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Detecting method for trace amount aroma components in natural aromatic product

A detection method and aroma technology, applied in the direction of measurement device, material separation, analysis material, etc., can solve the problem of difficult to analyze non-volatile components, and achieve strong identification and analysis ability, excellent enrichment effect, and high degree of automation. Effect

Inactive Publication Date: 2010-05-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Purge / trap-thermal desorption GC / MS technology is based on adsorption of volatile and semi-volatile components to enrich, so it is difficult to analyze most of the non-volatile components

Method used

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  • Detecting method for trace amount aroma components in natural aromatic product
  • Detecting method for trace amount aroma components in natural aromatic product
  • Detecting method for trace amount aroma components in natural aromatic product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put the clean purge and trap bottle in a constant temperature water bath at 60°C, and pass high-purity nitrogen gas for 10 minutes to remove air impurities in the bottle; weigh 2.0 g of crushed dried lotus leaves, put them into the above purge and trap bottle, and Connect the high-purity nitrogen cylinder, and the other end is connected to the Tenax-TA adsorption tube pre-loaded with 200mg Tenax-TA adsorbent (aging temperature: 300°C, aging for 3h). Put down the Tenax-TA adsorption tube and put protective caps on both ends; put the adsorption tube into the pre-stabilized TDS3 system connected to the GC-MS instrument. MS analysis.

[0031] Its thermal desorption (TDS) parameters: the initial temperature is 40°C, keep it for 2min, rapidly heat up to 260°C at a heating rate of 60°C / min, and keep it for 2min; the transfer line temperature is 280°C, and finally stabilize at 50°C, splitless injection ;

[0032] Cold hydrazine (CIS) parameters: In the standard heating mode, ...

Embodiment 2

[0037]Place the clean purge and trap bottle in a constant temperature water bath at 80°C, and pass high-purity nitrogen gas for 15 minutes to remove air impurities in the bottle; weigh 2.0 g of crushed dried grass fruit, put it into the above purge and trap bottle, and connect one end to the The other end of the high-purity nitrogen cylinder is connected to a Tenax-TA adsorption tube pre-loaded with 200mg of Tenax-TA adsorbent (aging temperature 300°C, aging 3h), nitrogen gas flow is started at a pressure of 0.3MPa, and the stopwatch counts for 25 minutes; when the adsorption is completed, remove the Tenax-TA adsorption tube, with protective caps on both ends; put the adsorption tube into the pre-stabilized TDS3 system connected to the GC-MS instrument, after desorption by the thermal desorption system and enrichment by cold hydrazine, it will be used for GC-MS Analysis, its TDS parameters: initial temperature 40°C, keep 2min, rapidly heat up to 260°C at a heating rate of 60°C / ...

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Abstract

The invention discloses a detecting method for trace amount aroma components in a natural aromatic product. The detecting method mainly comprises steps of: puffing and trapping pre-treatment, puffing and trapping of volatile components, thermal desorption cold hydrazine system enrichment components, GC-MS analyzing and the like. The detecting method enriches substances of the natural product by a sample pretreatment technique-puffing and trapping / thermal desorption; compared with the traditional static headspace, the puffing and trapping technique can analyze volatility and semi-volatile compound with high molecular weight, has stronger analytical capacity on the identification of olefine, is particularly suitable for analyzing trace amount terpene compound with volatility components such as essential oil and the like, does not need using a dissolvent for extraction, can cause experimenters not to expose in potential hazardous chemicals and does not need to carry out waste treatment on the dissolvent. The detecting method has simple operation, high automation degree, environmental friendly, good enrichment effect and high sensitivity.

Description

technical field [0001] The invention relates to a method for detecting aromatic substances in natural aromatic products, more particularly to a method for detecting trace aromatic components in natural products. Background technique [0002] The aroma components of natural aroma products are complex and some of the main aroma components are trace components. Therefore, the analysis and detection of the comprehensive aroma substances of natural products is of great significance for the artificial deployment and utilization of this product. [0003] Currently commonly used detection methods for trace components of natural aromatic products include direct injection GC-MS analysis, solid-phase microextraction GC-MS analysis, purge / trap-thermal desorption GC-MS techniques, etc., among which purge Trap-thermal desorption GC-MS technology is a novel ideal combination technology of sample pretreatment and separation analysis, which has obvious advantages compared with other methods:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/08G01N30/30
Inventor 缪存铅张赟彬宋庆
Owner SHANGHAI INST OF TECH
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