Evaluation of a Gas Chromatographic Method to Identify Irradiated Chicken, Pork, and Beef by Detection of Volatile Hydrocarbons

1994 ◽  
Vol 77 (5) ◽  
pp. 1202-1217 ◽  
Author(s):  
Georg A Schreiber ◽  
Grit Schulzki ◽  
Almuth Spiegelberg ◽  
Norbert Helle ◽  
Klaus W Bögl
Keyword(s):  
Chromatographic Analysis ◽  
Chromatographic Method ◽  
Dose Range ◽  
Correct Identification ◽  
Volatile Hydrocarbons ◽  
Chicken Carcass ◽  
Irradiation Treatment ◽  
Radiation Induced ◽  
Fat Fraction ◽  
Gas Chromatographic Method

Abstract A method suitable for routine application was used in an interlaboratory study to detect irradiation treatment of chicken carcass, pork, and beef. By using gas chromatographic analysis, 17 participating laboratories determined the quantity of 4 different radiation-induced volatile hydrocarbons (tetradecene, pentadecane, hexadecadiene, and neptadecene) in the fat fraction of coded specimens approximately 3 and 6 months after irradiation. The specimens of each type of meat were supplied by 2 different producers. The dose range tested (0.6-7.5 kGy) included levels commercially used to reduce the number of contaminating microorganisms (1-5 kGy). The method employed permitted a correct identification of irradiated or nonirradiated in 98.3% of the 864 specimens.

Gas Chromatographic Determination of Dioxathion and Chlorfenvinphos in Emulsifiable Formulations and Livestock Dips

1970 ◽  
Vol 53 (3) ◽  
pp. 566-568
Author(s):  
J E Paterson
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Analysis ◽  
Chromatographic Method ◽  
Silicone Oil ◽  
Chromatographic Determination ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Coefficients Of Variation ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for the quantitative determination of dioxathion and chlorfenvinphos in emulsifiable concentrates and livestock dips. A convenient quantity of the emulsifiable formulation is dissolved in xylene and the aqueous dip is extracted with xylene for gas chromatographic analysis, using a mixed silicone oil stationary phase and a flame ionization detector. The coefficients of variation for the dioxathion and chlorfenvinphos determinations in the emulsifiable concentrate are 2.4 and 1.0%, respectively. Recoveries of the former from a fouled dip ranged from 97 to 103% and recoveries of the latter ranged from 92 to 97%.

Improved determination of phenobarbital, primidone, and phenytoin by use of a preparative instrument for extraction, followed by gas chromatography.

1979 ◽  
Vol 25 (8) ◽  
pp. 1373-1376 ◽  
Author(s):  
L M St Onge ◽  
E Dolar ◽  
M A Anglim ◽  
C J Least
Keyword(s):  
Chromatographic Analysis ◽  
Chromatographic Method ◽  
Solid Phase ◽  
Correlation Coefficients ◽  
Specific Method ◽  
Sensitive Detector ◽  
Gas Chromatograph ◽  
Solid Phase Extraction Cartridge ◽  
Gas Chromatographic Method

Abstract A microprocessor-controlled automatic extractor, (PREMTM I) is described with which lipophilic components may be extracted from physiological fluids by means of a selective, solid-phase extraction cartridge, and the extracts presented in dry form for subsequent analysis. This instrument has been successfully evaluated for the extraction of phenobarbital, primidone, and phenytoin from human serum before chromatographic analysis. We describe a specific method for determination of these anticonvulsants, involving the PREP I and analysis, after flash-heater methylation, in a gas chromatograph equipped with a nitrogen-sensitive detector. Absolute recoveries ranged from 90 to 102%. Within-day and day-to-day precision (CV) ranged from 4 to 7% for all three drugs in therapeutic concentrations. Comparison of this method with results obtained with a liquid--liquid micro-scale extraction and a similar gas-chromatographic method resulted in correlation coefficients of 0.988 (phenobarbital), 0.978 (primidone), and 0.982 (phenytoin). These drugs in therapeutic concentrations can be simultaneously extracted and measured with confidence.

Gas-chromatographic analysis for 1,2:5,6-dianhydrogalactitol, an anti-neoplastic agent, in plasma.

1976 ◽  
Vol 22 (10) ◽  
pp. 1639-1643 ◽  
Author(s):  
T Kimura ◽  
L A Sternson ◽  
T Higuchi
Keyword(s):  
Chromatographic Analysis ◽  
Room Temperature ◽  
Chromatographic Method ◽  
Antineoplastic Agent ◽  
Drug Distribution ◽  
Flame Ionization Detection ◽  
Flame Ionization ◽  
Monitoring Drug ◽  
Gas Chromatographic Method ◽  
Therapeutic Doses

Abstract We describe a gas chromatographic method for measuring submicrogram quantities of dianhydrogalactitol, a promising antineoplastic agent (currently undergoing clinical trials in humans), in plasma. The drug is first extracted from blood plasma by saturating the aqueous phase with solid potassium carbonate and extracting with isopropanol/chloroform (9/1 by vol). It is then converted to the corresponding n-butaneboronic ester by reaction at room temperature with butaneboronic acid and chromatographed on an SE-30 (3%) column, with flame ionization detection. Practicality of the method for monitoring drug distribution was demonstrated by administering dianhydrogalactitol in therapeutic doses to a dog and monitoring its concentrations in blood for the next 2 h.

