Gas chromatography/ mass spectrometry method for detecting dioctyl terephthalate in Luzhou-flavor Daqu base liquor
A technology for dioctyl phthalate and mass spectrometry analysis, which is applied in the field of gas chromatography/mass spectrometry to detect dioctyl terephthalate in Luzhou-flavor Daqu original wine, can solve the problems of high analysis cost and long time, and achieve detection Low cost, high accuracy, fast results
Inactive Publication Date: 2016-07-20
JING BRAND
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[0004] The purpose of the present invention is to solve the problems of high analysis cost and long time in the current analysis method of dioctyl terephthalate, and provide a gas chromatography mass spectrometry analysis method for detecting dioctyl terephthalate in Luzhou-flavor Daqu original wine method
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[0016] This embodiment takes Luzhou-flavor Daqu wine sample as an example, and uses gas chromatography / mass spectrometry to detect the content of dioctyl terephthalate, see Figure 1-2 , including the following steps:
[0017] (1) Sample pretreatment: Measure 5.0mL of Luzhou-flavor Daqu wine sample, add 2.0mL of n-hexane, vortex and oscillate for 5 minutes, let stand for stratification, and take the supernatant as the sample to be tested;
[0018] (2) Preparation of standard samples: Accurately weigh 15.76mg of dioctyl terephthalate standard samples and place them in a 100ml volumetric flask, dissolve them in n-hexane, dilute to volume, and shake well to obtain a standard with a concentration of 157.6mg / L Sample stock solution: Accurately measure 10.0mL standard sample stock solution in a 100mL volumetric flask, dilute it with n-hexane and shake well to obtain a standard sample solution with a concentration of 15.76mg / L; accurately measure standard sample solution 0.625 Put m...
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Abstract
Disclosed is a gas chromatography / mass spectrometry method for detecting dioctyl terephthalate in Luzhou-flavor Daqu base liquor. The gas chromatography / mass spectrometry method includes extracting a Luzhou-flavor Daqu base liquor sample by normal hexane, using supernatant liquid as a solution to be detected, preparing standard solutions with dioctyl terephthalate concentrations being 98.5 microgram / L, 197 microgram / L, 394 microgram / L, 788 microgram / L and 1576 microgram / L, setting gas chromatography / mass spectrometry conditions, detecting standard samples and the solution to be detected respectively, and computing content of the dioctyl terephthalate in the Luzhou-flavor Daqu base liquor sample by a peak area normalization method according to detection results of the standard samples. The gas chromatography / mass spectrometry method for detecting the dioctyl terephthalate in the Luzhou-flavor Daqu base liquor has the advantages of simplicity, low detection cost, high speed, little interference during detection, good result repeatability and high accuracy and is mainly used for detecting content of the dioctyl terephthalate in liquor.
Description
technical field [0001] The invention relates to the technical field of analysis and detection of wine, in particular to a gas chromatography / mass spectrometry analysis method for detecting dioctyl terephthalate in Luzhou-flavor Daqu raw wine. Background technique [0002] Dioctyl terephthalate is a new type of plasticizer, which has the characteristics of heat resistance, cold resistance, low volatility, anti-extraction, flexibility and good electrical insulation performance. It can be widely used in artificial leather, polyurethane, PVC cable materials, plastics, etc. Films, plastic sandals, foam sandals, door and window seals, PVC profiled materials, soft boards, various soft and hard pipes, decorative materials, foamed hard boards, and other products that use plasticizers. [0003] The molecular structure of plasticizers is similar to that of hormones, and they are called "environmental hormones". They are toxic chemicals listed by the Environmental Protection Agency of T...
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Login to View More IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/025
Inventor 许银王喆韩娇孙细珍刘源才
Owner JING BRAND