A method for degrading patulin in fruit juice

A technology of patulin and fruit juice, which is applied in the field of liquid food detoxification treatment, can solve problems such as unsatisfactory effects, achieve the effects of shortening the processing time, improving quality and reducing enzyme activity

Active Publication Date: 2019-05-03
HUAZHONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of the existing ultraviolet treatment technology on degrading PAT is not very satisfactory. In addition, in the production process of apple juice, the degree of browning of juice is a major factor that reduces the quality of apple juice, and ultraviolet treatment cannot effectively curb this disadvantage. Variety

Method used

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  • A method for degrading patulin in fruit juice
  • A method for degrading patulin in fruit juice
  • A method for degrading patulin in fruit juice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: TiO 2 Effect of photocatalysis on the quality of simulated fruit juice

[0032] 1. Processing method

[0033] (1) The fruit juice is placed in the reaction device, and the experiment adopts figure 1 installation;

[0034] (2) Add nano-TiO to the reaction device 2 Powder, get TiO 2 mixed suspension with fruit juice;

[0035] (3) Control the temperature of the mixed suspension, directly irradiate with ultraviolet light, and keep stirring during the irradiation process;

[0036] (4) Filter the mixed suspension through photocatalytic degradation to remove powder TiO 2 .

[0037] The solution volume of each experiment was kept constant at 250mL, the initial patulin content was 500μg / kg, and the entire achievable irradiation length of the ultraviolet light source was 17.5cm. In this experiment, the maximum effective irradiation length was 8cm, and the ultraviolet power was 28w. The diameter of the quartz tube of the overcoat is 3cm, and the container for ho...

Embodiment 2

[0059] Example 2: TiO 2 Effect of photocatalysis on the quality of real fruit juice

[0060] 1. Preparation of experimental raw materials and fruit juice

[0061] Red Fuji apples (produced in Baishui County, Shaanxi, China) were purchased from Jingdong Supermarket. They were uniform in size, ruddy in color, complete, free of pests and diseases, and free of mechanical damage; they were immediately shipped back to the laboratory.

[0062] Take a good apple, clean it, remove the core, cut into pieces, blanching part of it to protect the color, and part of it after squeezing the juice, add L-ascorbic acid in proportion (0.5g / kg) to protect the color (within the range allowed by the national standard), Freeze at -20°C for further processing.

[0063] 2. TiO2 2 Effect of photocatalysis on the quality of real fruit juice

[0064] 2.1 Recovery of standard addition

[0065] Measure 5mL of the sample into a 50mL centrifuge tube, add 10mL of ethyl acetate, ultrasonically extract for...

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Abstract

A method for degrading patulin in fruit juice is provided. The method includes (1) adding fruit juice into a reactor; (2) adding nanometer TiO2 powder into the reactor to obtain a mixed suspension, with the TiO2 concentration being controlled to be 0.9-1.5 g / kg; (3) controlling the temperature of the mixed suspension to 20-30 DEG C, and directly radiating the suspension with ultraviolet light for40-120 min under stirring; and (4) subjecting the mixed suspension after photocatalytic degradation to filtration with a filter to remove TiO2. The TiO2 which is a nontoxic harmless trace component isintroduced, and physical properties thereof excited by ultraviolet and an ultraviolet processing technique are utilized in combination, thus greatly improving advantages of ultraviolet processing, benefiting sense perception of the fruit juice and greatly improving product quality.

Description

technical field [0001] The invention relates to the technical field of liquid food detoxification treatment, in particular to a method for photocatalytically degrading patulin in fruit juice. Background technique [0002] Patulin (PAT), also known as patulin, is a toxic fungal metabolite. According to the research, the fungi that can produce patulin include Penicillium expanses, Penicillium patulin, Penicillium clavum, Penicillium soil, Penicillium new Zealand, Penicillium lithoid, Penicillium granulosa, Penicillium merlin, Penicillium arcus, There are 16 species belonging to 3 genera including Penicillium chrysogenum, Penicillium betelifera, Aspergillus clavatus, Aspergillus gigantum, Aspergillus terreus and Epidermis indica. Patulin mainly contaminates fruits and their products, especially apples, hawthorns, pears, tomatoes, apple juice and hawthorn slices. Toxicological tests have shown that patulin has toxic effects such as affecting fertility, carcinogenesis and immun...

Claims

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Application Information

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IPC IPC(8): A23L2/70A23L2/72
Inventor 彭帮柱李围围潘思轶
Owner HUAZHONG AGRICULTURAL UNIVERSITY
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