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Determination method of total sulfur content in food by ion chromatography

A technology of ion chromatography and total sulfur content, which is applied in the field of total sulfur content detection, can solve the problems such as the detection standard of total sulfur content in food has not been formulated, and achieves the effects of being beneficial to diet, less matrix interference, and simple method.

Active Publication Date: 2022-02-22
镇江海关综合技术中心 +2
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Problems solved by technology

So far, our country has not formulated the detection standard of total sulfur content in food

Method used

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  • Determination method of total sulfur content in food by ion chromatography
  • Determination method of total sulfur content in food by ion chromatography
  • Determination method of total sulfur content in food by ion chromatography

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Embodiment Construction

[0023] The materials and instruments involved in the detection method of the present invention are as follows:

[0024] Ion chromatography and microwave digestion, ashing system:

[0025] Dionex ICS-3000 ion chromatograph: equipped with Dionex AERS 500 suppressor, Dionex AS autosampler (Dionex, USA); XPE205 electronic balance: sensitivity 0.01mg (Mettler, Switzerland); Ultrawave microwave digestion System (Milestone Company, Italy); RYROXL microwave ashing system (Milestone Company, Italy); DS-1 tissue grinder (Shanghai Youyi Instrument Co., Ltd., China); BHW-09A16 flat heater (Shanghai Botong Chemical Technology Co., Ltd., China).

[0026] Auxiliary detection instrument

[0027] Agilent 7890A gas chromatograph, equipped with FID detector (GC), Agilent Technologies 6540UHDAccurate-Mass Q-TOF liquid chromatography time-of-flight mass spectrometer, equipped with ESI source (LC-Q-TOF), Agilent Technologies7000GC-MS Triple Quad gas chromatograph connected in series Mass spectro...

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Abstract

The detection method for determining the total sulfur content in food by ion chromatography, the steps include: 1) Sample pretreatment: A, digest the sample with nitric acid and then heat it to dryness; B, dissolve the obtained residue with water, add a combustion enhancer to cover the bottom of the container; Then add the Eschka reagent and the combustion enhancer to mix thoroughly, then add the Eschka reagent to cover the combustion enhancer; then carry out microwave ashing; the content after microwave ashing is dissolved in water, boiled and then cooled, and the supernatant is taken through the water phase membrane and then ion chromatography Detection; 2) Ion chromatography detection: mobile phase: phase A: deionized water, phase D: 100mmoL / L sodium hydroxide, gradient elution. The method is simple and has little matrix interference; parameters such as precision, accuracy (bias), and detection limit can meet the requirements of relevant technical specifications, and can be applied to the detection of total sulfur in commercially available food.

Description

technical field [0001] The invention relates to a detection method for the total sulfur content of food, in particular to a detection method for detecting the total sulfur content in food by means of an ion chromatograph. Background technique [0002] Sulfur is one of the indispensable chemical elements in the human body. It is an important component of cell protein, tissue fluid, and various coenzymes; it is also an important component of amino acids (methionine) and vitamins (vitamin B1) necessary for the human body. Sulfur is the seventh largest element that makes up the human body, and its main source is food. Cereals, root crops, dairy products, meat, etc. are rich in sulfides. The ratio of sulfur: nitrogen in plant tissues needs to be maintained at 1:20-1:35; the ratio of sulfur: nitrogen in human tissues is 1:14.5. Partial eclipse or insufficient intake of sulfur-containing foods, especially those that limit amino acids Insufficient intake will break the rules of "n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/96G01N30/06G01N1/44
CPCG01N30/96G01N30/06G01N1/44
Inventor 周洪斌王苏华李丽糜玉婷
Owner 镇江海关综合技术中心