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Apple powder reference substance containing pesticide residues and preparation method thereof

A technology for reference substances and pesticide residues, applied in the preparation of test samples, test food, material separation, etc., can solve problems such as the reduction of agglomeration rate, reduce the agglomeration rate, improve food safety monitoring and detection technology system, cost low effect

Pending Publication Date: 2022-01-28
SHANGHAI MUNICIPAL CENT FOR DISEASE CONTROL & PREVENTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the deficiencies of the prior art. The agglomeration rate of the apple powder reference material prepared by this technology is reduced by 11.42%. After half a year of stability testing, no sample agglomeration occurs, ensuring the accuracy of its measurement results. A kind of apple powder reference material containing pesticide residues of the present invention and its preparation method have not been reported yet

Method used

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  • Apple powder reference substance containing pesticide residues and preparation method thereof
  • Apple powder reference substance containing pesticide residues and preparation method thereof
  • Apple powder reference substance containing pesticide residues and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Method

[0043] 1. Selection of pesticide addition amount

[0044] We determine the pesticides in the apple matrix standard substance according to the limit standard of pesticide residues in apples or similar fruits stipulated in "GB2763-2019 National Food Safety Standard Maximum Residues of Pesticides in Food" and the response of pesticides on the instrument GC-MS / MS The amount of scalar added, as shown in Table 1.

[0045] Table 1 Pesticide limits and spiked quantities

[0046]

[0047] Scaling amount: based on the concentration in the final apple powder

[0048] 2 Optimization of vacuum freeze-drying parameters

[0049] We optimized the parameters of vacuum freeze-drying, as shown in Table 2.

[0050] Table 2 Apple freeze-drying parameters

[0051]

[0052] 3 Optimization of the preparation process

[0053] We chose a high molecular sugar additive: maltodextrin, and two anti-caking agents: silicon dioxide and cellulose powder to conduct experiments to ...

Embodiment 2

[0157] By adding different proportions of silicon dioxide and cellulose powder, the anti-caking effect was compared at -15°C. The results are shown in Table 12:

[0158] Table 12 Effect of addition of silicon dioxide and cellulose powder on caking of apple powder (stored at -15°C)

[0159]

[0160] Will preserve 6 months and add different proportions of silicon dioxide and cellulose powder to pass through No. CQ-17 sieve (0.408mm, 35 mesh), the result is as follows Figure 3 ~ Figure 5 show, image 3 It is the sieving diagram when the addition ratio of apple powder, silicon dioxide and cellulose powder is 100:1:0.5, Figure 4 It is the sieve diagram when the addition ratio of apple powder, silicon dioxide and cellulose powder is 100:0.5:1, Figure 5 It is the sieving diagram when the ratio of apple powder to silica and cellulose powder is 100:0.5:0.5. It can be seen from the figure that the ratio of apple powder to silica and cellulose powder is 100:1:0.5 , the best anti...

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Abstract

The invention relates to an apple powder reference substance containing pesticide residues and a preparation method of the apple powder reference substance. The apple powder reference substance containing the pesticide residues is prepared from apple pulp added with scalar pesticides, maltodextrin, silicon dioxide and cellulose powder. The method comprises the following steps of adding maltodextrin, silicon dioxide and cellulose powder into the apple pulp added with scalar pesticides, and then carrying out vacuum freeze drying, crushing and sieving, thereby obtaining the substance. The advantages of the present invention are that the raw materials and the ratio of the raw materials are optimized, the finally prepared substance not only has very high pesticide recovery rate and remarkably reduced caking rate, but also realizes good stability of the pesticide content within 60 days under the freezing condition (-15 DEG C). The substance and the method play a positive role in promoting the development of a food matrix reference substance development technology in China and perfecting a food safety monitoring and detection technology system in China.

Description

technical field [0001] The invention relates to the technical field of fruit and vegetable matrix reference materials, in particular to an apple powder reference material containing pesticide residues and a preparation method thereof. Background technique [0002] In order to control pests and diseases, pesticides are widely used in agricultural production. However, pesticide residues in food and the environment have a certain impact on human health, which has attracted people's attention. The detection of pesticide residues in food is also a key item in the field of food safety testing. There are many food inspection agencies in my country, and the inspection levels and capabilities of each agency are uneven. How to ensure the accuracy of test results provided by different laboratories, different methods, and different testers is an urgent problem to be solved in the detection of pesticide residues in food. The national standard "General Requirements for the Capability o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/02G01N30/72G01N30/06G01N30/02G01N21/41G01N1/28
CPCG01N33/025G01N21/4133G01N30/02G01N30/06G01N30/72G01N1/286G01N2001/2893
Inventor 邱歆磊卢大胜陈宇航
Owner SHANGHAI MUNICIPAL CENT FOR DISEASE CONTROL & PREVENTION
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