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Nonaqueous titration method for determining acidity of glyceryl triacetate

A triacetin, non-aqueous titration technology, applied in the direction of material electrochemical variables, etc., can solve the problems of difficult observation of titration end point, difficult accurate titration, unstable pH value, etc.

Inactive Publication Date: 2012-03-14
CHINA TOBACCO FUJIAN IND
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Problems solved by technology

However, Liang Lili and others observed that the titration end point of this method is not easy to observe, the pH value after the equivalence point is unstable, and theoretical calculations also show that it is not easy to titrate accurately, so they think that the current acid-base titration method needs to be discussed (Liang Lili, Xueping Bai, Yong Wuyong Zhuang. Discussion on technical indicators and detection methods of glyceryl triacetate. Proceedings of the 2004 China Tobacco Tobacco Chemistry Group Annual Conference and Academic Symposium, 2004: 205-208)

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  • Nonaqueous titration method for determining acidity of glyceryl triacetate
  • Nonaqueous titration method for determining acidity of glyceryl triacetate
  • Nonaqueous titration method for determining acidity of glyceryl triacetate

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Embodiment Construction

[0014] A non-aqueous titration method for measuring triacetin acidity, the steps are:

[0015] step 1:

[0016] Preparation of titrant: Weigh 1.5-1.6g of KOH standard solution, add about 200mL of absolute ethanol, dissolve completely by ultrasonication, add about 2.15L of absolute ethanol, and store in a brown bottle. The exact concentration of KOH was calibrated before each experiment.

[0017] Step 2:

[0018] Calibration of the titrant: pipette 3 parts of the same volume of absolute ethanol as the blank solvent, titrate to the equivalence point, obtain the volume of the consumed titrant and calculate the average V blank . Then weigh 3 parts of about 0.01g potassium hydrogen phthalate standard substance which was dried at 105°C for 2h, add 1mL of ultrapure water, shake to dissolve, add the same volume of absolute ethanol as the blank solvent, and titrate respectively To the equivalence point, the volume V of titrant consumed is obtained. Calculate the concentration C of...

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Abstract

The invention discloses a nonaqueous titration method for determining the acidity of glyceryl triacetate. The method is characterized in that: waterless ethanol is used to dilute glyceryl triacetate as a diluent, a KOH standard solution is used as a titrant, an automatic potentiometric titration process is adopted to titrate, the end point is automatically determined by a titrator, and the acidity (by acetate) is obtained through calculating by the titrator. The method for rapidly and precisely determining the acidity of glyceryl triacetate, which is provided in the invention and can be used to control the quality of glyceryl triacetate, provides a technical support for the practical production of glyceryl triacetate.

Description

technical field [0001] The invention relates to a non-aqueous titration method for measuring the acidity of glyceryl triacetate, which is used for quality control of a plasticizer (glyceryl triacetate) for cigarette filter rods. Background technique [0002] Glyceryl triacetate is often used as a plasticizer and curing agent for cellulose acetate in the process of tobacco processing and production to improve the tipping characteristics of filter rods and cigarettes, and to improve the thermal collapse resistance of filter rods (Wang Hongfa. Various tobacco accessories and cigarettes The relationship between tar production and intake. Tobacco Science Research, 2000, 2: 51-57), can provide good elasticity, air permeability and appropriate hardness for cigarette filter rods (Liang Lili, Bai Xueping, Zhuang Wuyong. Triacetic acid Discussion on technical indicators and detection methods of glycerides. Proceedings of the 2004 China Tobacco Tobacco Chemistry Group Annual Conference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/42
Inventor 周培琛刘泽春黄华发张峰张鼎方刘江生赖伟玲
Owner CHINA TOBACCO FUJIAN IND
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