Nuclear magnetic resonance space resolved spectrum method used for realizing real-time monitoring on emulsion phase separation process

A nuclear magnetic resonance spectrometer and real-time monitoring technology, applied in the field of nuclear magnetic resonance spectroscopy detection, to achieve the effect of short sampling time

Active Publication Date: 2017-07-21
XIAMEN UNIV
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Problems solved by technology

However, most liquid NMR spectrometers are equipped with trans or broadband probes that only have a gradient field along the z-axis for selecting coherent paths and measuring self-diffusion coefficients

Method used

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  • Nuclear magnetic resonance space resolved spectrum method used for realizing real-time monitoring on emulsion phase separation process
  • Nuclear magnetic resonance space resolved spectrum method used for realizing real-time monitoring on emulsion phase separation process
  • Nuclear magnetic resonance space resolved spectrum method used for realizing real-time monitoring on emulsion phase separation process

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Embodiment 1

[0034] This embodiment is suitable for monitoring the process from the formation of the emulsion of the oil-water system to the stratification and stability of the oil, water and emulsified layer by using the fast nuclear magnetic resonance spatial resolution method, and detecting the change of substances in this process:

[0035] (1) The sesame oil used in this experiment was purchased from a local supermarket and used directly without any pretreatment. Poloxamer 188 and acetone (99.5% purity) were purchased from a local chemical product retailer (Jilin GmbH, Xiamen, China) and used without further purification. D. 2 O (99.8%) is a product of Norell (USA). D. 2 O and distilled water to prepare the emulsion. 200 μl D 2 O and 1800 μL of distilled water were configured as the water phase, and Poloxamer 188 was dispersed in the water phase at a ratio of 0.35 g / L and vortexed at room temperature to ensure complete dissolution. Take 2000 μL of sesame oil, mix it with water, an...

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Abstract

The invention relates to a nuclear magnetic resonance space resolved spectrum method used for realizing real-time monitoring on emulsion phase separation process, and belongs to the field of nuclear magnetic resonance spectroscopy detection. The nuclear magnetic resonance space resolved spectrum method comprises following steps: water and oil are mixed at a volume ratio of 1:1, a certain amount of an emulsifier is added, and an obtained mixture is subjected to full vibrating mixing using a vortex vibrating device; the mixture is delivered into a nuclear magnetic tube, and a pre-compiled rapid space resolved NMR spectrum impulse sequence is input into a nuclear magnetic resonance spectrometer; setting of impulse sequence parameters and sampling parameters is carried out, and data acquisition is carried out; after sampling, related data post-processing is carried out, high resolution <1>H NMR spectrums of different space positions are extracted, integral computation of oil signal intensity in the high resolution <1>H NMR spectrums is carried out, and then sample stable layering time and emulsion layer thickness are obtained via analyzing the evolution laws of the single intensity on different space positions. According to the nuclear magnetic resonance space resolved spectrum method, the adopted impulse sequence is a rapid chemical shift imaging method based on local uniform; and high resolution one-dimensional (1D) <1>H NMR spectrums of nonuniform emulsion systems at different space positions can be obtained via the nuclear magnetic resonance space resolved spectrum method.

Description

technical field [0001] The invention relates to a nuclear magnetic resonance (Nuclear Magnetic Resonance, NMR) spectroscopy detection method, in particular to a nuclear magnetic resonance spatial resolution spectroscopy method for real-time monitoring of emulsion phase separation process. Background technique [0002] Emulsions are metastable colloids made of two immiscible liquids, one dispersed in the other in the presence of surfactants. O / W emulsions have been widely used in various fields, including food (Lobato-Calleros et al., 2008; Relkin, Shukat, Peyronel, & Meneau, 2014) and Pharmaceutical industry, etc. (Kabri, Arab-Tehrany, Belhaj, & Linder, 2011; Onuki, Kida, Funatani, Hayashi, & Takayama, & Zhong, 2015). Understanding the formation process of emulsions is of great significance for understanding the stability and phase separation process of emulsions. Traditional methods for studying the structure and dynamics of emulsions include light scattering (van Gruijth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/08
Inventor 崔晓红游梦婷韦芝良杨健陈忠
Owner XIAMEN UNIV
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