Gas Chromatographic Determination of Trace Amounts of the Insect Chemosterilants Tepa, Metepa, Methiotepa, Hempa, and Apholate and the Analysis of Tepa in Insect Tissue

1966 ◽  
Vol 49 (5) ◽  
pp. 1046-1052
Author(s):  
Malcolm C Bowman ◽  
Morton Beroza
Keyword(s):  
Chromatographic Analysis ◽  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Radiometric Method ◽  
Detector Response ◽  
Flame Photometric Detector ◽  
Methanol Extracts ◽  
Gas Chromatographic Analysis ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method, sensitive to as little as 0.1 nanogram, was devised for analysis of the insect chemosterilants tepa, metepa, methiotepa, hempa, and apholate. The method is needed to monitor amounts and persistence of chemosterilant in treated insects. The procedure uses a flame-photometric detector. Response is linear (phosphorus analysis) between 0.1 and at least 200 ng. The procedure was shown to be directly applicable to analysis of methanol extracts of insects fed tepa. Concurrent gas chromatographic and radiometric analyses indicated that the radiometric method would not give satisfactory results without a suitable cleanup, whereas virtually no cleanup was required for the gas chromatographic analysis. The gas chromatographic method is rapid and easily carried out.

Evaluation of Methods for Identifying Fatty Acid Esters Separated by Gas Chromatography

1965 ◽  
Vol 48 (3) ◽  
pp. 482-489
Author(s):  
John L Iverson ◽  
David Firestone ◽  
Jerome Eisner
Keyword(s):  
Fatty Acid ◽  
Retention Time ◽  
Chromatographic Method ◽  
Fats And Oils ◽  
Fatty Acid Esters ◽  
Correct Identification ◽  
Marine Oils ◽  
Gas Chromatographic Method ◽  
Acid Esters ◽  
Evaluation Of Methods

Abstract Correct identification of component fatty acids is frequently difficult when determining fatty acid composition by the AOCS-AOAC gas chromatographic method. Fats and oils that contain a large number of components, such as butter, peanut, and marine oils, are particularly troublesome. The usefulness and limitations of (a) isothermal semilogarithmic plots, (b) retention time ratios, (c) programmed temperature semilogarithmic plots, and (d) variation of retention time with temperature are evaluated.

Gas chromatographic analysis of polyhydroxybutyrate in activated sludge: a round-robin test

2002 ◽  
Vol 46 (1-2) ◽  
pp. 357-361 ◽  
Author(s):  
D. Baetens ◽  
A.-M. Aurola ◽  
A. Foglia ◽  
D. Dionisi ◽  
M.C.M. van Loosdrecht
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Chromatographic Analysis ◽  
Chromatographic Method ◽  
Round Robin ◽  
Analysis Method ◽  
Biological Phosphorus Removal ◽  
Round Robin Test ◽  
Gas Chromatographic Method ◽  
Biological Phosphorus

Polyhydroxyalkanoates (PHA) and poly-β-hydroxybutyrate (PHB) in particular have become compounds which is routinely investigated in wastewater research. The PHB analysis method has only recently been applied to activated sludge samples where PHA contents might be relatively low. This urges the need to investigate the reproducibility of the gas chromatographic method for PHB analysis. This was evaluated in a Round-Robin test in 5 European laboratories with samples from lab-scale and full-scale enhanced biological phosphorus removal systems. It was shown that the standard deviation of measurements in each lab and the reproducibility between the labs was very good. Experimental results obtained by different laboratories using this analysis method can be compared. Sludge samples with PHB contents varying between 0.3 and 22.5 mg PHB/mg sludge were analysed. The gas chromatographic method allows for PHV, PH2MB and PH2MV analysis as well.

A Simple Pressurized Sampling System for Use Prior to Gas Chromatographic Analysis of Aerosol Cosmetics

1974 ◽  
Vol 57 (4) ◽  
pp. 973-977
Author(s):  
Dhiam H Liem ◽  
Gerrit J Rundervoort
Keyword(s):  
Chromatographic Analysis ◽  
Sampling Method ◽  
Chromatographic Method ◽  
Gas Chromatograph ◽  
Sampling System ◽  
Direct Introduction ◽  
Aerosol Container ◽  
Coefficients Of Variation ◽  
Total Analysis ◽  
Gas Chromatographic Method

Abstract Pressurized sampling of liquids, such as aerosol hairsprays, prior to direct introduction into the gas chromatograph is possible with simple and inexpensive devices, namely, some plastic transfer pieces, a small empty all-glass aerosol container with a valve but without a dip tube, and a special gas syringe (0–25 μl) with a small sliding Teflon valve at the end. This method of sampling has been tested for reproducibility and reliability (coefficients of variation of 1.2% for propellants 11 and 12, 2.3% for ethanol, and 1.1% for dichloromethane). By using the proposed sampling method and a previously reported gas chromatographic method, a quantitative and total analysis of solvents and propellants in aerosol hairsprays can be completed in 1 hr. Fifty commercial aerosol hairsprays have been analyzed by using this system.

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