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Method for rapidly detecting acrylic amide

An acrylamide, fast technology, applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve the problems of inability to detect low-concentration samples, expensive equipment, complicated and tedious preprocessing, etc., and achieve a wide range of application prospects , The method is simple and easy to operate

Inactive Publication Date: 2014-10-29
SHANGHAI OCEAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for rapid detection of acrylamide, so as to overcome the complicated and cumbersome pretreatment, time-consuming and labor-intensive operation, expensive equipment, large one-time investment, and high minimum detection limit in the existing detection methods. Concentration samples and other shortcomings and deficiencies, based on dielectric properties to detect acrylamide

Method used

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  • Method for rapidly detecting acrylic amide
  • Method for rapidly detecting acrylic amide
  • Method for rapidly detecting acrylic amide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Most of the ingredients have polarized properties, select 3×10 8 ~10 10 Hz (0.3 ~ 10GHz) frequency area. Use the coaxial probe method to measure the dielectric property value of the filtrate, measure 3×10 8 ~10 10 Permittivity and dielectric loss rate at Hz frequency.

[0022] Prepare different concentrations of acrylamide solutions (0.1-10 μg / ml) with acrylamide standard products, and measure the dielectric characteristic value of the above-mentioned acrylamide solution with the coaxial probe method, and measure 3×10 8 ~10 10 Permittivity and dielectric loss rate at Hz frequency. Concentration range of acrylamide solution: 0.1, 0.2, 0.3, 0.4, 0.7, 1, 4, 7, 10μg / ml; frequency range: 3×10 8 ~10 10 Hz, a value is measured every 5MHz.

[0023] Depend on figure 1 It can be seen that with the increase of the frequency, the dielectric loss rate of the acrylamide standard solution shows an upward trend, and with the increase of the concentration of the acrylamide stan...

Embodiment 2

[0028] Sample preparation: Commercially available refined starch was mixed with deionized water at a mass ratio of 100:40 to make dough, which was rested at room temperature for 12 hours. The dough is made into a rectangular parallelepiped sample whose length, width and height are 50×50×2 mm respectively. The quality of the sample is controlled at 5 g. The sample is placed in a fresh-keeping bag to prevent water evaporation and is set aside.

[0029] Extraction of acrylamide in fried and fried foods: Place the samples in electric heating fryers respectively, set the temperature at 175°C, and control the temperature with thermocouples. The frying time is 10, 20, 30, 45, 60 and 90s respectively. After frying, filter the oil on a mesh tray for 30 minutes. Crush the sample, take 5g of the sample in a conical flask, add 100ml of deionized water, stir and mix, and shake for 4h. The mixture was filtered, and the supernatant was taken, placed in a small glass bottle, and kept for fu...

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Abstract

The invention discloses a method for rapidly detecting acrylic amide. The method for rapidly detecting the acrylic amide includes following steps: smashing a sample to be detected and placing the smashed sample in deionization water, stirring the deionization water for 1-4 hours in backflow mode, filtering the deionization water so as to obtain a filter solution; measuring dielectric loss rate of the filter solution under a frequency condition of 3*108-1010Hz; using a standard curve or a dependent equation of the dielectric loss rate of a standard acrylic amide solution under the same frequency so as to obtain concentration of the acrylic amide in the filter solution and calculate content of the acrylic amide in the sample. The method for rapidly detecting the acrylic amide is short in time, and simple and easy to operate, obtains better detection effects for detecting the content of the low concentration acrylic amide than detection effects obtained by using a liquid chromatogram detection method, and has a wide application prospect in the aspect of detecting the content of the acrylic amide in fried food.

Description

technical field [0001] The invention relates to a method for rapidly detecting acrylamide, in particular to a method for rapidly detecting acrylamide in food, specifically a method for rapidly detecting acrylamide content based on dielectric properties. Background technique [0002] Deep frying is one of the most time-honored and popular cooking methods in existence, which imparts unique texture and good flavor to food. However, some substances harmful to human health, such as acrylamide, will also be produced when food is fried at high temperature. In February 2004, researchers from the Swedish National Food Administration and Stockholm University stated that a chemical substance, acrylamide, was found in various fried and baked foods. Acrylamide is a white crystalline powder, mainly found in some foods that have been cooked at high temperatures and rich in carbohydrates. The foods with the highest content include some fried foods such as potato chips and French fries, and...

Claims

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Application Information

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IPC IPC(8): G01R27/26G01N27/00
Inventor 金银哲陆建锋程裕东
Owner SHANGHAI OCEAN UNIV
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