to reduce the number of variables, reduce interference, improve accuracy and real-time sexual effect

Active Publication Date: 2017-07-04
CENT SOUTH UNIV
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Problems solved by technology

[0006] Aiming at the detection problems such as strong non-linearity, poor summation, overlapping detection signals and other detection problems of trace ions in the mixed solution of multi-metal ions under the background of high concentration ratio, the present invention provides a method and device for measuring the concentration of trace metal ions

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  • A method and device for measuring a trace metal ion concentration
  • A method and device for measuring a trace metal ion concentration
  • A method and device for measuring a trace metal ion concentration

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] figure 1 A schematic flow chart of the method for measuring the concentration of trace metal ions provided by the embodiments of the present invention, such as figure 1 As shown, it includes: S1, according to the absorbance of the solution containing trace metal ions in the whole band, using the predicted root mean square error to obtain the optimal wavelength i...

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Abstract

A method and device for measuring a trace metal ion concentration are provided. The method includes S1) according to absorbance in a full waveband of a solution including a trace metal ion, acquiring an optimum wavelength zone in the full waveband by utilizing a root mean square error of prediction; and S2) acquiring an effective wavelength point for measuring the concentration of the trace metal ion in the optimum wavelength zone through a correlation coefficient process. Through adoption of an interval-correlation coefficient partial least squares process, sensitive zones of high-concentration matrix ions and a blank information zone are rapidly and efficiently removed, wavelength points which are high in nonlinearity, low in information quantity and masked by matrix ions are rejected, complete usable information of the trace ion to be detected is maintained to the utmost, interferences of the high-concentration matrix ions on the trace ion to be detected are reduced, sensitivity of the trace ion to be detected is maintained, the number of variables is reduced, and precision and real-time performance of a model are improved.

Description

technical field [0001] The invention relates to the field of quantitative analysis of ultraviolet-visible spectra, in particular to a method and a device for measuring the concentration of trace metal ions. Background technique [0002] In the hydrometallurgical process, there are many types of metal ions and large concentration ratios in the feed liquid leachate. The signal masking and overlapping phenomena caused by these metal ions with similar characteristics and coexistence give rise to trace metal ion concentration in the background of high concentration ratio. measurement poses great challenges. [0003] Ultraviolet-visible spectrophotometry is a method for measuring the absorbance of substances in the wavelength range of 190-800nm, which is used for identification, impurity inspection and quantitative determination. In recent years, UV-Vis spectrophotometry has been widely used in the field of analysis and determination of polymetallic ions due to its high sensitivi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G06F17/18G06F17/16G06F17/10
CPCG01N21/31G01N2201/1217G06F17/10G06F17/16G06F17/18
Inventor 阳春华龚娟吴书君朱红求李勇刚陈俊名
Owner CENT SOUTH UNIV
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