Determination of hydrogen in metals by a combination of the so-called carrier gas method and the technique of frontal chromatography

1975 ◽  
Vol 47 (1) ◽  
pp. 159-161 ◽  
Author(s):  
Vlastimil. Rezl ◽  
Bozena. Kaplanova ◽  
Jaroslav. Janak
Keyword(s):  
Carrier Gas ◽  
Hydrogen In Metals ◽  
Frontal Chromatography

Gas Chromatographic Determination of Residues of Organophosphorus Pesticides with a Modified Flame Ionization Detector

1967 ◽  
Vol 50 (3) ◽  
pp. 601-604
Author(s):  
Joseph H Ford ◽  
Morton Beroza
Keyword(s):  
Potassium Chloride ◽  
Organophosphorus Pesticides ◽  
Chromatographic Determination ◽  
Ionization Detector ◽  
Carrier Gas ◽  
Flame Ionization ◽  
Phosphorus Containing ◽  
Carrier Gases ◽  
Chloride Coating

Abstract The effect of various salt coatings, metals, and carrier gases was investigated in an attempt to improve the Giuffrida thermionic detector for residues of phosphorus-containing pesticides. As reported recently hy Giuffrida et al., the highest sensitivity to phosphorus (with insignificant response to halogen) was obtained with a potassium chloride coating. The use of helium as the carrier gas produced an 8-fold enhancement in response to phosphorus over that obtained with nitrogen, and the response to halogen remained nil. Substrate interference was very low with the KCI detector and helium carrier gas, and analyses were possible at the subnanogram level

Determination of CO2 in Wines by Gas Chromatography

1964 ◽  
Vol 47 (4) ◽  
pp. 730-734
Author(s):  
Howard L Ashmead ◽  
Glenn E Martin ◽  
John A Schmit
Keyword(s):  
Gas Chromatography ◽  
Direct Method ◽  
Alcoholic Beverages ◽  
Gas Chromatograph ◽  
Injection Port ◽  
Carrier Gas ◽  
Solid Adsorbent ◽  
Partial Pressures ◽  
Injection Port Temperature

Abstract A fast and direct method is presented for the determination of CO2 in wines. Partial pressures from other ingredients of alcoholic beverages do not interfere. The method was compared to the manometric procedure under vacuum. An F & M Model 450 Gas Chromatograph with a filament detector was used for C02 determinations. Components were separated by a column 9” long and 1/8” o.d. using charcoal (60—80 mesh) as solid adsorbent. Injection port temperature was ambient; detector and column temperatures were 40°C. Helium was used as a carrier gas at the rate of 50 ml/min. Approximately 50 μ1 samples of standard and unknown solutions were used for the respective determinations.

Experimental methods for measurement of bond dissociation energies and heats of formation of radicals

1951 ◽  
Vol 207 (1088) ◽  
pp. 5-13 ◽  
Keyword(s):  
Experimental Methods ◽  
Experimental Results ◽  
Heats Of Formation ◽  
Bond Dissociation Energies ◽  
Carrier Gas ◽  
Bond Dissociation ◽  
Dissociation Energies ◽  
Kinetics Of

The paper describes a pyrolytic method of investigating the kinetics of gaseous reactions in which toluene is used as a carrier gas. It is shown that the method is particularly suitable for the determination of bond dissociation energies. The scope of the method is illustrated by various examples. A list of bond dissociation energies obtained is given. The manner in which the experimental results obtained can be cross-checked, is indicated and illustrated by examples. The effects of various constitutional factors on the bond dissociation energies are discussed.

Parallelized N2O Frontal Chromatography for the Fast Determination of Copper Surface Areas

2008 ◽  
Vol 10 (3) ◽  
pp. 387-390 ◽  
Author(s):  
Stefan Olejnik ◽  
Christian Baltes ◽  
Martin Muhler ◽  
Ferdi Schüth
Keyword(s):  
Copper Surface ◽  
Fast Determination ◽  
Surface Areas ◽  
Determination Of Copper ◽  
Frontal Chromatography
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