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Electrochemical method for detecting banned additive urotropin in food

A urotropine and electrochemical technology, applied in the direction of material electrochemical variables, measuring devices, scientific instruments, etc., can solve the problems of complicated operation and high cost, and achieve the effect of simple preparation process, stable performance and low detection cost

Inactive Publication Date: 2012-10-17
CHANGZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology uses an electrically conductive material called carbon pads or plates made from pure carboxylic acid molecules with specific chemical properties for detecting urine levels. These materials are easy-to prepare, have excellent stability during operation, and they allow quick analysis at once.

Problems solved by technology

This patents discuss different ways to determine certain substance called urethane which has potential use as an antimicrobial ingredient due its ability to prevent harmful microorganisms from growing on various materials like metal surfaces. However, current methods require complicated equipment or involve dangerous chemical reagents.

Method used

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  • Electrochemical method for detecting banned additive urotropin in food
  • Electrochemical method for detecting banned additive urotropin in food
  • Electrochemical method for detecting banned additive urotropin in food

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Follow the steps below to determine the concentration of urotropine in the sample:

[0032] (1) Preparation of working electrode

[0033] Accurately weigh graphite powder and sliced ​​paraffin with a mass ratio of 97:3 in a beaker, heat until the paraffin is completely melted, and at the same time stir continuously with a glass rod to mix the two evenly. After cooling to room temperature, fill the above mixture into the electrode , After pressing and polishing the surface of the electrode, rinse it with deionized water to get the working electrode carbon paste electrode;

[0034] (2) Drawing of standard curve

[0035] Insert the working electrode carbon paste electrode, the reference electrode saturated calomel electrode and the counter electrode platinum sheet in step (1) into a series of standard solutions of urotropine with a pH of 6 (3.0×10 -5 mol L -1 , 5.0x10 -5 mol L -1 , 1.0x10 -4 mol L -1 , 3.0x10 -4 mol L -1 , 5.0x10 -4 mol L -1 , 7.0x10 -4 mol L ...

Embodiment 2

[0043] Sample source: vermicelli sold in a supermarket

[0044] Weigh 4.0g of a commercially available vermicelli sample, crush it, put it in a 100mL beaker, add 10mL of ethanol solution, soak for 30min, ultrasonicate for 30min, then filter, take the supernatant and dilute it in a 100mL volumetric flask.

[0045] Take 2.0mL of the above-mentioned sample solution to be tested, and in a pH of 6 0.1mol L -1 In the PBS supporting electrolyte, the electrochemical test was carried out according to the method and steps of "drawing the standard curve" in Example 1, and according to the measured current value and the linear regression equation corresponding to the standard curve, the hexamethasone in the measured sample was calculated. concentration of the product. The measurement results showed that no oxidation peak current was observed near 1.47V, that is, the current value measured in the sample was approximately 0 μA, so it was judged that the sample did not contain the prohibite...

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Abstract

The invention relates to an electrochemical method for detecting banned additive urotropin in food, which comprises the following steps of: respectively and simultaneously inserting a working electrode carbon paste electrode, a reference electrode saturated calomel electrode and a counter electrode platinum sheet into 0.1mol.L-1PBS (Phosphate Buffer Solution) buffer solution to carry out differential pulse voltammetry scanning to obtain the oxidation peak current value of the urotropin, wherein the pH of the buffer solution is 6, the buffer solution contains a series of urotropin standard solution in different concentrations, and the oxidation peak current value and the concentration of the urotropin have a good linear relationship; with the same method, the oxidation peak current value of the sample solution is obtained; and according to a standard curve and a corresponding linear regression equation, the density of the urotropin in the sample is obtained. The method is simple in operation, is convenient and quick and has a low detection cost, and the urotropin can be directly detected.

Description

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Claims

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Application Information

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Owner CHANGZHOU UNIV
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