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Micro-fluidic refractive index detection method used for polymerized triglyceride

A differential refraction and triglyceride technology is applied in the field of rapid detection of triglyceride polymers in edible oil, and can solve problems such as being unsuitable for rapid detection and the like

Inactive Publication Date: 2015-04-08
TECHN CENT FOR SAFETY OF INDAL PRODS TIANJIN ENTRY EXIT INSPECTION QUARANTINE BUREAU
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Problems solved by technology

[0005] At present, the detection method of triglyceride polymer is mainly based on high-performance liquid chromatography (HPLC) and high-performance space-exclusion chromatography (HPSEC), and the detector usually uses a differential refractive index detector (RI). It has the advantages of good performance, but it needs to be based on sophisticated and expensive HPLC equipment and professional operators, and is not suitable for on-site rapid detection

Method used

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  • Micro-fluidic refractive index detection method used for polymerized triglyceride
  • Micro-fluidic refractive index detection method used for polymerized triglyceride

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Embodiment 1

[0025] Example 1 Detection experiment of triglyceride polymer in oil sample

[0026] Rinse the chip and all connected pipelines with ultrapure water, and rinse the chip and all pipelines with tetrahydrofuran for 15 min after exhausting the air bubbles. 50 mg of oil sample was dissolved in 2 mL of tetrahydrofuran, dried over anhydrous sodium sulfate, filtered, and 0.8 μL was taken for injection. Tetrahydrofuran was used as the mobile phase, the flow rate was 20 μL / min, the temperature of the microfluidic chip and the differential refractive index detector was controlled at 35 ° C, the relative content of triglyceride polymer in the sample was calculated by the peak area normalization method, and the peak area was calculated by the chromatographic workstation. Accurate quantification, the recovery rate of the method is within 80-110%, and the relative standard deviation is less than 5%.

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Abstract

The invention discloses a micro-fluidic refractive index detection method used for polymerized triglyceride. By means of the method, the advantage that the efficient space exclusion chromatography is high in flexibility is kept, a detection instrument is effectively simplified and minimized through the micro-fluidic chip analysis technology, the detection device can serve as a portable analysis technical platform to conduct field detection on oil and fat, and the foundation is laid for rapid, flexible and accurate detection technologies and devices of triglyceride polymers in edible oil and fat samples.

Description

Technical field [0001] The present invention involves a method of detecting polymer glycerol triglyceride based on micro -current control difference, which involves a fast detection method of triglyceride polymer in edible oil. Background technique [0002] Triallglycerols (TAGS) is the most important ingredient of edible oil. It is shown in its structural formula by 1 glycerol molecule and 3 fatty acid molecules.Oil oxidation will produce triglycerides polymer (TGP), which mainly include triglycerides dimmer (TGD) and triglycerides oligomer (TGO). [0003] (I) [0004] The degree of oil oxidation can reflect the poor changes in the quality of oil and fat. Traditional oil degradation index peroxidine (POV), acid prices (AV), pyrine basis value, methamphetamine value, sulfurbal acid value and polar compounds, etc.It is difficult to evaluate the oxidation and hydrolysis status of newly processed oil. It has proved that the content of polar compounds (PCS) such as triglyceride and...

Claims

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Application Information

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IPC IPC(8): G01N30/88
Inventor 柳明贾晓川李晶王娜曹丽静李学洋于燕燕
Owner TECHN CENT FOR SAFETY OF INDAL PRODS TIANJIN ENTRY EXIT INSPECTION QUARANTINE BUREAU
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