External standard measurement method for benzene and benzene series in glyceryl triacetate by adopting headspace-gas phase mass spectrometry

A technique for the determination of glyceryl acetate and its application in measuring devices, instruments, scientific instruments, etc., which can solve the problems of complicated and time-consuming sample processing, and achieve the effects of simplifying pre-processing steps, reducing processing time, and simple operation

Active Publication Date: 2015-02-04
CHINA TOBACCO GUANGDONG IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses the internal standard method, and t

Method used

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  • External standard measurement method for benzene and benzene series in glyceryl triacetate by adopting headspace-gas phase mass spectrometry
  • External standard measurement method for benzene and benzene series in glyceryl triacetate by adopting headspace-gas phase mass spectrometry
  • External standard measurement method for benzene and benzene series in glyceryl triacetate by adopting headspace-gas phase mass spectrometry

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Example Embodiment

[0031] Example 1: Establish an external standard method for the determination of benzene and benzene series in glycerol triacetate by headspace-gas mass spectrometry

[0032] S1. Preparation of standard working solution: accurately weigh 100mg of benzene, toluene, ethylbenzene, o-xylene, m-xylene and p-xylene standards, put them in the same 100mL volumetric flask, and use chromatographically pure triacetin The volume of the ester is constant, and the first-level mixed standard stock solution with the concentration of each component is 1mg / mL; accurately pipette 1mL of the first-level mixed standard stock solution, place it in a 100ml volumetric flask, and use chromatographically pure triacetin , Obtain the secondary mixed standard stock solution with the concentration of each component of 10ug / mL; accurately pipette 0.01, 0.02, 0.05, 0.1, 0.2, 0.5mL secondary mixed standard stock solution and place them in a 10mL volumetric flask. The chromatographically pure glycerol triacetate ...

Example Embodiment

[0043] Example 2 Practical application example

[0044] Other operations and conditions are the same as those in the embodiment. Five triacetin samples are randomly selected as the detection and analysis objects, and 1.0 mL triacetin samples are accurately pipetted into 10 mL headspace bottles each time, and they are immediately sealed for testing. The test results are shown in Table 3:

[0045] Table 3 Test results of benzene and benzene series in samples

[0046]

[0047] The repeatability and recovery experiment results are shown in Table 4:

[0048] Table 4 Test results

[0049] Compound

[0050] The present invention determines the scientific headspace processing conditions and completes the processing of the sample solution. After the sample is processed scientifically and reasonably by the headspace instrument of the present invention, it is directly imported into the gas chromatography mass spectrometry analysis, which effectively reduces the burden of the existing sample pr...

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Abstract

The invention discloses an external standard measurement method for benzene and benzene series in glyceryl triacetate by adopting headspace-gas phase mass spectrometry. Benzene and benzene series in glyceryl triacetate are determined by using a headspace-gas phase mass spectrometry method; the quantity is fixed by adopting the external standard method, in combination with optimization measures such as taking chromatographic pure glyceryl triacetate as a solvent and a matrix correction agent, and a sample pretreatment method, the detection chromatographic condition is specifically determined, relatively good chromatographic peak separation effects of benzene, methylbenzene, ethylbenzene, o-xylene, m-xylene and paraxylene are ensured, and the external standard measurement method has relatively good linear dependence. The detection limit of benzene and benzene series is 0.01-0.02mug/mL; the relative standard deviation is 1.1%-4.8%; the recovery rate is 89.9%-97.1%; the error and complicated operation caused by sample pretreatment are effectively reduced; and the treatment time is also greatly reduced.

Description

technical field [0001] The invention relates to the technical field of detection, and more specifically relates to an external standard determination method for benzene and benzene series in glycerol triacetate by using headspace-gas mass spectrometry. Background technique [0002] Glycerin triacetate is applied to the tow to prepare a filter rod, which is tipped and packed into a cigarette. The quality of glycerol triacetate not only affects the production and processing of filter rods and the physical indicators of filter rods, but also affects the quality and taste of cigarettes and the health of consumers. [0003] At present, the industrial production of glycerol triacetate usually adopts an acid-catalyzed synthesis method. In order to move the reaction to the direction of producing glycerol triacetate, benzene and benzene series are added. The determination of benzene and benzene series content in triacetin is of great significance to the quality of triacetin, the qua...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 穆小丽梅丹丹杜瑞华孙兆东
Owner CHINA TOBACCO GUANGDONG IND
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