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A Method for Directly Determining the Components of Multicomponent Systems Using Raman Spectroscopy

A Raman spectroscopy and system technology, applied in Raman scattering, material analysis by optical means, material analysis, etc., can solve problems such as low accuracy, cumbersome operation, affecting the authenticity of data, etc., to achieve high accuracy, guarantee Authentic, easy-to-use effects

Active Publication Date: 2019-03-29
OPTOTRACE SUZHOU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for directly determining the components of a multi-component system by using Raman spectroscopy, so as to solve the above-mentioned deficiencies in the prior art, such as cumbersome operation, low accuracy, and affecting data authenticity

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  • A Method for Directly Determining the Components of Multicomponent Systems Using Raman Spectroscopy
  • A Method for Directly Determining the Components of Multicomponent Systems Using Raman Spectroscopy
  • A Method for Directly Determining the Components of Multicomponent Systems Using Raman Spectroscopy

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Embodiment 1

[0036] The present embodiment 1 illustrates the method proposed by the present invention through the process of determining the volume percentage of a component cyclohexane in a cyclohexane-n-hexane-ethanol ternary liquid phase system.

[0037] A method for directly determining the components of a multicomponent system using Raman spectroscopy, wherein the multicomponent system is a ternary liquid phase system of cyclohexane-n-hexane-ethanol, and the component to be quantified is cyclohexane. The method comprises the following steps:

[0038] ①In a volumetric flask, prepare a series of homogeneous solutions N of a ternary liquid phase system of cyclohexane-n-hexane-ethanol with known content: according to the volume percentage of component A cyclohexane to be quantified in the range of 0-100% The homogeneous solution N of 6 samples was prepared internally (8.0%, 16.0%, 30.0%, 50.0%, 70.0%, 90.0%), and the remaining component B n-hexane and component C ethanol were composed in a...

Embodiment 2

[0049] The second embodiment illustrates the method proposed by the present invention by determining the mass percentage of a component n-hexane in a cyclohexane-n-hexane-ethanol ternary liquid phase system.

[0050] A method for directly determining the components of a multicomponent system using Raman spectroscopy, wherein the multicomponent system is a ternary liquid phase system of cyclohexane-n-hexane-ethanol, and the component to be quantified is n-hexane. The method comprises the following steps:

[0051] ①In a volumetric flask, prepare a series of homogeneous solutions N of a ternary liquid phase system of cyclohexane-n-hexane-ethanol with a known content: according to the volume percentage of component B n-hexane to be quantified in the range of 0-100% (8.0%, 16.0%, 30.0%, 50.0%, 70.0%, 90.0%) prepared homogeneous solution N of 6 samples, and the remaining component A cyclohexane and component C ethanol were composed in a random ratio; The homogeneous solution M of th...

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Abstract

The invention discloses a method for directly determining components in a multicomponent system adopting a raman spectrum, and relates to a measuring method of the components in the multicomponent system. The method comprises the steps that 1, the raman spectrums is measured, wherein the raman spectrum of a pure solution of each component in the multicomponent system to be tested and the raman spectrum of a homogeneous solution M of the unknown-content multicomponent system to be tested are respectively measured; 2, each raman spectrum is converted to an integral spectrum through a computer, wherein the integral spectrum of the component to be quantified is recorded as SI, the matrix formed by the integral spectrums of the other components is recorded as SJ, and the integral spectrum of the homogeneous solution M is recorded as SPI; 3, the vector quantity-space included angle theta between SI and SJ is calculated, and the vector quantity-space included angle beta between SPI and SJ is also calculated; 4, the content of the component to be quantified in the homogeneous solution M is obtained through calculating the ratio of beta and theta. According to the method, direct measurement of each phase in the multicomponent system can be realized conveniently, the operation is simple and the data is real, moreover, the method can be used for the phase equilibrium study on a liquid-liquid multicomponent system and process condition control of a series of separation unit operations such as extraction and rectification.

Description

technical field [0001] The invention relates to a method for measuring the components of a multi-component system, in particular to a method for directly determining the components of a multi-component system by using Raman spectroscopy. Background technique [0002] In the multi-component liquid phase system, the content determination of the components in each phase at phase equilibrium is a common and important task in the teaching and research of chemistry and chemical engineering, such as the drawing of the multi-component equilibrium phase diagram, the selection of extraction process conditions, etc. At present, the existing methods either use chromatographic analysis after sampling, or use the relationship between refractive index and material composition, or use system turbidity changes for characterization. These methods have disadvantages such as cumbersome operation or low accuracy; in addition, due to the sensitivity of phase equilibrium , Sampling and other conta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
CPCG01N21/65G01N2021/653
Inventor 姚志湘粟晖姚桔
Owner OPTOTRACE SUZHOU TECH
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