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Method for detecting choline chloride in milky products

A technology for choline chloride and dairy products, which is applied in the directions of measuring devices, instruments, scientific instruments, etc., can solve problems such as the need for improvement of choline chloride, and achieve the effects of strong accuracy, high sensitivity and high precision

Inactive Publication Date: 2017-11-21
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, current methods for the detection of choline chloride in dairy products still need to be improved

Method used

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  • Method for detecting choline chloride in milky products
  • Method for detecting choline chloride in milky products
  • Method for detecting choline chloride in milky products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, measure the choline chloride content in milk powder according to the following method:

[0026] 1. Reagents

[0027] Water: meet the first-class water requirements stipulated in GB / T 6682.

[0028] Concentrated hydrochloric acid: analytically pure, purchased from Tianjin Fuchen Chemical Reagent Factory.

[0029] Concentrated sulfuric acid: analytically pure, purchased from Tianjin Fuchen Chemical Reagent Factory.

[0030] Choline chloride (C5H14NClO): the purity is not less than 99.0%.

[0031] Hydrochloric acid solution (1mol / L): Measure 909.7g of deionized water into the eluent bottle, degas for about 5min, and slowly add 90.3mL of concentrated hydrochloric acid.

[0032] Concentrated sulfuric acid eluent solution (1mol / L): Measure 972.8mL of deionized water into the eluent bottle, degas for about 5min, and slowly add 27.20mL of concentrated sulfuric acid.

[0033] Sulfuric acid eluent (18mmol): Measure 982mL of deionized water into the eluent ...

Embodiment 2

[0062] Embodiment 2 recovery verification

[0063] Taking two samples with known choline content as the background, choline was artificially added to obtain spiked samples with levels of 200 μg / 100g, 500 μg / 100g, and 1000 μg / 100g respectively, and the samples were detected by the method of Example 1. The recovery of the method was calculated by comparing the value with the spiked amount.

[0064] The results are shown in Table 2. It can be seen from the verification results of standard addition recovery that the recovery rate of this method is distributed between 80-110%, which meets the requirements of the analytical method and can meet the detection requirements.

[0065] Table 2 Recovery Data Table

[0066]

Embodiment 3

[0067] Embodiment 3 method repeatability

[0068] Take 1 infant formula milk powder and 1 infant formula milk powder respectively, use this method to test each sample 7 times in parallel, and calculate the relative standard deviation from the test data to measure the repeatability of the method. The specific experimental data are shown in Table 3. It can be seen from the repeatability test results that the method has a relative standard deviation of less than 10% for the repeatability test of the same sample.

[0069] Table 3 Ion Chromatography Repeatability Verification Data Sheet

[0070]

[0071]

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Abstract

The invention provides a method for detecting choline chloride in milky products. The method includes steps of hydrolyzing the milky products to obtain hydrolysate; performing dilution treatment on the hydrolysate until a specific volume is achieved, and filtering the obtained solution; collecting filter fluid; performing chromatographic detection on the filter fluid. The method for detecting choline chloride in milky products has at least one of the following advantages of being strong in accuracy, high in precision, high in sensitivity and simple in operation.

Description

technical field [0001] The invention relates to the field of food. In particular, the present invention relates to methods for detecting choline chloride in dairy products. Background technique [0002] Choline chloride (choline) is a vitamin and an important nutrient needed by the human body. Choline is an anti-fatty liver factor, which can prevent fat deposition in the liver, accelerate the activity of fat entering cells, help regulate the function of liver and gallbladder, and prevent gallstones. Lack of choline can cause diseases such as heart disease, renal duct obstruction, arteriosclerosis, gastric ulcer, and gastric bleeding. Choline chloride is generally in the form of phosphorylcholine or acetylcholine and widely distributed in lecithin, egg yolk, liver, and beer wheat germ. Adults can obtain it from food, so choline deficiency has not been found in adults. For infants and young children who rely entirely on infant formula milk powder for nutrition, choline chl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 刘美霞王佳马文丽常建军宋晓东
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD