Method for detecting rongalit in food by gas chromatograph mass spectrometer

A combined instrument and hanging white block technology, applied in the field of detection, can solve the problems of trace extraction errors and long processing time, and achieve the effects of reducing the use of solvents, shortening the experimental time, and high detection sensitivity.

Inactive Publication Date: 2015-07-29
WUZHOU INST FOR FOOD & DRUG CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] GB / T 21126-2007 and DB34 / T 1108-2009 record the method of liquid chromatographic detection of hanging white lumps in food, but the extraction method is used for sample pretreatment, but the method takes a long time to process, and for trace substances There is an error in the extraction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Add 1g of food sample into the headspace vial, add 2ml of 0.05mol / L EDTA solution, 2ml of 0.05mol / L sodium acetate solution, stir evenly and compact it on the machine for testing;

[0020] Step 2: adopt gas phase-mass spectrometry to measure the content of formaldehyde sodium sulfoxylate in the headspace vial, wherein, the parameter setting of gas phase-mass spectrometry is as follows:

[0021] Chromatographic column: Phenomenex 60m×0.50mm, 3.2μm;

[0022] The column temperature program of the chromatographic column: the initial temperature is 40°C, keep for 5min, then rise to 110°C at 10°C / min, and keep for 5min;

[0023] Inlet temperature: 300°C; Interface temperature: 280°C; Quadrupole temperature: 150°C; Ion source temperature: 230°C;

[0024] Carrier gas: helium with purity ≥99.999%, constant flow mode, flow rate 0.4mL / min;

[0025] Ionization method: EI; ionization energy: 70ev;

[0026] Monitoring mode: full scan / selected ion monitoring simultaneous ac...

Embodiment 2

[0030] Step 1: Add 1g of food sample into the headspace vial, add 1ml of 0.05mol / L EDTA solution, 3ml of 0.05mol / L sodium acetate solution, stir evenly and compact it on the machine for testing;

[0031] Step 2: adopt gas phase-mass spectrometry to measure the content of formaldehyde sodium sulfoxylate in the headspace vial, wherein, the parameter setting of gas phase-mass spectrometry is as follows:

[0032] Chromatographic column: Phenomenex 60m×0.50mm, 3.2μm;

[0033] The column temperature program of the chromatographic column: the initial temperature is 40°C, keep for 5min, then rise to 110°C at 10°C / min, and keep for 5min;

[0034] Inlet temperature: 300°C; Interface temperature: 280°C; Quadrupole temperature: 150°C; Ion source temperature: 230°C;

[0035] Carrier gas: helium with purity ≥99.999%, constant flow mode, flow rate 0.4mL / min;

[0036] Ionization method: EI; ionization energy: 70ev;

[0037] Monitoring mode: full scan / selected ion monitoring simultaneous ac...

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Abstract

The invention discloses a method for detecting rongalit in food by a gas chromatograph mass spectrometer. The method comprises the following steps that 1, 1g of food specimens are added into a top hollow bottle; 1 to 3ml pf 0.05 mol/L EDTA (ethylene diamine tetraacetic acid) solution and 1 to 3 ml of 0.05 mol/L sodium acetate solution are added, and the materials are compacted after being uniformly stirred and are fed onto a machine to be tested; 2, the gas chromatograph mass spectrometer is adopted for testing the content of sodium formaldehyde sulfoxylate in the top hollow bottle. The invention aims at providing the method for detecting the rongalit in food by the gas chromatograph mass spectrometer with the advantages that the testing is accurate, the operation is simple, and the time consumption is low.

Description

technical field [0001] The invention relates to the field of detection, in particular to a method for detecting hanging white lumps in food with a gas-phase mass spectrometer. Background technique [0002] GB / T 21126-2007 and DB34 / T 1108-2009 record the method of liquid chromatographic detection of hanging white lumps in food, but the extraction method is used for sample pretreatment, but the method takes a long time to process, and for trace substances There is an error in the extraction. Contents of the invention [0003] The object of the present invention is to provide a gas-phase mass spectrometry method for detecting the hanging white lumps in food with accurate measurement, simple operation and short time-consuming. [0004] The technical scheme of the present invention is: a kind of method that gas-phase mass spectrometry detects the hanging white block in food, comprises the following steps: [0005] Step 1: Add 1g of food sample into the headspace vial, add 1-3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 陈学松邓水德温志芳赖秀梅陈启钊文俊萍
Owner WUZHOU INST FOR FOOD & DRUG CONTROL
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