Gas chromatography-mass spectrometry detection method of three very long chain fatty acids in human serum

A very long-chain fatty acid and gas chromatography technology, applied in the field of detection of very long-chain fatty acids, can solve the problems of complex, unfavorable and stable results of very long-chain fatty acids, and low extraction efficiency, so as to simplify the pretreatment process, save processing time, The effect of high extraction efficiency

Active Publication Date: 2014-03-19
昆明金域医学检验所有限公司
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Problems solved by technology

[0009] For the removal of sterol impurities, when the silane derivatization method is used, the solution is acidified with hydrochloric acid after hydrolysis, and extracted with n-hexane. This step extracts fatty acids and non-polar sterol compounds at the same time, and then adds hydroxide Potassium, which causes the saponification reaction of fatty acids, exists in the water phase layer in an ionized state, and the sterol impurities without carboxyl groups remain in the organic phase layer because they have not undergone saponification reaction, and are removed by discarding the organic phase layer Most of the sterol impurities, and then add hydrochloric

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  • Gas chromatography-mass spectrometry detection method of three very long chain fatty acids in human serum
  • Gas chromatography-mass spectrometry detection method of three very long chain fatty acids in human serum
  • Gas chromatography-mass spectrometry detection method of three very long chain fatty acids in human serum

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[0061] In order to make the above objects, features and advantages of the embodiments of the present invention more obvious and comprehensible, the embodiments of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0062] Determination of the content of VLCFA in serum has important medical value, such as:

[0063] The abnormal accumulation of VLCFA in serum can reflect the abnormal function of enzymes involved in the VLCFAβ-oxidation process in peroxisomes, which hinders the β-oxidation of VLCFA and causes VLCFA aggregation. The accumulation of VLCFA in the nervous system can destroy the normal formation of myelin sheath and the stability of myelin sheath, causing a series of neurological symptoms, mainly manifested as abnormal behavior, cognition, emotion, vision and hearing loss, etc.; in adrenal cortical cells Aggregation can cause the function of the adrenocorticotropic hormone (ACTH) receptor on the surfac...

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Abstract

The invention provides a gas chromatography-mass spectrometry detection method of three very long chain fatty acids in a human serum. The method comprises the following steps (1) carrying out pretreatment on a human serum sample to obtain a derivative product; (2) detecting the derivative product by using a gas chromatography-mass spectrometer; (3) carrying out qualitative analysis on each very long chain fatty acid in the human serum sample according to a total ion chromatogram and a mass spectrogram of the derivative product, and calculating the content of each very long chain fatty acid in the human serum sample according to a selective ion chromatogram, wherein each very long chain fatty acid comprises docosanoic acid, tetracosanoic acid and hexacosanoic acid. Compared with the background art, the pretreatment process disclosed by the invention is fast, sensitive and accurate.

Description

technical field [0001] The invention relates to the technical field of very long-chain fatty acid detection, in particular to a gas chromatography-mass spectrometry detection method for three very long-chain fatty acids in human serum. Background technique [0002] The VLCFA (very-long-chain fatty acids) in the body mainly include docosanoic acid (C22:0), tetracosanoic acid (C24:0) and hexacosanoic acid (C26:0 ) 3 species, which can only undergo β-oxidation in peroxisomes. VLCFA mainly exists in the form of esters in the body, including triglycerides, phospholipids, glycolipids, etc., but a small part exists in free form or bound to serum albumin. [0003] Determination of the content of VLCFA in serum can be used to assist in the diagnosis of genetic metabolic diseases related to suspected peroxisome metabolic disorders, including peroxisome biogenic disorders, X-linked adrenoleukodystrophy and peroxidase Physical function assessment, etc. [0004] Currently, gas chromat...

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 李维程雅婷赵蓓蓓刘伟霞吴华顺
Owner 昆明金域医学检验所有限公司
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