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A kind of assay method of acetic acid content in glycerol triacetate

A technology for the content of glyceryl acetate and acetic acid, which is applied in the field of tobacco, can solve the problems of cumbersome operation, high value of acetic acid content measurement results, and accelerated hydrolysis reaction rate, etc., and achieve the effects of good repeatability, high sensitivity, and simple operation

Active Publication Date: 2016-01-20
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when manually titrating with a basic burette, the operation is cumbersome. More importantly, in the titration process of triacetin acidity, the hydrolysis reaction of triacetin will occur at the same time to generate acetic acid, and with the sodium hydroxide standard titration With the continuous addition of the solution, under the action of NaOH, the rate of the hydrolysis reaction is accelerated, resulting in a high value for the determination of the acetic acid content.

Method used

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  • A kind of assay method of acetic acid content in glycerol triacetate
  • A kind of assay method of acetic acid content in glycerol triacetate
  • A kind of assay method of acetic acid content in glycerol triacetate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 0.0200g of n-butyric acid standard in a 100mL volumetric flask, accurate to 0.1mg, and dilute to the mark with methyl tert-butyl ether.

[0039] sample handling

[0040] Use a piston pipette to pipette 1mL triacetin sample A into a 50mL conical flask with stopper, add 1mL internal standard solution, and add 9mL methyl tert-butyl ether, shake well for later use.

[0041] Preparation of standard working solution

[0042] Weigh 0.0200g (accurate to 0.1mg) standard acetic acid, place it in a 10mL volumetric flask, and dilute to the mark with methyl tert-butyl ether, and this solution is the standard stock solution. Accurately pipette 0.05mL, 0.1mL, 0.2mL, 0.4mL, 0.6mL, 0.8mL of the standard stock solution, place them in 10mL volumetric flasks, add 1mL of internal standard solution accurately, and dilute with methyl tert-butyl ether To the mark, a series of standard working solutions are obtained. The concentrations of the prepared series of standard working solutio...

Embodiment 2

[0054]

[0055] It can be seen from Table 5 that RSD%=1.9 (n=6), and the method has good repeatability.

[0056] Comparison with YC144-2008 acidity results

[0057] According to YC144-2008, the unit of acidity in glycerol triacetate is percentage content. Therefore, the concentration measured by the method of the present invention is converted into percentage content and its comparison is shown in Table 6. It can be seen that the two are basically consistent.

[0058]

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Abstract

The invention belongs to the technical field of tobacco, and specifically discloses a method for determining the content of acetic acid in glycerol triacetate for cigarettes: use methyl tert-butyl ether to dilute and extract the acetic acid in glycerol triacetate, and add a certain concentration of internal standard, gas phase Chromatography mass spectrometry, internal standard method for quantification. The method of the present invention overcomes the deficiencies of the prior art sample processing and assay methods, optimizes the sample pretreatment method and instrument detection conditions, and has the following excellent effects compared with the prior art: the method is easy to operate, accurate, high in sensitivity and precision , good repeatability.

Description

technical field [0001] The invention belongs to the technical field of tobacco, and in particular relates to a method for determining the content of acetic acid in glycerol triacetate for tobacco. Background technique [0002] Glyceryl triacetate for cigarettes is commonly known as filter rod plasticizer, also known as filter rod curing agent. It is a kind of cellulose diacetate tow that can be solidified and formed to increase the hardness and plasticity of the filter rod. It meets the requirements of cigarette tipping production technology and consumers. Materials for sensory requirements can also modify the chemical properties of smoke, and serve the purpose of removing impurities, purifying, and reducing harm. [0003] Glycerol triacetate is produced by esterification reaction of glycerol (glycerin) with acetic acid (acetic acid) or acetic anhydride (acetic anhydride) under the action of an acidic catalyst. In order to fully esterify glycerol, it is often used in the pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 蒋锦锋范黎李栋贺琛陈连芳胡启秀孟庆华杨荣超叶长文赵继俊
Owner ZHENGZHOU TOBACCO RES INST OF CNTC