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Method for detecting artificially synthesized edible pigments

A technology for artificially synthesizing pigments and synthetic pigments, which is applied in the measurement of color/spectral characteristics, etc., which can solve the problems of high cost, testing in a laboratory, and long testing time, and achieves low cost, improved supervision efficiency, and easy operation Effect

Inactive Publication Date: 2014-12-10
BEIJING ZHIYUNDA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional pigment detection needs to be carried out in the laboratory, which is expensive and takes a long time. It can no longer meet the needs of today's society for food safety. Research and develop a set of detection instruments that are easy to operate, low in cost, fast and accurate, and suitable for on-site qualitative analysis. And methods, can provide effective detection means for timely control of illegally added synthetic coloring food into the market, and improve supervision efficiency, which is an urgent problem that needs to be solved in today's daily health supervision and law enforcement work

Method used

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  • Method for detecting artificially synthesized edible pigments
  • Method for detecting artificially synthesized edible pigments
  • Method for detecting artificially synthesized edible pigments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 detects the step of the synthetic pigment in wolfberry

[0045] (1) Extraction of synthetic pigments: Take 6 grams of a commercially available wolfberry sample, wash the sample repeatedly with 60ml of distilled water until the extract is colorless, combine the washing solution into a 100ml beaker; centrifuge at 8000r / min for 10 minutes, and take the supernatant The pH of the solution was adjusted to 4 with tartaric acid;

[0046] (2) Separation of synthetic pigments:

[0047] a. Activation of the macroporous adsorption resin: put an appropriate amount of macroporous adsorption resin into a conical flask, add absolute ethanol and fully soak it. Then wash it with distilled water several times until there is no ethanol smell, and drain the water for later use;

[0048] b. Pigment adsorption: Weigh an appropriate amount of pretreated NKA-9 macroporous resin 1.5g and add it to a 100ml conical flask, add the treated pigment extract, add 1g of ammonium chloride ...

Embodiment 2

[0051] Example 2 Repeatability experiment of pigment detection method.

[0052] Weigh 0.1 g of amaranth standard substance and dissolve it in a 100ml volumetric flask to prepare a 1 μg / μl standard solution. Take 6 grams of a commercially available wolfberry sample, wash the sample repeatedly with 60ml of distilled water, combine the washing liquid into a 100ml beaker, add 60ul of a 1μg / μl standard solution, and stir evenly. Centrifuge at 8000r / min for 10 minutes, take the supernatant and adjust the pH to 4 with tartaric acid. Weigh the treated NKA-9 macroporous resin and carry out adsorption and desorption according to the steps in Example 1, and measure after making the sample liquid to be tested. Repeat the above steps 6 times, it can be seen from the obtained experimental data that RSD<5%, indicating that the method has good repeatability.

[0053] Table 1 The repeatability experimental data of amaranth detection

[0054]

[0055]

Embodiment 3

[0056] Example 3 Pigment detection method precision and accuracy experiments.

[0057] Weigh 0.1 g of amaranth and carmine standard substances and dissolve them in a 100ml volumetric flask to prepare a 1 μg / μl standard solution. The operation was carried out according to the steps of Example 2, and the volume of the standard solution added was changed to 300 μl, and the rest of the steps were the same as in Example 2, and repeated 6 times.

[0058] Table 2 The recovery data of amaranth and carmine

[0059]

[0060] It can be seen from Table 2 that the recovery error of amaranth and carmine is within 5%, indicating that this method has good accuracy and precision, and can fully meet the needs of quantitative analysis and determination of synthetic pigments.

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Abstract

The invention provides a method for detecting artificially synthesized edible pigments. Multiple artificially synthesized edible pigments are simultaneously detected once by using a spectrophotometric method, whether eight artificially synthesized edible pigments of carmine, amaranth, tartrazine, sunset yellow, brilliant blue, indigo blue, erythrosine and new red are illegally and excessively added in foods can be detected, and an effective detection means is provided for controlling flowing of foods, to which the artificially synthesized edible pigments are illegally added, into the market. The method comprises the following steps: (1) extracting synthesized pigments; (2) separating the synthesized pigments; and (3) detecting the pigments.

Description

technical field [0001] The invention relates to a method for detecting edible artificial pigments. Background technique [0002] Food coloring is divided into two kinds of natural coloring and synthetic coloring. Natural pigments are mainly extracted from plant tissues, and also include some pigments from animals and microorganisms. Synthetic pigments refer to organic pigments produced by artificial chemical synthesis methods. Among the foods with added pigments, less than 20% use natural pigments. The rest are synthetic colors. In the process of food processing, the cost of adding natural pigments is high, and the dyed colors are not bright enough, and their chemical properties are unstable and easy to fade. In contrast, synthetic pigments are bright in color, have good tinting strength, and are cheap, so synthetic pigments are widely used in food. [0003] In recent years, with the rapid development of the food industry, the demand for food coloring has increased shar...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 张敬晗谢艳红叶升锋邱岩岩桑华春
Owner BEIJING ZHIYUNDA TECH CO LTD
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