Mid-infrared spectrum portable detecting system capable of simultaneously measuring content of various kinds of heavy metal of plants

Abstract

The invention provides a mid-infrared spectrum portable detecting system capable of simultaneously measuring the content of various kinds of heavy metal of plants, and belongs to the field of detection of the content of heavy metal of the plants. The portable detecting system consists of five parts including sample preparation, spectrum scanning, intelligent detection, result output and work condition guarantee. The functions of mid-infrared spectrum scanning, spectral information identification and digital conversion, spectrum data base building and updating, base building and model buildingthrough machine study and model precision improvement are realized; the one-key type automatic measurement on various heavy elements on the plants is realized. Compared with the prior art, the mid-infrared spectrum portable detecting system has the advantages that the specialty and experience requirements on detection persons are lowered; the time and the expenditure are saved; the reliability andthe accuracy of the detection are improved; the in-situ measurement and the field investigation are convenient.

Description

technical field [0001] The invention relates to the field of detection of heavy metal content in plants, in particular to a mid-infrared spectrum portable detection system and method for simultaneously measuring the content of multiple heavy metals in plant tissues. Background technique [0002] Heavy metal refers to the atomic density greater than 5g / cm 3 A class of metal elements, mainly including Cd, Cr, Hg, Pb, Cu, Zn, Ag, etc. (from the perspective of toxicity, Ae, Se, and Al are generally included), about 45 kinds. As an important natural resource, heavy metals play an important role and value in human production and life. As people continue to increase the development of heavy metals in nature, a large amount of heavy metals will eventually diffuse into the natural ecological environment and become persistent pollutants in the environment. Compared with the pollution of other organic compounds, the fundamental characteristic of heavy metal pollution is that it canno...

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Problems solved by technology

The above method still has the following problems: (1) When the distribution of the samples to be tested is different from the distribution of the modeling samples, it will lead to a large number of errors; (2) It is impossible to adjust the optimal weights of multiple indicators adaptively at the same time. It can measure the content of one heavy metal in plants, but cannot measure the content of multiple heavy metals at the same time, which makes the detection of multiple heavy metals in plants very troublesome; (3) The process of spectrum analysis and library building is complicated, and it is difficult for non-professionals to master

But so far, there has been no report on the intelligent and portable detection of heavy metals in plant tissues using mid-infrared spectroscopy.

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