Spectrum peak analysis method and device applied to gas chromatography

Abstract

The invention discloses a spectrum peak analysis method and device applied to gas chromatography, the device comprises a data acquisition unit, a baseline noise reduction module, a calibration fitting module and a spectrum peak analysis unit, the data acquisition unit is connected with the baseline noise reduction module, the baseline noise reduction module is connected with the calibration fitting module, the calibration fitting module is connected with the spectrum peak analysis unit, the data acquisition unit comprises an A / D conversion module, a data filtering module and a slave communication module, and the spectrum peak analysis unit comprises a spectrum peak identification module, a baseline correction module and a quantitative analysis module. The method is especially suitable for spectrum peak analysis of a chromatographic curve with much jitter; the detection limit and the repeatability of the detected benzene series are both smaller than the national standard; the accuracy on peak height analysis is relatively high; and the method has adaptability, can accurately identify different curves of different substance components, and also can effectively identify irregular chromatographic curves appearing when substances in air are detected.

Description

technical field [0001] The invention relates to the technical field of chromatographic peak analysis, in particular to a spectral peak analysis method and device applied to gas chromatography. Background technique [0002] In response to the serious environmental air pollution in our country and the urgent need to monitor VOCs emissions from various polluting industries such as petroleum, chemical industry, electronics, medicine, industrial coating, packaging and printing, etc., gas chromatographs are widely used. A gas chromatograph is an instrument for analyzing and detecting components in a mixed gas. The signal peak at a specific position in the chromatogram generally corresponds to a specific substance. The size of the peak is related to the content of the substance, so it is determined The position and size of the spectral peak is the key to the analysis and processing of the spectrum. [0003] Through the study of the principle of chromatographic analysis, we learned...

AI Technical Summary

Problems solved by technology

However, the unstable factors that may occur in the hardware acquisition process of the gas chromatograph, and even after filtering, the capillary noise signal will inevitably appear, which will interfere with the identification of chromatographic peaks

In addition, the peak identification function is frequently called during the chromatographic analysis

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