Testing method of content of rubber in dandelion rubber grass

Abstract

The invention provides a testing method of content of rubber in dandelion rubber grass, comprising the following steps: preparing a sample of a standard substance of dandelion rubber, making a standard curve, testing the sample to be tested, and calculating the rubber content. First the standard substance of the dandelion rubber is prepared and a calibration substance after splitting is determined, a pyrolysis temperature of a pyrolysis instrument and a programmed temperature of a gas chromatograph are set, and the standard substance is put into a pyrolysis gas chromatography-mass spectrometerfor sample testing, after the sample is tested, a chromatogram is obtained, and the standard curve is made by using the peak area of the calibration substance; and then the actual sample to be testedis put into a pyrolysis gas chromatograph for measurement, and the peak area of the calibration substance of the actual sample is substituted into the standard curve to acquire the rubber content ofthe actual sample. The testing method provided by the invention has good repeatability and high accuracy, and can be used for rubber content detection of the dandelion rubber grass.

Description

technical field [0001] The invention belongs to the field of testing and analysis, and in particular relates to a testing method for rubber content, in particular to a testing method for rubber content in dandelion rubber grass. Background technique [0002] The methods for checking the rubber content in the rubber grass are: Soxhlet extraction (differential gravimetric method), infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), gel permeation chromatography (GPC), nuclear magnetic resonance ( NMR) and other methods. However, they require a large amount of samples, complicated sample pretreatment, and consume a lot of organic reagents, which are extremely environmentally unfriendly. , Convenient identification needs. [0003] Existing technologies such as differential gravimetric method need to consume a large amount of organic reagents, the sample pretreatment is complicated, the experiment period is long, and the test results have large errors and instabili...

AI Technical Summary

Problems solved by technology

However, they require a large amount of samples, complicated sample pretreatment, and consume a lot of organic reagents, which are extremely environmentally unfriendly. , convenient identification needs

[0003] Existing technologies such as differential gravimetric method need to consume a large amount of organic reagents, the sample pretreatment is complicated, the experiment period is long, and the test results have large errors and instability; infrared spectroscopy requires a large amount of sample data for modeling, which is time-consuming At the same time, the data in the modeling process is also extremely unstable; both thermogravimetric analysis and gel permeation chromatography require sample pretreatment, and the experiment period is long, so it is impossible to achieve high-throughput rapid detection and stable output. batch data

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