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A rapid detection method for plasticizers in food based on in-situ spraying method

A detection method and plasticizer technology, applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of no plasticizer content standard, inability to distinguish, etc.

Active Publication Date: 2015-10-21
WUXI X RES PROD DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] First of all, it is not that the presence of plasticizers in food is unqualified. The content of plasticizers should have a threshold, and the content of plasticizers below the threshold is acceptable. Therefore, this detection method cannot distinguish which foods contain plasticizers. qualified;
[0006] Secondly, the invention has no specific standards for the content of plasticizers in food, such as children's standards, adult standards, etc.

Method used

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  • A rapid detection method for plasticizers in food based on in-situ spraying method

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Experimental program
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specific Embodiment 1

[0035] A rapid detection method for whether plasticizers in food exceed the standard based on in-situ spraying method, the flow chart is as follows figure 1 shown. The method includes the following steps:

[0036] a. Establish critical plasticizer inspection standards

[0037] Select solute: plasticizer;

[0038] Equipped with solvent: weigh 1g of hydroxylammonium hydrochloride, 8mg of sodium metavanadate, 0.16g of nickel nitrate hexahydrate, 20ml of 50% acetic acid, stir and mix evenly;

[0039] The mass ratio of solute and solvent is mixed according to the critical standard of plasticizer content;

[0040] Spread the mixed solution evenly on the cover glass, bake it with a baking lamp at 100°C for 10 minutes, and irradiate it with an ultraviolet lamp with a wavelength of 340nm to obtain blue fluorescence. The gray value of the fluorescence is used as the inspection standard; A blue color guide of the same color as the fluorescent color is used as standard.

[0041] This...

specific Embodiment 2

[0048] The difference between this embodiment and the specific embodiment 1 is that the grayscale value of the fluorescence is used as the inspection standard; specifically, the grayscale or RGB value of the fluorescence is obtained as a standard by using a machine vision method.

[0049] This machine vision method is convenient for automatic and rapid judgment, and can effectively avoid detection errors caused by subjective judgments and improve detection reliability.

specific Embodiment 3

[0050] The difference between this embodiment and specific embodiment 1 is that after step a is executed, the critical plasticizer inspection standard has been established, therefore, step a does not need to be repeated for each inspection, therefore, the steps of the method are as follows:

[0051] Spread the same reaction solution as the solvent used in step a evenly on the cover glass, bake at 100°C for 10 minutes with a baking lamp, and irradiate with a UV lamp with a wavelength of 340nm, if:

[0052] If no blue fluorescence is obtained, there is no plasticizer;

[0053] Obtain blue fluorescence, but lighter than the color of step a, then the plasticizer content does not exceed the standard;

[0054] Obtain blue fluorescence, but darker than the color of step a, then the content of plasticizer exceeds the standard.

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Abstract

The invention discloses an in-situ-spraying-method-based method for rapidly detecting whether a plasticizing agent in a food exceeds a standard, belongs to the field of food safety detection and in particular relates to a method for rapidly detecting the content of a plasticizing agent in the food. The method comprises the following steps: establishing a critical plasticizing agent inspection standard; detecting whether the content of the plasticizing agent exceeds the standard. Because the critical plasticizing agent content standard is taken as a detection reference, and intensity information whether generates blue fluorescence and fluorescence is matched, the method can be used for identifying whether the plasticizing agent is contained in the food and can judge whether the content of the plasticizing agent exceeds the standard. Moreover, because the critical standard can be selected from a child standard, an adult standard, a livestock standard and the like, by using the method, different content standards can be met.

Description

technical field [0001] The invention relates to a rapid detection method for whether a plasticizer in food exceeds the standard based on an in-situ spraying method, which belongs to the field of food safety detection, and specifically relates to a rapid detection method for the content of plasticizer in food. Background technique [0002] At the end of May 2011, the "plasticizer incident" in Taiwan spread to mainland China, as well as the United States, Canada, the Philippines and other countries, and has become an international food safety incident. The Chinese Ministry of Health urgently issued an announcement on June 1, including plasticizer phthalates in the list of non-edible substances that may be illegally added to food and food additives that are easily abused. [0003] Clouding agent is a regular food additive, and plasticizers with the same effect but lower cost are illegal additives. Many unscrupulous traders replace clouding agent with plasticizers in order to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 赵春城赵烟桥
Owner WUXI X RES PROD DESIGN & RES