Resonance light scattering method for determining organophosphorus pesticide in camellia oleosa seed oil
An organophosphorus pesticide and resonance light scattering technology, which is applied in the measurement of scattering characteristics and the preparation of test samples, can solve the problems of low recovery rate, poor effect, and relative standard deviation of Camellia oleifera seed oil samples
Pending Publication Date: 2022-05-31
衡阳市市场监督检验检测中心
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[0004] The existing resonance light scattering method for the determination of organophosphorus pesticides in camellia oleifera seed oil is not effective, the detection recovery rate of camellia oleifera seed oil samples is not high, and the relative standard deviation is urgently needed. Scattering method to solve the above-mentioned problems
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[0023] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0024] see Figure 1-Figure 5 , the present invention provides a technical solution: a resonance light scattering method for measuring organophosphorus pesticides in Camellia oleifera seed oil, comprising instruments and reagents, the instruments including a fluorescence spectrometer, an elemental analyzer, a Fourier transform infrared spectrometer and a proton nuclear magnetic resonance spectrometer instrument, reagents include o-phenylenediamine, 5-nitrosalicylaldehyde, ferric nitrate nonahydrate, absolute ethanol, monocrotophos, trishydroxymethylaminomethane, hydrochloric acid, acetonitrile, acetic acid, anhydrous magnesium sulfate, anhydrous Sodium acetate, ethyl acetate, PSA, C18, secondary pure water and ceramic homogeneous.
[0025] Fluore...
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The invention provides a resonance light scattering method for determining organophosphorus pesticides in camellia oleosa seed oil, which is characterized in that monocrotophos is used as an organophosphorus pesticide model, and 5-nitrosalicylaldehyde, o-phenylenediamine and iron nitrate nonahydrate are used as substrates to synthesize a tetradentate Schiff base-iron (III) metal complex B with double acceptor properties. Central ion iron (III) of the complex B can recognize phosphate groups in organophosphorus pesticide molecules to be coordinated with the organophosphorus pesticide molecules; nitro (-NO2) on the ligand of the complex B can recognize amino (-NH2) of moncrotophos and is combined with the amino (-NH2) through a hydrogen bond, so that a double-receptor sandwich complex is formed and subjected to aggregation reaction to enable a system to generate a strong resonance light scattering signal at 300 nm, when the concentration of moncrotophos is 0-1.1 mu M, the resonance light scattering intensity of the system is linearly related to the concentration of moncrotophos, and when the concentration of moncrotophos is 0-1.1 mu M, the resonance light scattering intensity of the system is higher than the resonance light scattering intensity of the system. The linear equation is I = 1375.9 c (mu M) + 527.71. The method is applied to detection of actual camellia oleosa seed oil samples, the recovery rate is in the range of 97.0%-103.0%, and the relative standard deviation is in the range of 1.5%-3.8%.
Description
technical field [0001] The invention relates to a resonance light scattering method for measuring organophosphorus pesticides in camellia oleifera seed oil, and belongs to the technical field of camellia oleifera detection. Background technique [0002] In modern agriculture, in order to ensure the yield of crops and improve the quality of agricultural products, pesticides are widely used. However, the negative effects brought by the widespread use of pesticides have also been closely watched by people. Pesticide residues in crops and the environment have always been one of the hot issues in contemporary agricultural production and food safety. According to research reports, there are about 3 million cases of pesticide poisoning in the world every year, of which 220,000 die. Among the many categories of pesticides, organophosphorus pesticides have been widely promoted because of their advantages such as good insect removal effect, low cost, and low persistence. For example...
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Login to View More IPC IPC(8): G01N21/51G01N1/38G01N1/34
CPCG01N21/51G01N1/38G01N1/34
Inventor 杨静肖锡林李明德李倩
Owner 衡阳市市场监督检验检测中心