Ultrasonic Absorption in Carbon Disulphide

Nature ◽  
1951 ◽  
Vol 167 (4257) ◽  
pp. 898-899 ◽  
Author(s):  
JOHN LAMB ◽  
J. H. ANDREAE
Keyword(s):  
Carbon Disulphide ◽  
Ultrasonic Absorption

Ultrasonic Absorption in Castor Oil, Carbon Disulphide, Benzene and Xylene

Nature ◽  
1954 ◽  
Vol 174 (4438) ◽  
pp. 976-977 ◽  
Author(s):  
A. K. DUTTA ◽  
K. SAMAL
Keyword(s):  
Castor Oil ◽  
Carbon Disulphide ◽  
Ultrasonic Absorption

Ultrasonic measurements and the second viscosity of carbon disulphide

1954 ◽  
Vol 226 (1164) ◽  
pp. 51-51 ◽  
Keyword(s):  
Relaxation Time ◽  
Carbon Disulphide ◽  
Wave Length ◽  
Relaxation Times ◽  
Adiabatic Compressibility ◽  
Ultrasonic Waves ◽  
Appreciable Effect ◽  
Ultrasonic Absorption ◽  
Low Frequencies ◽  
Ultrasonic Measurements

In a previous paper (Andreae & Lamb 1951) the ultrasonic absorption in a liquid was deduced thermodynamically, starting from an expansion of the adiabatic compressibility. This procedure has been revised, using a more satisfactory expansion, and a general expression is derived for the absorption due to a single relaxing process. The relaxation time ז a of a mechanism A , giving rise to a dispersion of the ultrasonic waves in the neighbourhood of a frequency f a , is assumed to be much less than, or much greater than, the relaxation times of all other processes occurring within the liquid. It is then found that processes having a much smaller relaxation time than ז a may have an appreciable effect on calculations of the absorption per wave-length due to mechanism A . Experimental measurements are presented which delineate a dispersion in carbon disulphide centred around 75 Mc/s at 25° C and 31 Mc/s at -63° C. The dispersion is attributed to a relaxation of the total vibrational specified heat. The absence of any dispersion at low frequencies can be inferred from static com­pressibility data.

Ultrasonic Absorption in Carbon Disulphide

1952 ◽  
Vol 7 (5) ◽  
pp. 537-538 ◽  
Author(s):  
Tadashi Kishimoto ◽  
Otohiko Nomoto
Keyword(s):  
Carbon Disulphide ◽  
Ultrasonic Absorption

The Liquefaction of Oxygen and the Solidification of Carbon Disulphide and Alcohol

1883 ◽  
Vol 16 (416supp) ◽  
pp. 6641-6641
Author(s):  
S. V. Wroblewski ◽  
K Olszewski
Keyword(s):  
Carbon Disulphide

Flame ionization detector response to coeluting hydrocarbons and carbon disulphide and its application to the determination of the sum of C6-C11 alkanes and cycloalkanes in air

1983 ◽  
Vol 48 (3) ◽  
pp. 722-734
Author(s):  
Martin Koval
Keyword(s):  
Carbon Disulphide ◽  
Internal Standard ◽  
Calibration Procedure ◽  
Detector Response ◽  
Column Temperature ◽  
Flame Ionization ◽  
Other Substances ◽  
Flame Ionisation Detector ◽  
Ionisation Detector

The flame ionisation detector response to C6-C11 aliphatic hydrocarbon solutions in carbon disulphide in the concentration range between 1.3-9.5 mg ml-1 retained lineary despite the excess of solvent entering the detector simultaneously with the analyte. Pure carbon disulphide exhibited a small positive detector response which did not interfere in calibration procedure and which, under certain GC conditions, inverted to negative values. This response was not proportional to the injected volume and was strongly influenced by the column temperature and/or bleed. On the basis of these findings, a method compatible with the widely used charcoal tube carbon disulphide desorption procedure was developed and evaluated. It consists of static desorption of the sum of aliphatic alkanes and cycloalkanes from the activated charcoal after which an internal standard is added to the supernatant eluate. The resulting carbon disulphide solution is analysed on a highly polar stationary phase 1,2,3-tris(2-cyanoethoxy)propane where the solvent and the analyte coelute in a single peak, the height of which is practically proportional to the sum of alkanes and cycloalkanes present. This also makes determinations of other substances present in the sample more simple. The field test of the proposed method yielded values comparable in precision and accuracy with a control infrared spectrophotometric method.

Study on the precision of the activated charcoal solvent desorption procedure - Correlation of desorption efficiencies

1981 ◽  
Vol 46 (6) ◽  
pp. 1332-1347 ◽  
Author(s):  
Martin Koval
Keyword(s):  
Activated Charcoal ◽  
Carbon Disulphide ◽  
Internal Standard ◽  
Standard Addition ◽  
Published Data ◽  
Single Factor ◽  
Gas Chromatograph ◽  
Model Compounds ◽  
Single Factor Analysis ◽  
Acceptable Agreement

The described method uses activated charcoal sampling tubes for air sampling. Adsorbed compounds are eluted by the static desorption procedure with 1 ml of carbon disulphide, 0.5 ml of the supernatant is filtered off and, after internal standard addition, analysed on a gas chromatograph. Using synthetic calibration mixtures of model organic compounds with air, cumulative sampling and desorption efficiencies for 24 substances were determined for concentration ranges and sample volumes according to current Czechoslovak hygienic standards. Experimental results were treated with the single factor analysis of variance and the precision of the described procedure was estimated for the studied model compounds on the basis of residual sums of squares. Calculated values of cumulative sampling and desorption efficiencies and their precisions were compared with available published data and an acceptable agreement was found. In addition to that, cumulative sampling and desorption efficiencies were also found to be significantly correlated to molar volumes and other related molecular properties for some types of compounds.

Change of Dielectric Polarisation of Carbon Disulphide with Temperature

Nature ◽  
1931 ◽  
Vol 128 (3238) ◽  
pp. 871-872 ◽  
Author(s):  
M. WOLFKE ◽  
J. MAZUR
Keyword(s):  
Carbon Disulphide ◽  
Dielectric Polarisation
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