Research on highly selective multi-component printing molecularly imprinted paper chip fluorescence sensor and on-site detecting application

Abstract

The invention discloses a highly selective multi-component printing molecularly imprinted paper chip fluorescence sensor and a method for detecting heavy metal ions with the sensor. A fabrication method of the printing molecularly imprinted paper chip fluorescence sensor comprises the following steps: selecting functional monomers corresponding to the metal ions, fabricating quantum dots, preparing quantum dot molecularly imprinted mixed solutions according to documents, printing the quantum dot molecularly imprinted mixed solutions of the different metal ions on paper with a printer, conducting ultraviolet radiation, and fabricating the printing molecularly imprinted paper chip fluorescence sensor. The highly selective multi-component method for simultaneously detecting heavy metal ion pollutants comprises the following steps: soaking the fabricated printing molecularly imprinted paper chip fluorescence sensor into a water body sample, soaking the sensor fully with a short-wave transmission saturated fluorescence reagent, and detecting the heavy metal ions in the sample. The sensor is high in specificity, high in sensitivity, short in detecting time, low in cost and convenient to handle. The fluorescence detection method for the heavy metal ions is simple and quick to operate, and reactions and results are completed and recorded by an instrument automatically.

Description

technical field [0001] The present invention relates to the technical field of on-site rapid and highly selective detection of heavy metal ions, and more specifically to the preparation of a printed molecular imprinted paper chip fluorescent sensor for detecting heavy metal ion pollutants in water bodies. The present invention also relates to the use of the printed molecular imprinted On-site detection of heavy metal ions in samples by paper chip fluorescence sensor. Background technique [0002] With the development of industry and agriculture, the amount of sewage has gradually increased, and a large number of metal ion pollutants have entered the water body, becoming one of the main environmental pollutants. Water pollution by heavy metals has become a global environmental problem. Among the 129 priority pollutants announced by the US EPA, there are 12 heavy metals and their compounds. The heavy metal pollutants that are often said mainly refer to elements with signific...

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Problems solved by technology

[0004]At present, the commonly used detection methods for heavy metals are graphite furnace atomic absorption spectrometry, ICP-AES, X-ray fluorescence spectrometry, etc. Although these detection methods can accurately measure the However, the detection is relatively laborious, time-consuming and expensive, and requires a large amount of sample pretreatment, and the detection of samples needs to be carried out in the room of large-scale analysis equipment, which cannot be used for on-site detection

Due to the limitations of the above shortcomings, the number of samples tested is generally less than the optimal number of tests, resulting in greater uncertainty in the subsequent evaluation of the degree and risk of heavy metal pollution

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