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Method for detecting choline content in infant formula milk powder based on converted nano material

A technology of nanomaterials and infant formula, applied in measuring devices, analytical materials, chemical method analysis, etc., can solve the problems of low sensitivity, high instrument cost, and long detection time, and achieve high sensitivity, simple operation, and strong specificity Effect

Active Publication Date: 2019-06-04
广州市美素力营养品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of long detection time, high instrument cost and low sensitivity when measuring the content of choline in baby food, the present invention provides a method for detecting choline content in infant formula milk powder based on conversion nanomaterials

Method used

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  • Method for detecting choline content in infant formula milk powder based on converted nano material

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Embodiment 1

[0020] A method for detecting choline content in infant formula milk powder based on converting nanomaterials, characterized in that it comprises the following steps:

[0021] (1) Preparation of conversion nanomaterials: the Re 2 o 3 Dissolved in trifluoroethanol to give a concentration of 3 mM Re (CF 3 COO) 3 solution and mixed with 3 mM Na (CF 3 COO) 3 Mix equal volumes evenly, add 5 times the volume of 1:1 oleic acid-octadecene mixed solvent, degas at 85°C for 1 hour, react at 320°C, 700 rpm for 1 hour, add ethanol to precipitate the solid, and cool Collect the precipitate by filtration, wash the precipitate three times with water and ethanol respectively, and dry to obtain the conversion nanomaterial;

[0022] (2) Modification of converted nanomaterials: Dissolve polypropionic acid in a deep eutectic solvent of choline chloride-dienediethanol by heating to obtain a 3 g / mL polypropionic acid solution, and slowly pour into the solution under nitrogen protection Add 2 m...

Embodiment 2

[0026] A method for detecting choline content in infant formula milk powder based on converting nanomaterials, characterized in that it comprises the following steps:

[0027] (1) Preparation of conversion nanomaterials: the Re 2 o 3 Dissolved in trifluoroethanol to give a concentration of 4 mM Re (CF 3 COO) 3 solution and mixed with 3 mM Na (CF 3 COO) 3 Mix equal volumes evenly, add 5 times the volume of 1:1 hexadecanic acid-hexadecene mixed solvent, degas at 90 °C for 1 h, react at 300 °C, 600 rpm for 1.5 h, add ethanol to precipitate the solid, Cool and filter to collect the precipitate, wash the precipitate three times with water and ethanol respectively, and dry to obtain the conversion nanomaterial;

[0028] (2) Modification of converted nanomaterials: Dissolve polypropionic acid in a deep eutectic solvent of choline chloride-dienediethanol by heating to obtain a 0.5 g / mL polypropionic acid solution, and slowly pour into the solution under nitrogen protection Add 2...

Embodiment 3

[0032] A method for detecting choline content in infant formula milk powder based on converting nanomaterials, characterized in that it comprises the following steps:

[0033] (1) Preparation of conversion nanomaterials: the Re 2 o 3 Dissolved in trifluoroethanol to give a concentration of 4 mM Re (CF 3 COO) 3solution and mixed with 3 mM Na (CF 3 COO) 3 Mix equal volumes evenly, add 5 times the volume of 1:1 hexadecanic acid-hexadecene mixed solvent, degas at 90 °C for 1 h, react at 300 °C, 600 rpm for 1.5 h, add ethanol to precipitate the solid, Cool and filter to collect the precipitate, wash the precipitate three times with water and ethanol respectively, and dry to obtain the conversion nanomaterial;

[0034] (2) Modification of converted nanomaterials: Dissolve polypropionic acid in a deep eutectic solvent of choline chloride-dienediethanol by heating to obtain a 0.5 g / mL polypropionic acid solution, and slowly pour into the solution under nitrogen protection Add 2 ...

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Abstract

The invention belongs to the technical field of food detection, and in particular relates to a method for detecting choline content in infant formula milk powder based on a converted nano material. The method provided by the invention comprises the steps that Re2O3 is used to prepare the converted nano material; an eutecticevaporate solvent is used as a reaction solvent to modify polypropionic acid to the converted nano material; the milk powder is pretreated to acquire a milk powder sample; and finally the modified converted nano material, choline oxidase and ferrous ions are used to realizesensing detection of choline in the milk powder. The method provided by the invention has the advantages of simple and rapid operation, high specificity, high sensitivity and low detecting instrumentprice, and is suitable for detecting choline in various kinds of milk powder and powdered foods containing milk.

Description

technical field [0001] The invention belongs to the technical field of food detection, and in particular relates to a method for detecting choline content in infant formula milk powder based on conversion nanomaterials. Background technique [0002] Choline is a component of lecithin, a precursor of acetylcholine, and has an irreplaceable role in the human body. It is one of the key components of cell membranes, promotes the breakdown of fat, prevents fatty liver disease, and transmits nerve signals. Adding choline in baby food is very necessary for the brain development of babies, and the appropriate choline content can be used to evaluate the quality of infant formula milk powder. Therefore, it is very important to quantify the content of choline in baby food accurately and efficiently. [0003] At present, a variety of methods can be used for the determination of choline, including high performance liquid chromatography, electrochemical method, colorimetric method, chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N31/00
Inventor 唐玉乐
Owner 广州市美素力营养品有限公司
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