A Method for Accurately Determining the Softening Point of Rosin Using Temperature Programmed Headspace Gas Chromatography

A headspace gas chromatography and temperature-programmed technology is applied in the field of detection of rosin properties, which can solve the problems of cumbersome and time-consuming measurement steps, and achieve the effects of simple operation, overcoming the complexity of instruments, and improving accuracy.
CN108535312BActive Publication Date: 2021-02-02CHINA TOBACCO YUNNAN IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA TOBACCO YUNNAN IND
Publication Date
2021-02-02

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Abstract

The invention discloses a method for accurately measuring the softening point of rosin by means of headspace gas chromatography with programmed temperature rise. Rosin solids contain some volatile impurities, which can escape rapidly when rosin is melted. The volatile impurities were measured by temperature-programmed headspace gas chromatography, and the relationship between temperature and impurity signals was plotted. The turning point of the signal change in the curve was the softening point of rosin. The method has the advantages of fast determination, objective and accurate results, simple and convenient operation, and can realize the batch detection of the softening point of rosin, and is applicable to the method for accurately determining the softening point of rosin by headspace gas chromatography under actual production conditions in factories and laboratories. It overcomes the drawbacks of the current method for measuring the softening point of rosin, such as complex instruments, large errors, low efficiency, and great difficulty in popularization.
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Description

technical field

[0001] The invention relates to the technical field of detection of rosin properties, in particular to a method for accurately measuring the softening point of rosin by using a temperature-programmed headspace gas chromatography. Background technique

[0002] Rosin is a substance mainly separated from the secretions of pine trees. It is a very important chemical raw material, which is widely used in paints, coatings, adhesives, papermaking, rubber and other fields. The softening point of rosin is a key factor to measure whether the material can be used to produce products that meet the corresponding requirements and quality. The lower the softening point, the poorer the quality of the product. Therefore, a simple and accurate analytical method for determining the softening point of rosin is of great significance for the quality control of rosin products and the reduction of production costs.

[0003] At present, the main method for determining the softening ...

Claims

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