An Isothermal Gas Chromatographic Method for the Simultaneous Estimation of Oxygen, Nitrous Oxide, and Carbon Dioxide Content of Gases in the Soil

1981 ◽  
Vol 19 (2) ◽  
pp. 107-111 ◽  
Author(s):  
K. C. Hall ◽  
R. J. Dowdell
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Chromatographic Method ◽  
Simultaneous Estimation ◽  
Carbon Dioxide Content ◽  
Oxygen Nitrous Oxide ◽  
Gas Chromatographic Method ◽  
Isothermal Gas

scholarly journals The Use of Cryogenic Temperature Gas Chromatography for the Determination of Carbon Monoxide and Carbon Dioxide in Cigarette Smoke

1972 ◽  
Vol 6 (4) ◽  
Author(s):  
G.P. Morie ◽  
C.H. Sloan
Keyword(s):  
Carbon Dioxide ◽  
Gas Chromatography ◽  
Carbon Monoxide ◽  
Liquid Nitrogen ◽  
Cigarette Smoke ◽  
Cryogenic Temperature ◽  
Chromatographic Method ◽  
Porapak Q ◽  
Gas Chromatographic Method

AbstractA gas chromatographic method for the determination of carbon monoxide and carbon dioxide in cigarette smoke was developed. A column containing Porapak Q packing and a cryogenic temperature programmer which employed liquid nitrogen to cool the column to subambient temperatures was used. The separation of N

Qualitative and Quantitative Determination of Methaqualone in Serum by Gas Chromatography

1974 ◽  
Vol 20 (2) ◽  
pp. 249-254 ◽  
Author(s):  
M A Evenson ◽  
G L Lensmeyer
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Chromatographic Method ◽  
Internal Standard ◽  
Serum Concentrations ◽  
Single Extraction ◽  
Qualitative And Quantitative ◽  
Gas Chromatographic Method ◽  
Isothermal Gas

Abstract A rapid, simple, accurate, and precise isothermal gas-chromatographic method is introduced for determination of methaqualone (2-methyl-3-o-tolyl-4(3H)-quinazolinone) in serum. A single extraction of 2 ml of serum, without derivative formation, will give adequate sensitivity for quantitation of therapeutic serum concentrations of the drug within 15 min. The method is free of interferences from biological substances, as well as from commonly used drugs. A non-drug internal standard compensates for variables in extraction, injection, and instrumental changes during analysis. The coefficient of variation, day-to-day, is 5.6%. Mean recovery of added methaqualone was 80%. To compensate for the nonquantitative yield and ensure accurate results, we prepared all analytical methaqualone standards in serum.

An improved back-flush-to-vent gas chromatographic method for determination of trace permanent gases and carbon dioxide in ultra-high purity ammonia

2016 ◽  
Vol 1447 ◽  
pp. 129-134 ◽  
Author(s):  
Maxim M. Trubyanov ◽  
Georgy M. Mochalov ◽  
Ilya V. Vorotyntsev ◽  
Andrey V. Vorotyntsev ◽  
Sergey S. Suvorov ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Purity ◽  
Chromatographic Method ◽  
Ultra High Purity ◽  
Gas Chromatographic Method ◽  
Permanent Gases

scholarly journals Gas Chromatographic Determination of Alachlor in Microencapsulated Formulations: Mini-Collaborative Study

1987 ◽  
Vol 70 (6) ◽  
pp. 1056-1058
Author(s):  
David F Tomkins
Keyword(s):  
Coefficient Of Variation ◽  
Chromatographic Method ◽  
Collaborative Study ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Chromatographic Column ◽  
Data Points ◽  
Gas Chromatographic Method ◽  
Isothermal Gas

Abstract An isothermal gas chromatographic method for measuring alachlor in Micro-Tech® (microencapsulated) formulations was tested by 5 collaborators. The samples were prepared in acetone, and alachlor was determined using a gas chromatographic column of 10% SP- 2250 on 100-120 mesh Supelcoport. Di-n-pentylphthalate was used as the internal standard. Collaborators made single determinations on 5 samples distributed as blind duplicates. The mini-collaborative study generated 47 data points. The coefficient of variation (CV„- pooled) was 1.35%, and CVx-pooled was 0.73%. The method was simple to use and did not reveal any interferences in samples tested. The method has been adopted official first action as an AOACCIPAC method.

A Gas-Chromatographic Micromethod for Respiration Studies on Insects

1971 ◽  
Vol 54 (2) ◽  
pp. 437-441
Author(s):  
U. TADMOR ◽  
S. W. APPLEBAUM ◽  
R. KAFIR
Keyword(s):  
Carbon Dioxide ◽  
Thermal Conductivity ◽  
Oxygen Consumption ◽  
Molecular Sieve ◽  
Chromatographic Method ◽  
Porapak Q ◽  
Chilocorus Bipustulatus ◽  
Initial Separation ◽  
Carbon Dioxide Release ◽  
Gas Chromatographic Method

1. A gas-chromatographic method adapted for measuring both oxygen consumption and carbon dioxide release of individual insects is described. 2. The method is based on initial separation of air from CO2 on Porapak Q, and infsequent separation of oxygen from nitrogen on molecular sieve 5A. 3. 1-2µl. of O2 or CO2 are easily measured with the thermal conductivity apparatus used. 4. Representative respiratory values of field-collected and laboratory-reared adult Chilocorus bipustulatus beetles are presented in order to show the capability of the method.

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