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Methods of analysis of fatty acid salts
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A fatty acid salt and analysis method technology, which is applied in the field of fatty acid analysis, can solve the problems of characteristic peak interference, affecting the accurate qualitative of fatty acid salt mixture, etc., and achieve the effects of high accuracy, simple and direct separation results, and simple and convenient operation
Active Publication Date: 2017-10-27
上海微谱检测科技集团股份有限公司
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Problems solved by technology
[0002] In the prior art, the characterization of fatty acid salt mixtures is mostly directly characterized by IR or NMR, and the type of fatty acid is determined through characteristic peaks. However, due to the use of fatty acid salt mixtures in combination with various complex organic or inorganic compounds, this It brings a lot of interference to the characteristic peaks, which affects the accurate characterization of the fatty acid salt mixture
At the same time, because the amount of the fatty acid salt mixture is generally not much, the accurate qualitative of the fatty acid salt mixture is also affected when the content is very small.
Also do not have a kind of method of accurate qualitative fatty acid salt mixture in the prior art
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Embodiment 1
[0072] Composition of Fatty Acid Blend: Benzoate, Sodium Sulfate.
[0073] Pre-processing method:
[0074] Add 15% hydrochloric acid to the fatty acid salt mixture, shake it, and react to generate fatty acid; the reaction time is 10 minutes;
[0075] Add xylene to extract fatty acid to obtain an extract containing fatty acid.
[0076] The extract is detected by GC-MS, and the obtained spectrum is shown in figure 1 , it can be seen that the substance in the obtained extract is benzoic acid.
Embodiment 2
[0078] Composition of fatty acid mixture: sodium linoleate, mineral spirits.
[0079] Pre-processing method:
[0080] drying the fatty acid salt mixture to obtain the fatty acid salt mixture;
[0081] Add hydrochloric acid in fatty acid salt mixture, react and generate fatty acid; Reaction time 10 minutes;
[0082] Add xylene to extract fatty acid to obtain an extract containing fatty acid.
[0083] The extract is detected by GC-MS, and the obtained spectrum is shown in figure 2 , it can be seen that the substance in the obtained extract is linoleic acid.
Embodiment 3
[0085] Components of fatty acid mixture: sodium oleate, phosphate esters, mineral spirits, antioxidants.
[0086] Pre-processing method:
[0087] After drying the fatty acid salt mixture, add ethanol to dissolve, filter, take the insoluble matter, and dry to obtain the fatty acid salt mixture;
[0088] Add sulfuric acid to the fatty acid salt mixture to fully dissolve the reaction so that the reaction generates fatty acids;
[0089] Add toluene to extract the fatty acid to obtain an extract containing fatty acid.
[0090] The extract is detected by GC-MS, and the obtained spectrum is shown in image 3 , it can be seen that the substance in the obtained extract is oleic acid.
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Abstract
The invention provides a fatty acid salt analysis method, comprising the following steps: adding an inorganic acid to a fatty acid salt mixture to react to generate a fatty acid; adding a second organic solvent to extract the fatty acid to obtain an extract containing the fatty acid. The method is simple and convenient to operate, without too many precision operation requirements; the requirements for chemical reagents and instruments are low, and ordinary chemical instruments and reagents can meet the requirements, and the separation results are simple and direct, avoiding the inaccurate type of indirect judgment of previous test methods.
Description
technical field [0001] The present invention relates to an analysis method of fatty acid, especially, also relates to the qualitative method of fatty acid salt. Background technique [0002] In the prior art, the characterization of fatty acid salt mixtures is mostly directly characterized by IR or NMR, and the type of fatty acid is determined through characteristic peaks. However, due to the use of fatty acid salt mixtures in combination with various complex organic or inorganic compounds, this It brings great interference to the characteristic peaks and affects the accurate characterization of the fatty acid salt mixture. Simultaneously, because the consumption of fatty acid salt mixture is generally not much, under the situation of very little content, also influenced the accurate qualitative of fatty acid salt mixture. There is no method for accurately characterizing fatty acid salt mixtures in the prior art. Contents of the invention [0003] In order to solve the a...
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