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Electrochemical method for detecting sunset yellow in food

A sunset yellow and electrochemical technology, applied in the direction of material electrochemical variables, can solve the problems of complicated sunset yellow detection and low sensitivity, and achieve the effects of simple operation, simple electrode preparation and high sensitivity

Active Publication Date: 2017-05-10
AGRI PROD QUALITY SAFETY & DETECTION TECH RES INST GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRI SCI
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an electrochemical method for detecting sunset yellow in food, so as to overcome the shortcomings of complicated detection of sunset yellow and low sensitivity

Method used

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  • Electrochemical method for detecting sunset yellow in food
  • Electrochemical method for detecting sunset yellow in food
  • Electrochemical method for detecting sunset yellow in food

Examples

Experimental program
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Effect test

preparation example Construction

[0034] (2) Preparation of carbon paste electrode: Grind carbon powder and paraffin oil in a ratio of 5:1 (mass ratio) to form a uniform paste, then press the paste into the carbon paste electrode tube shell connected with copper wire, Grind and polish on clean weighing paper to obtain a carbon paste electrode.

[0035] (3) Preparation of ZnO nanoflower modified carbon paste electrode: Add 10 mg of ZnO nanoflower into 5 mL of absolute ethanol, sonicate until a stable suspension is obtained, and drop 5 μL of the above suspension on the carbon paste electrode surface, after drying, ZnO nanoflower-modified carbon paste electrodes were obtained.

[0036] (4) Preparation of standard solution: Accurately weigh a certain amount of sunset yellow solid, dissolve it with twice distilled water, dilute, and constant volume to prepare a mother solution with a concentration of 5.0 mg / mL. Take a certain amount of mother liquor and add it to 1 / 15mol / L pH=5.0 phosphate buffer solution, and con...

Embodiment 1

[0040] Detection of commercial fruit juice drinks

[0041] (1) Take 100mL of commercially available juice drink and ultrasonicate for 30min to remove CO 2 , Take 10 μL of the above-mentioned sample to be tested and add it to 10 mL of 1 / 15mol / L phosphate buffer;

[0042](2) Insert the three-electrode system (the carbon paste electrode modified by zinc oxide nanoflowers as the working electrode; the saturated calomel electrode as the reference electrode; the platinum wire electrode as the counter electrode) into the phosphate buffer solution containing the sample to be tested, and stir After 360s of lower enrichment, an electrochemical test is carried out, and the corresponding sunset yellow concentration value is calculated from the standard curve according to the measured current value;

[0043] (3) In the sample solution to be tested, add a certain amount of sunset yellow standard solution respectively, so that the concentration of sunset yellow added in the sample is 20; 30...

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Abstract

The invention discloses an electrochemical method for detecting sunset yellow in food. The method includes the steps: (1) synthesizing zinc oxide nano-flowers; (2) preparing carbon paste electrodes; (3) modifying the carbon paste electrodes with the zinc oxide nano-flowers; (4) preparing standard solution; (5) drawing a standard curve; (6) conventionally pre-treating samples needing to be detected when actual detection is achieved, measuring oxidation peak current values corresponding to the samples of sunset yellow according to experimental conditions, calculating according to a linear regression equation of the step (5) to obtain the content of the sunset yellow in the samples to be detected. The electrochemical method for detecting the sunset yellow in the foods is simple and convenient to operate, low in cost and high in sensitivity, and the electrodes are simple to prepare.

Description

technical field [0001] The invention relates to the field of food detection, in particular to an electrochemical method for detecting sunset yellow in food. Background technique [0002] Sunset yellow is a synthetic pigment and is one of the approved food additives in my country. Because of its ability to improve the appearance of food and low cost, it is widely used in the production and processing of food. However, excessive consumption of sunset yellow can cause allergies, diarrhea, migraine, bronchial asthma and other symptoms, and also cause certain damage to the kidneys, liver and nervous system. Therefore, it is of great practical significance to establish a simple, accurate and sensitive measurement of sunset yellow content in food. [0003] At present, the detection methods of sunset yellow mainly include liquid chromatography, ultraviolet spectrophotometry, fluorescence spectroscopy and electrochemical method. Liquid chromatography is currently the most commonly...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30
CPCG01N27/26G01N27/30
Inventor 牙禹谢丽萍蒋翠文李焘闫飞燕莫磊兴廖洁范业赓韦宇宁
Owner AGRI PROD QUALITY SAFETY & DETECTION TECH RES INST GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRI SCI
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