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Detecting method of food additives in mooncake

A technology for food additives and detection methods, applied in measuring devices, instruments, scientific instruments, etc., can solve the problem of not being able to measure multiple preservatives, pigments and sweeteners at the same time, shorten the measurement time, reduce sample impurities, improve The effect of peak shape

Inactive Publication Date: 2018-04-10
PUBLIC MONITORING CENT FOR AGRO PROD OF GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the national standard method cannot simultaneously determine a variety of preservatives, pigments and sweeteners, and the national standard only stipulates the determination methods in soft drinks, fruit juices, alcohol and other beverages. This method is only adjusted to neutrality with ammonia water. After filtering, it is directly used for HPLC determination, so this method is not suitable for high-protein, high-fat moon cakes, and the method of simultaneously determining multiple food additives in moon cakes has not been reported so far

Method used

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  • Detecting method of food additives in mooncake
  • Detecting method of food additives in mooncake
  • Detecting method of food additives in mooncake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of mixed standard solution:

[0040] Mix dehydroacetic acid, benzoic acid, sorbic acid and 4 kinds of p-hydroxybenzoic acid lipid standard substances in methanol, mix acesulfame potassium, sodium saccharin and 8 kinds of pigment standards in pure water, and prepare the above solutions according to Proportionally mixed to obtain a stock solution of 100 mg / L standard solution. Then use methanol-water solution with a volume ratio of 1:1 to gradually dilute and prepare to obtain mixed standard working solutions with mass concentrations of 0.1, 0.5, 1.0, 5.0, 10.0, and 20.0 mg / L, respectively.

[0041] (2) Sample extraction: The experimental material in this example is lotus seed paste moon cake. Grind the lotus seed paste moon cake and weigh 5.0g of sample into a 50.0ml centrifuge tube. , then add 1.0ml of 0.5mol / L NaOH solution, vortex on the vortex mixer for 1min, then add 1.5ml of 0.42mol / L zinc sulfate solution and mix well, then add 1.5ml of 0.5mol / L s...

Embodiment 2

[0066] The experimental material of embodiment two is fruit moon cake, all the other steps are identical with embodiment one.

[0067] The food additive sample recovery rate data of the present embodiment is shown in Table 6, and the RSD data of 17 kinds of food additive samples are shown in Table 7. Take 5 samples with commercially available fruit moon cakes, measure the peak area result and calculate the food additive content, and the test results are shown in Table 8.

[0068] Table 6 Recovery rates of 17 food additive samples in fruit moon cakes

[0069]

[0070]

[0071] Table 7 RSDs of 17 food additive samples in fruit mooncakes

[0072]

[0073]

[0074] Table 8 Residue detection results of 17 food additives in fruit mooncakes sold in the market

[0075]

[0076] The content unit of the test result is mg / kg, and ND means not detected. The detection limit of this table 8 is the same as table 5.

Embodiment 3

[0078] The experimental material of embodiment three is nut moon cake, and all the other steps are the same as embodiment one.

[0079] The food additive sample recovery data of the present embodiment is shown in Table 9, and the RSD data of 17 kinds of food additive samples are shown in Table 10. Take 5 samples with commercially available nut moon cakes, measure the peak area result and calculate the food additive content, and the detection results See Table 11.

[0080] Table 9 Recovery rates of 17 food additive samples in nut moon cakes

[0081]

[0082] Table 10 RSDs of 17 food additive samples in nut mooncakes

[0083]

[0084] Table 11 Residue detection results of 17 food additives in commercially available nut mooncakes

[0085]

[0086]

[0087] The content unit of the test result is mg / kg, and ND means not detected. The detection limit of Table 11 is the same as Table 5.

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Abstract

A method for detecting food additives in moon cakes, comprising the following steps: (1) preparing a mixed standard solution: mixing and preparing dehydroacetic acid, benzoic acid, sorbic acid, and four kinds of p-hydroxybenzoic acid lipid standard products in pure methanol; Acesulfame K, sodium saccharin, and 8 food coloring standards were mixed and prepared in pure water; then the above solutions were mixed in proportion to obtain a mixed standard stock solution; (2) sample extraction; (3) sample purification; (4) on Machine detection: the liquid to be tested and the mixed standard solution are placed in a liquid chromatograph equipped with an ultraviolet detector for detection, and the external standard method is used for quantification. Through gradient elution and wavelength switching, the content of food additives is measured simultaneously on the machine. The invention has the same pretreatment steps, low cost, high speed, reliable results and good reproducibility, and can simultaneously detect 17 kinds of food additives at one time.

Description

technical field [0001] The invention relates to the field of food detection, in particular to a method for detecting food additives in moon cakes. Background technique [0002] Moon cake is one of the famous traditional Chinese cakes, and it is a festival food custom during the Mid-Autumn Festival. The moon cakes are round and round, and the whole family eats them, which symbolizes reunion and harmony. Ancient moon cakes were eaten as sacrifices during the Mid-Autumn Festival. It is said that the custom of eating mooncakes on Mid-Autumn Festival began in the Tang Dynasty. It was popular in the court during the Northern Song Dynasty, and then spread to the people. At that time, it was commonly known as "small cakes" and "moon balls". Developed to the Ming Dynasty, it became a common food custom bought by the whole people. Moon cakes are integrated with the eating customs of various places, and moon cakes of Cantonese style, Beijing style, Suzhou style, Chaozhou style, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 邓义才骆冲丁晨红叶倩黄健祥谢书越王刚
Owner PUBLIC MONITORING CENT FOR AGRO PROD OF GUANGDONG ACADEMY OF AGRI SCI
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