Micro near-infrared spectral analytical method based on enrichment of integrated material

Abstract

The invention relates to a micro near-infrared spectral analytical method based on enrichment of an integrated material, which comprises the following steps: the in-situ polymerization is carried outon the integrated material for enrichment in an enrichment device or a fixed mould; the material is modified according to needs; the thickness of the in-situ polymerization material is 5-10 mm; as forthe material previously synthesized in the mould, the integrated material is cut into round slices with the thickness of 5-10 mm; the integrated material round slice is fixed on one end of the deviceby adhesive or a physical cutting ferrule and aligned with the edge; and after the enrichment, the near-infrared spectrum of the material surface with concentrated analytical components is measured in a scattered reflection mode. The method enhances the effects of purification and enrichment, realizes the near-infrared spectral direction measurement of the material surface after the enrichment, enhances the analytical sensitivity, achieves the goal of the near-infrared spectral analysis on the micro substances and realizes the indirect measurement of metallic elements by using a near-infraredspectrum. The material can be repetitively used with basically unchanged effects of absorption and enrichment.

Description

【Technical field】 [0001] The invention mainly relates to the field of sample pretreatment of analytical chemistry, specifically, a micro-near-infrared spectral analysis method based on overall material enrichment. 【Background technique】 [0002] Near-infrared spectral analysis technology is the fastest-growing spectral analysis technology in recent years. Its outstanding advantages are no need for sample preparation, easy operation, non-destructive analysis, and no consumption of reagents. These have made this technology widely used in more and more fields. application, and has a good application prospect. However, the analytical sensitivity of near-infrared spectroscopy is not high, and it is not suitable for the detection of low content components, so it is considered as a constant analysis technique. In addition, since inorganic elements have no obvious absorption on near-infrared spectra, metal elements cannot be directly determined by near-infrared spectroscopy. The m...

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Problems solved by technology

However, the analytical sensitivity of near-infrared spectroscopy is not high, and it is not suitable for the detection of low content components, so it is considered as a constant analysis technique

In addition, since inorganic elements have no obvious absorption to near-infrared spectra, metal elements cannot be directly determined by near-infrared spectroscopy. The metal elements in the samples measured by the method have been combined with the sample matrix in complex derivative forms such as complexation and chelation during the long-term growth of crops. The determination of metal elements is actually by measuring Together the organic matrix achieves

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