Equivalence of packed and capillary GC columns for detection of foreign fat in butter by use of the triglyceride formula method

2000 ◽  
Vol 52 (11-12) ◽  
pp. 791-797 ◽  
Author(s):  
J. Molkentin ◽  
D. Precht
Keyword(s):  
Capillary Gc ◽  
Formula Method ◽  
Foreign Fat

Presence of Phenolic Compounds in Sewage, Effluent and Sludge from Municipal Sewage Treatment Plants

1982 ◽  
Vol 14 (4-5) ◽  
pp. 143-150 ◽  
Author(s):  
F B DeWalle ◽  
D A Kalman ◽  
R Dills ◽  
D Norman ◽  
E S K Chian ◽  
...  
Keyword(s):  
Sewage Treatment ◽  
Municipal Sewage ◽  
Sewage Effluent ◽  
Capillary Gc ◽  
Digested Sludge ◽  
Calculated Concentration ◽  
Sewage Treatment Plants ◽  
Anaerobically Digested Sludge ◽  
Final Effluent ◽  
Dimethyl Phenol

A total of 25 municipal sewage treatment plants were sampled, 10 of which were resampled, to determine the quantity of phenolics in the sewage, final effluent and the anaerobically digested sludge using capillary GC/MS/DS/techniques. The study noted in decreasing order of frequency in raw sewage: phenol, pentachloro-phenol, dimethyl phenol, 3-methyl, 4-chlorophenol, 2,4,6-trichloro-phenol, 2,4-dichlorophenol, 2-nitrophenol, 2-chlorophenol, 2,4-dinitro-6-methylphenol and 2,4-dinitrophenol. The maximum concentration of phenol in sewage and sludge was 2800 ppb and 4460 respectively, while similar values for pentachlorophenol were 58 and 1200 ppb. Statistically calculated concentration reductions for phenol and dimethyl phenol were generally greater than noted for tri- and pentachlorophenol. Low decreases or increases were noted for monochlorophenol and especially for dichlorophenol as a result of the chloronation of the final effluent.

Screening and quantification of hypnotic sedatives in serum by capillary gas chromatography with a nitrogen-phosphorus detector, and confirmation by capillary gas chromatography-mass spectrometry.

1986 ◽  
Vol 32 (2) ◽  
pp. 325-328 ◽  
Author(s):  
V A Soo ◽  
R J Bergert ◽  
D G Deutsch
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Detector Response ◽  
Capillary Gc ◽  
Chromatography Mass Spectrometry ◽  
Nitrogen Phosphorus Detector ◽  
Sedative Drugs ◽  
Nitrogen Phosphorus

Abstract We describe a quantitative screen for hypnotic-sedative drugs in which we use capillary gas chromatography with a nitrogen-phosphorus detector (GC/NPD) as the primary method and capillary gas chromatography-mass spectrometry (GC-MS) for confirmation. GC retention times of the acid-extracted underivatized drugs were stable (CVs less than 1%), and the detector response varied linearly over a 20-fold concentration range with a mean correlation coefficient for 11 drugs of 0.989. The limits of detection were satisfactory (0.5 mg/L in a 0.5-mL serum sample and 1-microL injection volume), as were precision (average CV 5.2% within day, 6.4% between day). The complementary use of capillary GC-MS not only unambiguously confirms presumptive peaks identified by GC, but also prevents reports of false positives and identifies compounds not included in the quantitative GC screen that may be listed in the GC-MS library.

Alkaloids of Adenocarpus hispanicus (Lam.) DC Varieties

1992 ◽  
Vol 47 (5-6) ◽  
pp. 341-345 ◽  
Author(s):  
Gerhard Veen ◽  
Roland Greinwald ◽  
Paloma Cantó ◽  
Ludger Witte ◽  
F.-C. Czygan
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Quinolizidine Alkaloids ◽  
Capillary Gc ◽  
Main Compound ◽  
Total Absence ◽  
Alkaloid Extracts ◽  
Sensitive Method

Alkaloid extracts from different organs of Adenocarpus hispanicus ssp. hispanicus and Adenocarpus hispanicus ssp. gredensis were analyzed by capillary GC. Twenty-four compounds could be identified by the high sensitive method of GLC-MS: the pyrrolizidine alkaloids decorticasine, N-acetylnorloline and N-butyrylnorloline, the bipiperidyl alkaloid ammodendrine, the phenylethylamine tyramine and 19 quinolizidine alkaloids. In contrast to Adenocarpus complicatus, Adenocarpus foliolosus and Adenocarpus viscosus the alkaloid pattern of Adenocarpus hispanicus is characterized by the occurrence of quinolizidine alkaloids with sparteine predominating in the leaves and numerous dehydroderivatives of sparteine. Remarkable is the total absence of adenocarpine which was described as a main compound of the three former species. Our results strongly support the opinion that the genus Adenocarpus should be divided into two phytochemical groups.

Fundamental Considerations of Packed-Capillary GC, SFC, and LC Using Nonporous Silica Particles

1997 ◽  
Vol 69 (4) ◽  
pp. 628-635 ◽  
Author(s):  
Yufeng Shen ◽  
Ying J. Yang ◽  
Milton L. Lee
Keyword(s):  
Silica Particles ◽  
Capillary Gc

scholarly journals Development of large volume injection method for capillary GC.

1993 ◽  
Vol 42 (10) ◽  
pp. 573-579 ◽  
Author(s):  
Haruhiko TAJIMA ◽  
Naomi SHIMAMURA ◽  
Minako AOKI
Keyword(s):  
Large Volume ◽  
Capillary Gc ◽  
Large Volume Injection ◽  
Injection Method

Capillary GC-ECD and ECNI GCMS characterization of toxaphene residues in primate tissues during a feeding study

Chemosphere ◽  
1996 ◽  
Vol 32 (6) ◽  
pp. 1043-1053 ◽  
Author(s):  
P. Andrews ◽  
K. Headrick ◽  
J.-C. Pilon ◽  
F. Bryce ◽  
F. Iverson
Keyword(s):  
Capillary Gc ◽  
Feeding Study

Three Nematogen Azobenzene-Based Stationary Phases for Capillary GC: Synthesis and Comparative Study

2014 ◽  
Vol 77 (19-20) ◽  
pp. 1367-1377 ◽  
Author(s):  
Azzedine Addoun ◽  
Ouassila Ferroukhi ◽  
Mohamed Dahmane ◽  
Saliha Guermouche ◽  
Jean Pierre Bayle ◽  
...  
Keyword(s):  
Comparative Study ◽  
Stationary Phases ◽  
Capillary Gc
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