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Method for ultra-sensitive detection of imidacloprid based on C<60> ratio Raman enhancement

A sensitive detection technology for imidacloprid, which is applied in the field of Raman spectroscopy analysis and detection, can solve the problems of low detection limit and complicated detection process of imidacloprid, and achieve the effect of simple operation

Active Publication Date: 2019-09-17
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is just to provide a kind of based on C in order to solve above-mentioned problem 60 Proportional Raman-enhanced ultra-sensitive method for detecting imidacloprid to solve the technical defects of the existing Raman spectroscopy technology for detecting imidacloprid with complex process and low detection limit

Method used

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  • Method for ultra-sensitive detection of imidacloprid based on C&lt;60&gt; ratio Raman enhancement
  • Method for ultra-sensitive detection of imidacloprid based on C&lt;60&gt; ratio Raman enhancement
  • Method for ultra-sensitive detection of imidacloprid based on C&lt;60&gt; ratio Raman enhancement

Examples

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Embodiment 1

[0033] This example provides C 60 The method of proportional Raman enhanced ultra-sensitive detection of imidacloprid includes the following steps:

[0034] (1)C 60 Mixed with R6G double reporter molecule ratio: preparation C 60 Concentration is 4×10 -5 mol / L 10mL standard solution and R6G concentration is 4×10 -7 mol / L 10mL standard solution, then mix the two with each other, and ultrasound to make the mixture uniform.

[0035] (2)C 60 , R6G and imidacloprid series concentration mix: preparation series imidacloprid concentration (10 -9 , 10 -8 , 10 -7 , 10 -6 , 10 -5 , 10 -4 And 10 -3 mol / L) standard solution, respectively take out 5mL solution and add it to the above-mentioned (1) mixed solution, ultrasonically shake to make it evenly dispersed, and then use a pipette to drop 5uL on the SERS substrate, and then perform SERS detection after drying.

[0036] Test case 1 condition C 60 And R6G and different concentrations of imidacloprid solution SERS peak intensity effects, such as f...

Embodiment 2

[0040] To verify C 60 And R6G double reporter molecule for the selectivity of imidacloprid, this example provides a method based on C 60 Proportional Raman enhancement method for detecting different pesticide concentrations includes the following steps:

[0041] (1)C 60 Mixed with R6G double reporter molecule ratio: preparation C 60 The concentration is 8×10 -5 mol / L 5mL standard solution and R6G concentration is 8×10 -7 mol / L 10mL standard solution, then mix the two with each other, and ultrasound to make the mixture uniform.

[0042] (2) The preparation concentration is 10 -4 mol / L of 5mL different pesticide standard solutions (Imidacloprid, Atrazine, Acetamiprid, Glyphosate, Chlorpyrifos and Parathion), then take 5mL of different pesticide solutions and add C 60 And R6G mixture, ultrasonic vibration to make it fully mixed, and then respectively use a pipette to drop 5uL on the SERS substrate, dry and perform SERS detection.

[0043] The SERS spectra obtained from the above results ...

Embodiment 3

[0045] This embodiment provides a C 60 The method of proportional Raman enhanced ultra-sensitive detection of imidacloprid includes the following steps:

[0046] (1)C 60 Mixed with R6G double reporter molecule ratio: preparation C 60 The concentration is 8×10 -5 mol / L 6mL standard solution and R6G concentration is 5×10 -7 mol / L 10mL standard solution, then mix the two with each other, and ultrasound to make the mixture uniform.

[0047] (2)C 60 , R6G and imidacloprid series concentration mix: preparation series imidacloprid concentration (10 -9 , 10 -8 , 10 -7 , 10 -6 , 10 -5 , 10 -4 And 10 -3 Take out 5mL of the standard solution of M) and add it to the above-mentioned (1) mixed solution, sonicate it to make it evenly dispersed, and then use a pipette to drop 5uL onto the SERS substrate. After drying, perform SERS detection.

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Abstract

The invention discloses a method for ultra-sensitive detection of imidacloprid based on C<60> ratio Raman enhancement. Mixing is executed according to proper concentration ratio of f C<60> and R6G, Raman detection only displays a characteristic peak of C<60> and R6G, then, to-be-detected imidacloprid solution is properly added and Raman detection is executed, a main characteristic peak of C<60> disappears, and peak intensity of R6G increases with increase of concentration of the imidacloprid. Thus, concentration of the imidacloprid can be determined according to Raman spectrum peak intensity change correlation of R6G, the lowest limit of detection can be 10<-9> mol / L, and ultra-sensitive detection of the imidacloprid is realized. The method provided by the invention has the advantages of providing a new Raman detection method, having an effect of ultra-sensitive detection of the imidacloprid, being capable of being applied to detection of a target compound which has no Raman signal or has weaker Raman signals, and developing new thought for further research on detection of farm chemicals with a Raman spectrum technology.

Description

Technical field [0001] The invention belongs to the technical field of Raman spectrum analysis and detection, and specifically relates to a C 60 Proportional Raman enhances the ultra-sensitive detection of imidacloprid. Background technique [0002] Imidacloprid is a systemic, high-efficiency and long-lasting agricultural fine neonicotinoid insecticide. It mainly acts on insect nicotinic acid acetylcholinease receptors and is widely used to control aphids, foliar and soil pests. But imidacloprid can also cause sleepiness, palpitations, and vomiting. In severe cases, it can cause bradycardia and cardiopulmonary arrest, and has serious toxic side effects. Therefore, rapid detection and analysis of imidacloprid in water is of great significance. [0003] Surface enhancement of Raman scattering (SERS) has the advantages of fast detection speed, short detection time, low water interference, and no need for complex processing of samples, and has broad development prospects. Xiaolin Cao ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65G01N1/38
CPCG01N1/38G01N21/658
Inventor 唐建设唐曦璞项丽吴焕乐崔兆行严政王一
Owner ANHUI UNIVERSITY OF ARCHITECTURE