The Raman spectra of liquid solutions

1939 ◽  
Vol 9 (2) ◽  
pp. 105-108 ◽  
Author(s):  
A. E. Brodskii ◽  
A. M. Sack ◽  
L. V. Kortchagin
Keyword(s):  
Raman Spectra ◽  
Liquid Solutions

Binary theory of dephasing in liquid solutions. II. Motion-transformed isotropic Raman spectra

1983 ◽  
Vol 76 (2) ◽  
pp. 163-174 ◽  
Author(s):  
A.A. Kipriyanov ◽  
A.B. Doktorov ◽  
A.I. Burshtein
Keyword(s):  
Raman Spectra ◽  
Liquid Solutions

Quantitative Detection of Ethanol/Acetone in Complex Solutions Using Raman Spectroscopy Based on Headspace Gas Analysis

2017 ◽  
Vol 72 (2) ◽  
pp. 280-287 ◽  
Author(s):  
Yubin Zhao ◽  
Yoshinori Yamaguchi ◽  
Chenchen Liu ◽  
Shinichi Sekine ◽  
Xiaoming Dou
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectra ◽  
Liquid Solution ◽  
Alcohol Concentration ◽  
Gas Analysis ◽  
Quantitative Detection ◽  
Volatile Components ◽  
Liquid Solutions ◽  
Headspace Gas ◽  
Complex Solutions

This paper demonstrated the quantitative detection of ethanol and acetone mixtures in complex solutions with Raman spectroscopy based on headspace gas analysis. By analyzing the volatile components in the headspace, their concentrations in liquid solutions were determined. We constructed our own Raman spectroscopy system to detect the headspace gas quantitatively over a solution in a sealed vial. The Raman spectra of the headspace gases over standard solutions were standardized for finding the concentrations of ethanol, acetone, and ethanol–acetone in mixture solutions. The results showed that the concentration of a gaseous component in the headspace gas was proportional to its ratio in the liquid solution. We obtained a linear relationship between the spectral intensity of volatile components in headspace and the concentration of the liquid solutions. Then, we analyzed the alcohol concentration in a white wine and a Chinese liquor called Fen Chiew by measuring the Raman spectra of the headspace gas over their liquids. For the river water sample, we also implemented our headspace gas detection with Raman spectra to obtain the concentration of acetone in the river sample. This work demonstrated the facilitation of headspace gas analysis by the qualitative and quantitative determination of volatile substances from liquid samples using Raman spectroscopy.

Single Crystal Raman Spectra of the Phase Transition in KTCNQ

1982 ◽  
Vol 85 (1) ◽  
pp. 297-303 ◽  
Author(s):  
A. D. Bandrauk ◽  
K. D. Truong ◽  
S. Jandl
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Raman Spectra

What are the ranges and basis of auxeticity in the phases of cellulose microfibrils?

2017 ◽  
Author(s):  
Akwasi Asamoah
Keyword(s):  
Bacterial Cellulose ◽  
Raman Spectra ◽  
Laser Power ◽  
Microfibrillated Cellulose ◽  
Glass Slide ◽  
Flax Fibre ◽  
Cellulose Microfibrils

<p>One sample of 1D bundle of cellulose microfibrils in the form of lignified flax fibre (0.10526 mm x 10 mm), and one 2D networks of cellulose microfibrils in the form of tunicate cellulose (0.07 mm x 5 mm x 10 mm), bacterial cellulose (0.135 mm x 5 mm x 10 mm) and microfibrillated cellulose (0.08 mm x 5 mm x 10 mm) were put on a glass slide parallel to the principal spectrometer axis. Raman spectra were measured all round in-plane under both half (in 5° steps) polarisation from 0° to 360° in extended mode between 100 cm<sup>-1</sup> and 1150 cm<sup>-1</sup> in 3 accumulations at 10s exposure and 100% laser power. The cursor was placed at the peak of the 1095 cm<sup>-1</sup> band, and intensity read.</p>

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