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Sample pre-treatment method for fast detection of phthalic acid ester in emulsion flavor and detection method using the same
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A phthalate ester and sample pretreatment technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of complex operation, large consumption of organic solvent, high cost, etc., and achieve less organic solvent consumption and simple operation , cost reduction effect
Active Publication Date: 2014-12-24
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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Problems solved by technology
According to the above method, the emulsified essence is detected. If the pretreatment is carried out according to the oil-free sample, the extraction cannot be realized due to the emulsifier contained in the emulsified essence, and the detection cannot be carried out; if the pretreatment is carried out according to the oil-containing sample, it takes about 2.5 ~3.0 hours of pretreatment time, at the same time need to consume a large amount of organic solvent, also need to prepare a special gel permeation chromatography device for purification, the operation is complicated and the cost is high
Method used
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[0019] Emulsified strawberry essence is used for the selected emulsified fragrance to be tested.
[0020] Method steps:
[0021] a. Take 1 gram of the emulsified essence to be tested in a glass test tube, add 5 milliliters of n-hexane and mix well to obtain a mixed solution;
[0022] b. Place the glass test tube containing the mixed solution in a water bath at 40°C, and blow the mixed solution dry with nitrogen at the same time;
[0023] c. Add 1 ml of n-hexane to the glass test tube dried with nitrogen, and vortex for 20 seconds at a speed of 3000 rpm, and take the liquid for testing.
[0025] Emulsified cantaloupe essence is used for the selected emulsified fragrance to be tested.
[0026] Method steps:
[0027] a. Take 1 gram of the emulsified essence to be tested in a glass test tube, add 4 ml of n-hexane and mix well to obtain a mixed solution;
[0028] b. Place the glass test tube containing the mixed solution in a water bath at 45°C, and blow the mixed solution dry with nitrogen at the same time;
[0029] c. Add 1 ml of n-hexane to the glass test tube dried with nitrogen, and vortex at 2500 rpm for 25 seconds, and take the liquid for testing.
no. 3 example
[0030] The third embodiment: sample pretreatment method.
[0031] Emulsified peach essence is selected for the emulsified fragrance to be tested.
[0032] Method steps:
[0033] a. Take 1 gram of the emulsified essence to be tested in a glass test tube, add 6 milliliters of n-hexane and mix well to obtain a mixed solution;
[0034] b. Put the glass test tube containing the mixed solution in a water bath at 50°C, and blow the mixed solution dry with nitrogen at the same time;
[0035] c. Add 1 ml of n-hexane to the glass test tube dried with nitrogen, and vortex at 2000 rpm for 30 seconds, and take the liquid for testing.
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Abstract
The invention provides a sample pre-treatment method for fast detection of phthalic acid ester in emulsionflavor. The sample pre-treatment method comprises the following steps of a, adding n-hexane into emulsionflavor to be detected and carrying out mixing to obtain a uniform mixed solution, b, blow-drying the mixed solution in a water bath by nitrogen and c, adding n-hexane into a container subjected to the nitrogen-based blow-drying, carrying out volution and collecting the solution for next detection. The sample pre-treatment method has simple operation processes, short time consumption and less organic solvent use amount, is free of a gel penetration chromatogram device for purification and reduces a cost. The invention also provides a method for fast detection of phthalic acid ester in emulsionflavor. The method comprises the following steps of carrying out pretreatment on the emulsion flavor by the sample pre-treatment method and detecting phthalic acid ester in the pre-treated solution by a gas chromatography-mass spectrometry combined method. The sample pre-treatment method has short operation processes and short operation time, utilizes a less amount of an organic solvent, is free of a gel permeation chromatography device for purification and reduces a detection cost.
Description
technical field [0001] The invention relates to a sample pretreatment method for detecting phthalates and a detection method using the same, and is especially suitable for detecting phthalates in emulsified essence. Background technique [0002] Phthalates (PAEs), also known as phthalates, are a class of chemicals that can soften. It is a general term for about 30 compounds. Its general chemical structure is composed of a rigid plane Aromatic hydrocarbons and 2 plastic non-linear aliphatic side chains. Phthalates are often used as plasticizers in the production of plastics. Phthalates are potentially toxic to animals and exhibit endocrine disrupting properties. [0003] Emulsified flavors are a type of commonly used food flavors. During the processing and transportation of emulsified flavors, there is a risk of contamination by phthalates. Common phthalates include dimethyl phthalate, Diethyl phthalate, diisobutyl phthalate, dibutyl phthalate, bis(2-methoxy)ethyl phthalat...
Claims
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IPC IPC(8): G01N30/06G01N30/02
Inventor 姜瑞清常建军胡桂林陈军宋晓东
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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