Polyester fiber membrane-based ratio type fluorescent paper chip as well as preparation method and application thereof

Abstract

The invention discloses a polyester fiber membrane-based ratio type fluorescent paper chip as well as a preparation method and an application thereof, and belongs to the technical field of material science engineering and micro-fluidic chips. CdTe QDs and RhB are sequentially grafted to the surface of a polyester fiber membrane, and then 2, 4-D print holes are formed in the surface of the polyester fiber membrane by adopting a surface molecular imprinting technique to prepare fluorescent molecularly imprinted paper; and the fluorescent molecularly imprinted paper is mounted on a carrier to prepare the ratio type fluorescent paper chip. The method uses two kinds of fluorescence, and compared with a single fluorescent paper chip, inherent self-correction can be achieved, so that the detection result is more clear and accurate; the method has the advantages of simple pretreatment, detection can be carried out by performing simple cleaning, crushing and filtering on fruits and vegetables,the fluorescent paper chip can be used for 2, 4-D rapid auxiliary detection of complex fruit and vegetable samples, and no more limitation is on the types of the tested samples; the detection time isshort, the operation is simple and convenient, and the carrying is convenient; and the polyester fiber paper is used as a substrate, so that the cost is reduced, and the method is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical fields of material science engineering and microfluidic chips, and in particular relates to a ratio-type fluorescent paper chip based on a polyester fiber film, a preparation method and an application. Background technique [0002] 2,4-Dichlorophenoxyacetic acid (2,4-D) is a phenoxyacetic acid plant growth regulator, which regulates metabolism by stimulating plant growth, and is often used in fruits and vegetables. However, because it is difficult to degrade and easily remains in fruits and vegetables, it may directly or indirectly enter the human body through the food chain and pose a threat to human health, so the detection of 2,4-D in fruits and vegetables is of great significance. [0003] The commonly used 2,4-D detection technology is high-performance liquid chromatography, but this method is difficult to popularize due to the precision and expensive equipment, long detection time, and complicated pretreatme...

AI Technical Summary

Problems solved by technology

However, because it is difficult to degrade and easily remains in fruits and vegetables, it may directly or indirectly enter the human body through the food chain and pose a threat to human health, so the detection of 2,4-D in fruits and vegetables is of great significance

[0003] The commonly used 2,4-D detection technology is high-performance liquid chromatography, but this method is difficult to popularize due to the precision and expensive equipment, long detection time, and complicated pretreatment, which seriously limits the detection application of 2,4-D. From the above, it can be seen that 2,4-D is very likely to remain in fruits and vegetables, and will cause harm to the human body. Therefore, it is very important to establish a 2,4-D detection method that is efficient, convenient, portable, low-cost and environmentally friendly. Necessary

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