Chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform

A dual-tree complex wavelet and overlapping peak technology, applied in the field of spectrum processing, can solve the problems that the overlapping peak signal cannot accurately reflect the peak position and area characteristics, cannot accurately separate and reconstruct the original signal, and the peak shape is prone to distortion. Achieve the effects that are conducive to accurate analysis and processing, suppress aliasing, and run fast

Inactive Publication Date: 2016-06-15
SOUTHEAST UNIV
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Problems solved by technology

[0007] In view of the poor anti-aliasing performance of the classical discrete wavelet transform in the existing technology, the original signal cannot be accurately separated and reconstructed, which eventually leads to low resolution and easy distortion of the peak shape, and the decomposed overlapping peak signal cannot accurately reflect the peak position characteristics and area charac

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  • Chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform
  • Chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform
  • Chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform

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[0037] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0038] Such as Figure 1-6 As shown, the present invention is based on the double-tree complex wavelet transform chromatographic overlapped peak decomposition method, using the double-tree complex wavelet to decompose and reconstruct the overlapped peak signal, specifically including the following steps:

[0039] figure 1 Is the flow chart of the implementation of the present invention, figure 2 It is the amino acid chromatogram measured in the experiment.

[0040] Step 1. Acquisition and preprocessing of chromatographic signal: Use a chromatograph to acquire the chromatographic signal, and perform moving average filtering and baseline subtraction on the collected spectrum to obtain the signal f. The spectrum is as follows image 3 Shown.

[0041] by image 3 There are five sets of obvious overlapping peaks in the sampling point range of [4985,7512], [13975,17152]...

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Abstract

The invention discloses a chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform; dual-tree complex wavelet transform is mainly adopted for decomposing chromatographic signals, and chromatographic overlapping peaks are separated by means of amplifying detail coefficients to reconstruct the signals. The method includes the steps of acquisition and preprocessing of the chromatographic signals, dual-tree complex wavelet decomposition and extraction of the detail coefficients, amplification of the detail coefficients, dual-tree complex wavelet reconstruction, and sidelobe suppression and reduction of spectra. Results show that the dual-tree complex wavelet transform effectively overcomes the disadvantages of poor aliasing resistance and translation sensitivity of traditional discrete wavelet transform, the effect of decomposition of the overlapping signals is better than that of a general real wavelet, and the accuracy of original spectrum peak characteristics and quantitative and qualitative analysis is ensured.

Description

technical field [0001] The invention belongs to the technical field of spectrum processing, and relates to a method for decomposing overlapping peaks based on dual-tree complex wavelet transform. Background technique [0002] Chromatography, also known as chromatographic analysis, chromatographic analysis, and chromatography, is a separation and analysis method that is widely used in analytical chemistry, organic chemistry, biochemistry and other fields. In recent years, with the improvement of chromatographic separation technology, chemical substances can be effectively separated. Quantitative and qualitative analysis of experimental samples is the most critical step in chromatographic analysis. The resolution of overlapping peaks has a great influence on the quantitative and qualitative analysis of chromatography. [0003] At present, there are many methods for overlapping peak decomposition, such as curve fitting, Fourier transform, derivative method, wavelet transform,...

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Application Information

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IPC IPC(8): G01N30/86
CPCG01N30/86
Inventor 王爱民徐龙
Owner SOUTHEAST UNIV
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