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Matrix solid-phase dispersing agent of graphene oxide mixed material and application of matrix solid-phase dispersing agent

A technology of mixing materials and matrix solid phase, applied in the field of chemistry, it can solve the problems of large influence of sample matrix effect, poor generality of extraction method, obvious sample matrix effect, etc., to achieve excellent adsorption and elution ability, and avoid large losses. , to ensure the effect of extraction and purification effects

Inactive Publication Date: 2014-10-08
JIANGSU SUPERVISION & INSPECTION INST FOR PROD QUALITY
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  • Application Information

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Problems solved by technology

Therefore, using this liquid-liquid extraction method without purification and directly injecting samples, the sample matrix effect is obvious, which may easily lead to low recovery and false negative results.
[0004] It can be seen that although there are many extraction methods for mycotoxins at present, the extraction methods are not universal, the matrix effect of the sample is greatly affected, the result recovery rate is low, and there are false negative problems. The MSPD using nanomaterials as adsorbents The technology helps to significantly improve the extraction efficiency of samples, and is very suitable for the rapid detection and confirmation of mycotoxins in solid wheat flour

Method used

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  • Matrix solid-phase dispersing agent of graphene oxide mixed material and application of matrix solid-phase dispersing agent
  • Matrix solid-phase dispersing agent of graphene oxide mixed material and application of matrix solid-phase dispersing agent
  • Matrix solid-phase dispersing agent of graphene oxide mixed material and application of matrix solid-phase dispersing agent

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Effect test

Embodiment 1

[0027] Accurately weigh 0.5g of wheat flour, 0.1g of graphene oxide powder (purchased from TNGO of Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) and 2g of florisil (purchased from Shanghai Boshi Biotechnology Co., Ltd., and store them at 650°C before use. Heated at high temperature for 3h to activate treatment) in a 150mL Erlenmeyer flask. Mix the mixture with a vortex mixer for 3-5 minutes to make it fully mixed. Transfer to a mortar and grind for 5 minutes to fully extract.

[0028] Place a frit on the bottom of the 5ml glass syringe, transfer the mixture into the syringe, place another frit on top, and compact.

[0029] First rinse with 5ml of methanol solution (control the flow rate at about 1ml / min), discard the eluent, then use 5ml of acidic methanol (containing 2% concentrated hydrochloric acid) solution to elute the target analyte, collect the eluate and spin in the evaporating flask.

[0030] Nitrogen was blown to near dryness at 40°C.

[0031]...

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Abstract

The invention relates to a matrix solid-phase dispersing agent and application thereof and in particular relates to a solid-phase dispersing agent taking a graphene oxide mixed material as a matrix and an application of the solid-phase dispersing agent, belonging to the technical field of chemistry. A mixed material of graphene oxide and Cleanert Florisil is utilized as a matrix solid-phase dispersing agent, and 18 fungal toxins in a wheat meal sample are measured through a positive ion mode MRM detection mode of high performance liquid chromatography-mass spectrometry / mass spectrometry (HPLC-MS / MS). The matrix solid-phase dispersing agent has the advantages that the recovery rate of a fungal toxin detection method is improved, and the universality of the method is enhanced, so that the detection requirement can be met through a mass spectrum without a positive and negative ion switching mode, and the sensitivity and detection limit can meet the requirements of various standards.

Description

technical field [0001] The invention relates to a matrix solid-phase dispersant and its application, in particular to a matrix solid-phase dispersant using a graphene oxide mixed material and its application, and belongs to the field of chemical technology. Background technique [0002] Mycotoxins are secondary toxic metabolites produced by fungi during their growth and reproduction. Common mycotoxins are: aflatoxins (AFs), ochratoxins (OTs), fumonisins (FBs) and deoxynivalenol (DON) and other toxins. Mycotoxins widely contaminate plant-derived foods such as crops, food, and feed. Studies have confirmed that some mycotoxins can cause acute or chronic poisoning in humans and animals, and damage the body's liver, kidney, nerve tissue, hematopoietic tissue, and skin tissue. Therefore, domestic There are strict limits on mycotoxins. [0003] Due to the low content of mycotoxins in food and the complex sample matrix, the separation and enrichment method of target analytes has b...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/06
Inventor 王峰张征张红娟仓义鹏
Owner JIANGSU SUPERVISION & INSPECTION INST FOR PROD QUALITY
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