Application of hydroxyl-containing compound, matrix improver and analysis method of flavor components in tobacco
A technology for hydroxy compounds and aroma components, which is applied in analytical materials, material separation, measurement devices, etc., can solve the problems of limited protection of the analyte and limited application scope of gas chromatography analysis methods.
Pending Publication Date: 2021-08-03
ZHENGZHOU TOBACCO RES INST OF CNTC
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Problems solved by technology
However, due to the strong polarity of these compounds, they need to be dissolved with a strong polar solvent (such as acetonitrile), and even need to add a certain amount of water for auxiliary dissolution, which limits their application range in gas chromatography analysis methods
At the same time, since the hydroxyl groups are all over the compound molecules, these compounds are freely and randomly adsorbed on the active sites after entering the gas chromatography, although the adsorption of the original active sites to sensitive compounds is reduced, and the hydroxyl groups exposed in the gas phase flow path At the same time, it becomes a new adsorption site, and the protection effect of the analyte is limited.
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Embodiment 1
[0048] The matrix modifier for gas chromatographic analysis in this example consists of functional compounds and organic solvents; the functional compounds are monobutyl glycerol, isooctyl glycolate, monoglyceride caprate, and monoglyceride octadecanoate The combination of glycerol monobutyl ether, isooctyl glycolate, capric acid monoglyceride, octadecanoic acid monoglyceride in the matrix improver is respectively 2000ppm, 2000ppm, 10000ppm and 10000ppm; the organic solvent is dichloro methane.
Embodiment 2
[0050] The matrix modifier used for gas chromatographic analysis in this embodiment is composed of functional compounds and organic solvents; , Glyceryl monocaprylyl ether and lauryl monoglyceride are respectively 4000ppm, 4000ppm and 20000ppm in concentration in the matrix improver; the organic solvent is methanol.
Embodiment 3
[0052] The matrix modifier used for gas chromatographic analysis in this example is composed of functional compounds and organic solvents; The concentration of glycerol monoheptyl ether and cetyl monoglyceride in the matrix improver is respectively 4000ppm, 4000ppm and 20000ppm; the organic solvent is acetone.
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The invention relates to application of a hydroxyl-containing compound, a matrix improver and an analysis method of flavor components in tobacco, and belongs to the technical field of chemical analysis and testing. According to the application of the hydroxyl-containing compound in inhibition of gas chromatography active site adsorption, the hydroxyl-containing compound is a compound with a structure as shown in a formula I or a formula II; in the formula I, R1 is selected from C2-C18 alkyl; in the formula II, R2 is selected from C2-C18 alkyl acyloxy or C2-C18 alkyl, and n is 1 or 2. According to the application of the hydroxyl-containing compound, the compound shown in the formula I or the formula II is added into a to-be-detected solution and mixed with the to-be-detected solution uniformly, then sample introduction is performed; the compound shown in the formula I or the formula II can rapidly fill active sites in a gas chromatography sample introduction port, a chromatographic column and a detector, alkyl inert groups are exposed in a gas phase flow path, and new adsorption sites cannot be formed, and therefore, the influence of active site adsorption on a detection result in a gas chromatographic analysis process is reduced.
Description
technical field [0001] The invention relates to an application of hydroxyl-containing compounds in inhibiting the adsorption of active sites of gas chromatography, a matrix modifier, and an analysis method for aroma components in tobacco, belonging to the technical field of chemical analysis and testing. Background technique [0002] As a separation technique for compounds in complex matrices, gas chromatography is widely used in chemical analysis and detection. However, due to the presence of active sites on the surface of the gas chromatography flow path (including the inlet, chromatographic column, and detector), sensitive compounds are adsorbed or degraded on the active sites, resulting in compound loss or chromatographic peak tailing, and the detection limit is high and are more susceptible to interference. In addition, there is also a matrix effect in the gas phase analysis process. When the matrix passes through the gas chromatography flow path, high boiling point po...
Claims
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IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/884
Inventor 潘立宁王晓瑜秦亚琼陈满堂赵阁樊美娟崔华鹏华辰凤余晶晶刘绍锋刘克建赵晓东
Owner ZHENGZHOU TOBACCO RES INST OF CNTC