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Raman spectrum method for rapidly testing moisture content in triethylene glycol

A technology of Raman spectroscopy and Raman spectrometer, applied in the field of detection of moisture content in triethylene glycol, can solve problems such as complicated operation steps, high cost of instrument consumables, and poor application

Inactive Publication Date: 2013-12-11
CHINESE ACAD OF INSPECTION & QUARANTINE
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Problems solved by technology

At present, the general method for detecting the water content in triethylene glycol is gas chromatography. Although this method can perform accurate quantitative analysis, it can only be detected in the laboratory, and the chromatograph has strict requirements on the experimental conditions. The operation steps are complicated, the cost of instrument consumables is high, and there is a high requirement for the sample volume. In actual production and life, this method cannot be well applied.

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  • Raman spectrum method for rapidly testing moisture content in triethylene glycol
  • Raman spectrum method for rapidly testing moisture content in triethylene glycol
  • Raman spectrum method for rapidly testing moisture content in triethylene glycol

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Embodiment 1

[0015] Embodiment 1 Utilizes the Raman spectroscopic method of the moisture content in the rapid detection triethylene glycol of the present invention, comprises the following specific steps:

[0016] 1. Sample preparation: dilute the triethylene glycol standard product with double distilled water or deionized water, and prepare triethylene glycol solutions with different moisture contents. The specific moisture content is 10%, 15%, 85%, and 95% triethylene glycol Alcoholic solution, to be tested;

[0017] 2. Adjustment parameters: A portable Raman spectrometer developed by the Chinese Academy of Inspection and Quarantine is used. The laser source of the Raman spectrometer emits a near-infrared laser with a wavelength of 785nm, and the spectral scanning parameters are adjusted. The laser energy parameter is selected as 300mw, and the integration parameter is selected as 1s;

[0018] 3. Measure the Raman spectrum: measure the Raman spectrum of each sample, scan the Raman spectr...

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Abstract

The invention provides a Raman spectrum method for rapidly testing moisture content in triethylene glycol. The method comprises the following steps of: acquiring Raman spectrums of triethylene glycol within 120cm<-1> to 1000cm<-1> by utilizing a Raman spectrum technique, making a standard curve of the moisture content in triethylene glycol according to Raman spectrum intensity corresponding to a characteristic wave of triethylene glycol at 886cm<-1> to obtain a regression equation, and carrying out the test on the moisture content in triethylene glycol according to the regression equation. The method is rapid, simple and convenient to operate, small in sample consumption and applicable to on-site test.

Description

technical field [0001] The invention relates to a method for detecting the moisture content in triethylene glycol, in particular to a method for rapidly detecting the moisture content in triethylene glycol by using Raman spectroscopy. Background technique [0002] Triethylene glycol is a viscous liquid with strong hygroscopicity, so it is used as a new type of desiccant and dehydrating agent for oil and gas products. The dehydration technology of triethylene glycol is to use the strong water absorption of triethylene glycol to absorb the moisture in natural gas or syngas under high pressure and normal temperature, and to dehydrate the water from the solvent under the condition of depressurization and temperature rise. Alcohol is regenerated. Because this technology is friendly to the environment, has high absorption efficiency, and triethylene glycol can be recycled repeatedly, it has more and more applications in many large domestic oil and gas companies and chemical compa...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N1/38
Inventor 邹明强张孝芳乔树亮齐小花刘峰刘彩虹
Owner CHINESE ACAD OF INSPECTION & QUARANTINE
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