Determination of Methyl Chloride in Air

1946 ◽  
Vol 18 (5) ◽  
pp. 314-316 ◽  
Author(s):  
J.L. Franklin ◽  
E.L. Gunn ◽  
R.L. Martin
Keyword(s):  
Methyl Chloride

CATIONIC COPOLYMERIZATION OF ISOBUTYLENE WITH ISOPRENE: KINETICS OF THE PROCESS AND DETERMINATION OF KINETIC CONSTANTS

2015 ◽  
Vol 88 (4) ◽  
pp. 574-583 ◽  
Author(s):  
N. V. Ulitin ◽  
K. A. Tereshchenco ◽  
D. A. Shiyan ◽  
G. E. Zaikov
Keyword(s):  
Experimental Data ◽  
Molecular Weight ◽  
Cationic Polymerization ◽  
Methyl Chloride ◽  
Theoretical Description ◽  
Kinetic Constants ◽  
Molecular Weight Characteristics ◽  
Cationic Copolymerization ◽  
Kinetics Of

ABSTRACT A theoretical description has been developed of the kinetics of isobutylene with isoprene (IIR) cationic polymerization in the environment of methyl chloride on aluminum trichloride as the catalyst. Based on experimental data on the kinetics of copolymerization (isobutylene conversion curve) and the molecular weight characteristics of the copolymer of IIR, kinetic constants for the process were found. Adequacy of the developed theoretical description of the kinetics of the IIR copolymerization process was confirmed by comparing the experimental molecular-weight characteristics calculated by this description, independent characteristics, and IIR unsaturation.

Fast determination of methyl chloride and methyl bromide emissions from dried plant matter and soil samples using HS-SPME and GC-MS: method and first results

2009 ◽  
Vol 6 (4) ◽  
pp. 311 ◽  
Author(s):  
Noureddine Yassaa ◽  
Asher Wishkerman ◽  
Frank Keppler ◽  
Jonathan Williams
Keyword(s):  
Methyl Bromide ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Methyl Chloride ◽  
Field Studies ◽  
Soil Samples ◽  
Gas Chromatography Mass Spectrometry ◽  
Spme Fibre ◽  
Non Destructive

Environmental context. Headspace solid-phase microextraction (HS-SPME) and analysis by gas chromatography–mass spectrometry (GC/MS) system has been employed for quantifying the emissions of methyl chloride (CH3Cl) and methyl bromide (CH3Br) from plants and soils. Compared with more commonly used techniques, HS-SPME coupled to GC/MS is simple, fast, sensitive, economical and non-destructive, with potential for laboratory-based and field studies. Abstract. Headspace solid-phase microextraction (HS-SPME) and gas chromatography–mass spectrometry (GC/MS) system have been employed for quantifying the emissions of methyl chloride (CH3Cl) and methyl bromide (CH3Br) from plants and soils. Seven SPME fibre coatings including 75 μm Carboxen-polydimethylsiloxane (CAR-PDMS), 85 μm Carboxen-PDMS (CAR-PDMS), 50/30 μm divinylbenzene-CAR-PDMS (DVB-CAR-PDMS), 65 μm DVB-PDMS, 65 μm carbowax-DVB (CW-DVB), 30 μm PDMS (PDMS) and 100 μm PDMS, were tested by comparing their sampling efficiencies towards CH3Cl and CH3Br. Key parameters such as extraction time, desorption temperature and time were all optimised in this work. The optimum conditions were found with CAR-PDMS 75 μm as an SPME fibre coating, a 1-min sampling time, a 50°C incubation temperature and a 2-min desorption time and a 250°C desorption temperature. These conditions were used for the determination of CH3Cl and CH3Br emission rates from different plant species as well as soil samples. Compared with more commonly used techniques, HS-SPME coupled to GC/MS is simple, fast, sensitive, economical and non-destructive, with potential for laboratory-based and field studies.

The Determination of Methyl Chloride in Gas Mixtures.

1919 ◽  
Vol 11 (10) ◽  
pp. 943-946 ◽  
Author(s):  
V. C. Allison ◽  
M. H. Meighan
Keyword(s):  
Methyl Chloride ◽  
Gas Mixtures

Rapid Determination of Methyl Chloride in Ambient Air Samples by GC-MS

1976 ◽  
Vol 9 (11) ◽  
pp. 1015-1023 ◽  
Author(s):  
Dagmar Rais Cronn ◽  
David E. Harsch
Keyword(s):  
Rapid Determination ◽  
Methyl Chloride ◽  
Ambient Air ◽  
Air Samples

Determination of small amounts of methyl chloride in air

1932 ◽  
Vol 4 (3) ◽  
pp. 259-262 ◽  
Author(s):  
F. A. Patty ◽  
H. H. Schrenk ◽  
W. P. Yant
Keyword(s):  
Methyl Chloride

A method for determination of methyl chloride concentration in air trapped in ice cores

Chemosphere ◽  
2006 ◽  
Vol 63 (7) ◽  
pp. 1209-1213 ◽  
Author(s):  
Takuya Saito ◽  
Yoko Yokouchi ◽  
Shuji Aoki ◽  
Takakiyo Nakazawa ◽  
Yoshiyuki Fujii ◽  
...  
Keyword(s):  
Chloride Concentration ◽  
Ice Cores ◽  
Methyl Chloride

Determination of Dimethyl Ether in Methyl Chloride

1949 ◽  
Vol 21 (10) ◽  
pp. 1165-1168 ◽  
Author(s):  
E. B. Claiborne ◽  
M. C. Fuqua
Keyword(s):  
Dimethyl Ether ◽  
Methyl Chloride
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