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A sample pretreatment method for rapid detection of phthalates in emulsified flavors and a detection method using it
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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: 2016-03-09
蒙牛乳业(马鞍山)有限公司 +1
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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
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no. 1 example
[0018] The first embodiment: sample pretreatment method.
[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.
no. 2 example
[0024] The second embodiment: sample pretreatment method.
[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 pretreatment method for rapid detection of phthalates in emulsified essence, comprising: a. adding n-hexane to the emulsified essence to be tested and mixing to obtain a mixed solution; b. mixing the mixed solution Blow dry with nitrogen in a water bath; c. add n-hexane to the container after blown dry with nitrogen and vortex, take the liquid for testing. The operation is simple, the time is short, the amount of organic solvent is less, and there is no need to use a gel permeation chromatography device for purification, which reduces the cost. The present invention also provides a method for rapidly detecting phthalates in emulsified essence, comprising: pretreating emulsified essence according to the above-mentioned sample pretreatment method; phthalates in the test. The sample pretreatment process is simple, time-consuming, less organic solvent is used, and no gel permeation chromatography device is used for purification, which reduces the cost of detection.
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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