Method for measuring migration quantity of benzene series in food processing electric appliance on basis of dynamic headspace

A technology of dynamic headspace and food processing, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., to achieve the effect of high sensitivity and simple operation

Inactive Publication Date: 2017-12-26
CHINESE ACAD OF INSPECTION & QUARANTINE
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  • Application Information

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Problems solved by technology

However, there are few reports on the migration of chemical substa...

Method used

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  • Method for measuring migration quantity of benzene series in food processing electric appliance on basis of dynamic headspace
  • Method for measuring migration quantity of benzene series in food processing electric appliance on basis of dynamic headspace
  • Method for measuring migration quantity of benzene series in food processing electric appliance on basis of dynamic headspace

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Embodiment Construction

[0024] 1. Instruments and reagents

[0025] Agilent 6890-5975 Gas Chromatograph-Mass Spectrometer (Agilent, USA), Dynamic Headspace Instrument (DANI, Italy).

[0026] Benzene, p-xylene (Beijing Bailingwei Technology Co., Ltd., purity ≥ 99.0%), ethylbenzene, m-xylene, o-xylene, styrene (Shanghai Macklin Biochemical Technology Co., Ltd., purity ≥ 99%), toluene (Korea Duksan purechemicals, purity ≥ 99.9%), sodium chloride (Xilong Chemical, analytically pure), absolute ethanol (Beijing Chemical Plant, analytically pure), and experimental water was ultrapure water prepared by Milli-Q.

[0027] 2. Solution preparation

[0028] Standard solution: Weigh 20 mg of each standard product, dissolve it in ethanol and dilute it in a 100 mL volumetric flask to prepare a 200 mg / L single-standard stock solution; accurately draw 1 mL of each single-standard stock solution, and dilute it in a 100 mL volumetric flask with ethanol , prepared into 2mg / L mixed standard stock solution. Then diluted...

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Abstract

The invention discloses a method for measuring the migration quantity of benzene series in a food processing electric appliance on the basis of a dynamic headspace-gas chromatgraphy mass spectrometrometry technology. The method comprises the following steps that food simulation liquid is subjected to migration when a stirring machine is in a normal work state; migration liquid is obtained; the migration liquid is subjected to dynamic headspace purge and trap sampling; the gas chromatography-mass spectrometrometry detection is used; an external standard method is used for quantification. The method for measuring the migration quantity of the benzene series in the food processing electric appliance on the basis of dynamic headspace has the advantages that the operation is simple; the speed is high; the environment is protected; the sensitivity is high; the method can be used for the migration quantity detection of the benzene series in a domestic blender.

Description

technical field [0001] The invention relates to a method for detecting chemical substances, in particular to a method for measuring the migration of benzene series in food processing appliances based on dynamic headspace. Background technique [0002] Household food processing appliances are becoming more and more popular, such as household blenders with functions such as juicing and grinding. Their safety, especially chemical safety, is closely related to the health of consumers. Except for the rotating blade, most of the other parts of the mixer are made of plastic and rubber. Some mixers use unqualified wires, bearings, motors and other parts need to use lubricating oil, which may contain benzene residues. When it comes into contact with food, it may be Migrate into food and endanger human health. All countries in the world have strict regulations on benzene series in food contact materials. For example, my country's "Food Plastic Packaging, Containers, Tools and Other P...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 吕庆王志娟张庆李海玉白桦
Owner CHINESE ACAD OF INSPECTION & QUARANTINE
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