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Method for determining migration of organic matter in apple label based on GC-MS (Gas Chromatography-Mass Spectrometer)

A method of determination and technology of organic matter, applied in the field of analysis, can solve problems such as no method of determination of apple labels, and achieve the effect of ensuring food safety

Active Publication Date: 2013-06-12
上海辰山植物园 华东师范大学
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

There are no relevant standards for food label adhesives in China; there is also no corresponding method for the determination of organic matter migration on apple labels

Method used

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  • Method for determining migration of organic matter in apple label based on GC-MS (Gas Chromatography-Mass Spectrometer)
  • Method for determining migration of organic matter in apple label based on GC-MS (Gas Chromatography-Mass Spectrometer)
  • Method for determining migration of organic matter in apple label based on GC-MS (Gas Chromatography-Mass Spectrometer)

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Embodiment 1

[0035] The GC-MS-based method for measuring the migration of organic matter in apple labels in this embodiment is aimed at Internet rumors, using a high-precision instrument GC-MS (Agilent7890A / 5975C gas-mass spectrometer) to specifically measure the content of organic matter migration in apple labels. Among them, the working principle of Agilent7890A / 5975C GC / MS is as follows: the flow direction of gas chromatography is inert gas, and the adsorbent with large surface area and certain activity is used as stationary phase in gas-solid chromatography. When a multi-component mixed sample enters the chromatographic column, due to the different adsorption capacity of the adsorbent on each component, after a certain period of time, the running speed of each component in the chromatographic column is also different. The weakly adsorbed components are easily desorbed and leave the column first to enter the detector, while the most adsorbed components are the least desorbed and therefor...

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Abstract

The invention discloses a method for determining migration of organic matter in an apple label based on GC-MS (Gas Chromatography-Mass Spectrometer). The method comprises the following steps of: getting pulp with the thickness of 2-3cm along the outer edge of the label from a labeled apple, tearing down the label and mashing the pulp to obtain a pulp sample; getting a new similar label as a label sample; respectively adding the pulp sample and the label sample in acetone for soaking, ultrasonically extracting in water bath, centrifuging, adding diethyl ether for extraction, and standing and filtering supernatant fluid to obtain a pulp liquid and a label liquid; testing the label liquid by the GC-MS, comparing a testing result with the international mass spectrum detection line, analyzing and determining the type of the organic matter in the label and manufacturing a label control mass spectrum chart gallery; and testing the pulp liquid under the same conditions and comparing the testing result with the label control mass spectrum chart gallery, thereby obtaining the migration condition of the organic matter in the label. The method is capable of determining the migration degree of the organic matter into the pulp from the label, thereby effectively guaranteeing the edible safety of the apples and being beneficial to the establishment of the safety standard for the apple label.

Description

technical field [0001] The invention belongs to the field of analysis, in particular to a GC-MS-based method for measuring the migration of organic matter in apple labels. Background technique [0002] In December 2012, a Weibo post about "the piece under the apple label is best not to eat" attracted widespread attention. Weibo pointed out that most of the benzene, toluene, and xylene in label inks and adhesives volatilized during the 2-3 month transportation of fruits from the place of origin to consumers, and would also migrate to apples. In the skin, it destroys human tissues, organs and blood cells, and long-term consumption may cause cancer. [0003] The phenomenon of bare labels in daily life is very common. In addition to fruit labels, it is also very common for supermarkets to use plastic tape to bind vegetables. There are no relevant standards for food label adhesives in China; there is also no corresponding method for measuring the migration of organic substances...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 陆广琴肖作为郑亮高兆琪
Owner 上海辰山植物园 华东师范大学
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