Method for determining water content in glyceryl triacetate

Abstract

The invention discloses a method for determining water content in glyceryl triacetate, which comprises the steps of preparing an internal standard solution, preparing a standard working solution, preparing a sample solution, carrying out gas chromatographic analysis, drawing a standard curve and calculating results. The method disclosed by the invention firstly realizes effective detection of microgram level water content in glyceryl triacetate, improves the sensitivity of trace water content, and can reduce the errors caused by the problems of pretreatment method repeatability of and instrument precision. The adopted chromatographic conditions result in good separation degree of the chromatographic peaks of a target compound and an internal standard, and good linear correlation between the chromatographic peaks of target compound and the internal standard, and the detection limit is in a range of 0.01-0.02mug / g. The method disclosed by the invention has a mark-on recovery rate in a range of 88-98% and a mean relative standard deviation (RSD) in a range of 4.0-5.6, indicating high recovery rate and good repeatability.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical testing of cigarette materials, and relates to the detection of additive components for cigarettes, in particular to a method for detecting the water content in the additive (glycerol triacetate) for cigarette mouthpieces. Background technique [0002] Glyceryl triacetate is used as a plasticizing and curing agent for cigarette filter rods-cellulose diacetate, and its moisture detection is one of the important items, which is of great significance to the production quality control of fiber filter rods. [0003] During the cigarette production process, monitor to prevent the moisture content of glycerol triacetate from exceeding the standard. The main reasons are as follows: First, too much water will affect the plasticizing effect and affect the hardness and molding of the acetate filter rod. Second, too much water will cause the decomposition of triacetin, which will reduce the est...

AI Technical Summary

Problems solved by technology

The main reasons are: 1. Excessive moisture will affect the plasticizing effect and affect the hardness and molding of acetate filter rods.

Second, too much water will cause the decomposition of triacetin, which will reduce the ester content and produce acidic substances, which is often called "pantothenic acid". The sour substances enter the filter rod and affect its taste; reduce the ester content, Reduced curing efficiency

The use of glycerol triacetate with too high moisture will inevitably increase the amount of application and increase the cost, and the molding and curing time of the produced nozzle sticks will be prolonged and irregular, which will affect the quality control of the process

[0004] The currently prevailing trace moisture detection method is the Karl Fischer method, which is single and has the following disadvantages:

[0005] ①The main reagents used in the experiment: Karl Fischer reagent and methanol are toxic and expensive, and the waste liquid treatment is difficult

[0006] ②The experimental process is greatly affected by the ambient temperature and humidity

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