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Tracer composition

A composition and tracer technology, which can be used in biocides, animal repellents, plant growth regulators, etc., can solve expensive, destroyed, time-consuming and other problems

Pending Publication Date: 2021-12-14
切尔西科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is expensive and time-consuming
Additionally, artificial targets may be unrealistic surrogates for leaves, and any crops used in the lab for analysis may need to be destroyed after testing

Method used

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  • Tracer composition
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0147] Example 1 - Determining Suitable Fluorescent Tracers

[0148] First, the inventors wanted to identify a fluorescent tracer that could be used in a method of detecting and analyzing the extent and thoroughness of spray deposition. Ideally, a suitable tracer should:

[0149] a) have a high fluorescence quantum yield;

[0150] b) It can be detected under the condition that the background fluorescence interference of plants is minimal;

[0151] c) soluble in water;

[0152] d) No need to use pH buffer;

[0153] e) have sufficient photostability properties;

[0154] f) is safe and acceptable for use on food crops; and

[0155] g) cost-effective.

[0156] Initially, 140 potential compounds were identified. Considering the above factors, the initial screen left 21 possible compounds. The Excitation and Emission Spectroscopy Matrix (EEM) of the compounds in solution and solid phase was measured using CTG's Horiba Aqualog, and the solution results for four of the poten...

example 2

[0164] Example 2——improving the fluorescence properties of FMN-Na

[0165] like image 3 and 4 As shown, FMN-Na exhibits low quantum yield and very poor photostability when dry.

[0166] like Figure 5 As shown, the inventors found that the fluorescent properties of FMN-Na could be improved by combining FMN-Na with a gelling agent. Specifically, sucrose and glycerin were used because these compounds are safe and edible. Remarkably, both compounds improved the fluorescence properties of FMN-Na when used alone, but provided exceptionally significant improvements when used in combination.

example 3

[0167] Example 3——improving the stability of FMN-Na

[0168] The inventors found that FMN-Na was unstable in sunlight, and neither sucrose nor glycerol improved its stability. Therefore, the inventors tested the effects of various compounds on the photodegradation of FMN-Na, and the results were in Image 6 shown in. The two most effective compounds tested were ascorbic acid and sodium thiosulfate.

[0169] Figure 7 UV absorbance spectra of FMN-Na, ascorbic acid and sodium thiosulfate are shown. Notably, ascorbic acid closely matches the absorbance spectrum of riboflavin between 220 and 300 nm. Without wishing to be bound by theory, it is believed that by absorbing light between these wavelengths, ascorbic acid prevents photodegradation of FMN-Na. Notably, ascorbic acid is also a free radical scavenger. Therefore, this effect may also be responsible for the improved stability of FMN-Na.

[0170] To investigate this, the inventors prepared a tracer composition compris...

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Abstract

The disclosure provides a tracer composition. The composition comprises a fluorescent molecule which fluoresces when exposed to an excitation wavelength, and thereby emit a photon with a wavelength between 400 and 600 nm; and a gelling agent.

Description

technical field [0001] The present invention relates to tracer compositions, and more particularly to tracer compositions that can be used to determine spray deposition comprising the composition. The invention also extends to methods of evaluating spray deposition using tracer compositions. Background technique [0002] Sprays are often used in agriculture to treat plant and soil surfaces with pesticides, feed and other substances. Minimal deposits on the surface must be effective. Therefore, to ensure that minimal deposits have been achieved, methods have been developed to detect and analyze the extent and thoroughness of spray deposits. [0003] One way to determine coverage is to use water-sensitive paper that is distributed between crops and indicates where the spray will wet it. This method has a number of limitations. Specifically, this technique is broadly qualitative and gives little indication of the amount of spray on crop leaves. Furthermore, the paper is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07D475/14C12P25/00
CPCC09K11/06A01N25/00G01N21/6428G01N2021/6439A01N25/04C09K11/025C09K2211/1018
Inventor 杰瑞·克罗斯查尔斯·惠特菲尔德约翰·阿特里奇
Owner 切尔西科技有限公司