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Method for determining contents of benzene and benzene-series substances in tobacco-use triacetin

A technology for glyceryl acetate and benzene series, which is applied in the field of determining the content of benzene and benzene series in glycerol triacetate for cigarettes, to achieve the effects of reducing errors, ensuring accuracy, and good practicability

Inactive Publication Date: 2013-01-02
CHINA TOBACCO JIANGSU INDAL
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned methods are mainly based on gas chromatography for detection, and have certain limitations in the qualitative confirmation and accurate quantification of trace amounts of benzene and benzene series in samples.

Method used

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  • Method for determining contents of benzene and benzene-series substances in tobacco-use triacetin
  • Method for determining contents of benzene and benzene-series substances in tobacco-use triacetin
  • Method for determining contents of benzene and benzene-series substances in tobacco-use triacetin

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Embodiment 1

[0037] A method for measuring the content of benzene and benzene series in glycerol triacetate for cigarettes, the flow chart is as follows figure 1 As shown, the specific steps are:

[0038] (1) Configuration of internal standard extraction solution;

[0039] Weigh 0.05g of internal standard 2-hexanone in a 100mL volumetric flask, dilute to the volume with n-pentane, and prepare an internal standard stock solution of 2-hexanone with a concentration of 0.5g / L. Sealed and stored away from light at 0-4°C, the validity period is 3 months; then take 100 μL internal standard stock solution, use n-pentane as solvent, dilute to 100 mL, and prepare the internal standard with a concentration of 0.5 mg / L Extract.

[0040] (2) Configuration of standard working solution;

[0041] Accurately weigh 0.5g of benzene, toluene, ethylbenzene, o-xylene, m-xylene, and p-xylene respectively in a 100mL volumetric flask, dilute to volume with n-pentane, and prepare a mixture with a concentration o...

Embodiment 2

[0063] The present embodiment is as follows to the detection method of repeatability of the present invention and standard addition recovery rate:

[0064] Using a sample of glycerol triacetate for cigarettes, the spiked recovery rate experiment was carried out (the measured value was not detected). The spiked levels were 0.1 μg / mL and 0.5 μg / mL. The results are shown in Table 4 below. It can be seen from Table 4 that the average relative standard deviation is between 2.02% and 7.01%, and the recovery rate of standard addition is between 89.0% and 108.5%, indicating that the method has good repeatability and high recovery rate.

[0065] Table 4 Recovery rate and relative standard deviation of the method (n=5)

[0066]

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Abstract

The invention discloses a method for determining the contents of benzene and benzene-series substances in tobacco-use triacetin. The method comprises the steps of internal standard extract preparation, standard working solution preparation, sample solution preparation, gas chromatography-mass spectrometry analysis, determination result calculation, and the like. The invention adopts an internal standard method in quantitation. An optimized detection method has the advantage of simple and accurate operation, such that errors brought by pretreatments and instrument precision are effectively reduced. With the adopted chromatographic conditions, separations of chromatographic peaks of 6 target objects and internal standards are good, and the chromatographic peaks have good linear correlation. A detection limit is 0.01-0.02mug / g, an average relative standard deviation is 2.02-7.01%, and a standard addition recovery rate is 89.0-108.5%. The method has the advantages of high sensitivity, good repeatability, high recovery rate, and the like. The method has good practicality.

Description

technical field [0001] The invention belongs to the technical field of cigarette physical and chemical index detection, and in particular relates to a method for measuring the content of benzene and benzene series in triacetin for cigarettes. Background technique [0002] Glyceryl triacetate is a plasticizer commonly used in cellulose acetate filter rods. In order to achieve sufficient hardness, the target dosage of triacetin is generally 6% to 10% of the weight of the entire filter rod. In addition, in the dilution process of the essence liquid, in addition to the most commonly used solvents such as ethanol and propylene glycol, sometimes glycerol triacetate is used as a solvent in order to fully and uniformly dilute some specific essence liquid components. [0003] The preparation of triacetin in industrial production usually adopts acid-catalyzed synthesis method: this method is to esterify glycerin with acetic acid to obtain triacetin. In order to speed up the esterific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 廖惠云庄亚东王瑞李朝建刘献军张映熊晓敏
Owner CHINA TOBACCO JIANGSU INDAL
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