A two-way transfer method for infrared spectrum correction model of asphalt wax content

A technology of infrared spectroscopy and calibration models, which is applied in the field of two-way transmission of infrared spectroscopy models, can solve problems such as unusable and large prediction deviations

Active Publication Date: 2019-04-26
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a transfer method of the infrared spectrum model of asphalt wax content, to solve the problem that the asphalt wax content model established on a spectroscopic instrument will have a large prediction deviation or even be unusable when applied to other instruments question

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  • A two-way transfer method for infrared spectrum correction model of asphalt wax content
  • A two-way transfer method for infrared spectrum correction model of asphalt wax content
  • A two-way transfer method for infrared spectrum correction model of asphalt wax content

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Embodiment 1

[0049] Establish a two-way transfer method for the infrared spectrum correction model of asphalt wax content.

[0050] In this implementation case, the asphalt comes from 162 base asphalt samples from various provinces and cities in China. The base asphalt samples are black solid at room temperature and can be melted when heated. It is measured by "Test Method for Asphalt Wax Content" (SH / T0425-2003). Asphalt wax content data. The wax content of bitumen ranges from 1.50% to 2.64%.

[0051] Bitumen infrared spectra were collected with two Agilent 5500FTIR spectrometers (wavelength range 650 to 4000 cm-1) equipped with ATR accessories. The measurement method is:

[0052] 1) Turn on the Fourier transform infrared spectrometer to preheat for 1 hour, and set the spectrum acquisition parameters according to the relevant procedures: the resolution is 4cm-1, and the number of scans is 32 times.

[0053] 2) Take about 0.5 grams of sample and smear it on the surface of the ATR access...

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Abstract

The invention relates to a two-way transfer method of a spectrum correction model for wax content in asphalt, which is an SA-PDS method, aiming at providing a method for transferring an infrared spectrum model used for the wax content in the asphalt. The method is used to solve the problem that an asphalt wax content model established on an optical spectrum instrument has larger prediction deviations or even cannot be used when being applied to other instruments. The method mainly comprises the four steps of sample and spectrum collection, model transfer, evaluation and prediction; the SA-PDS method uses included angles between spectra to find optimal PDS parameters. Compared with the traditional model transfer method, the two-way transfer method has the advantages that 1, the influence of a property value on the model transfer is reduced in a model transfer process; 2, the model can be transferred along two directions, so that the method has a great significance for the on-line analysis of the spectra.

Description

technical field [0001] The invention relates to a two-way transfer method of a spectrum correction model for asphalt wax content, specifically, a two-way transfer method for an infrared spectrum model for determining wax content in asphalt. Background technique [0002] With the development of high-grade highways in our country, the market demand for road asphalt increases. In order to further improve the quality of road asphalt, China Petrochemical Corporation released the trial standard for high-grade road asphalt (Q / SHR004-1998) at the end of 1998, in which the experimental method used for asphalt wax content is cracking method (SH / T 0425) . However, this experimental method is complex, time-consuming, and has poor precision, and the solvent used will cause some pollution to the environment. [0003] In the article "Rapid Determination of Asphalt Wax Content by Near-infrared Analysis Method" (Acta Petroleum Sinica (Petroleum Processing), 2001, 17(3), 68-72), Wang Yanbin...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01N21/3563G01N21/3577G01N21/3504
CPCG01N21/3504G01N21/3563G01N21/3577
Inventor袁洪福曹玉婷宋春风赵众
OwnerBEIJING UNIV OF CHEM TECH