Gas chromatography determination

GAS CHROMATOGRAPHY DETERMINATION FOR SMALL QUANTITIES OF WATER IN ORGANIC SOLVENTS... 

Pirini, A. and Conte, L. S. (1992). Capillary gas chromatography determination of free amino acids in honey as a mean of discrimination between different botanical sources. /. Fdigh Res. Chromatogr. 15,165-170. 

Schoene, S., Steinhanses, J. (1985) Determination of Henry s law constant by automated headspace gas chromatography determination of dissolved gases. Fresenius Z. Anal. Chem. 321, 538-543. 

R. I Icrracz.-I Icrnandcz, A. J. H. Louter, N. C. van de Merbel and U. A. Th Brinkman, Automated on-line dialysis for sample preparation for gas chromatography determination of benzodiazepines in human plasma , J. Pharm. Biomed. Anal. 14 1077-1087 (1996). 

Aqueous samples can be analyzed by purge and trap extraction, followed by gas chromatography determination using FID or PID-FID connected in series. The aromatic fractions can be determined by PID or FID. 

Pauschmann, H. Gas chromatography determination of hydrogen using helium as carrier gas. Z. Anal. Chem. 203, 16 (1964). 

Determination. Using electron capture gas chromatography, determine the methyl ester of acid (step 5) and the PGBE ester of silvex (step 6) as outlined for mud analyses. 

Sievers, R. E, Eisentraut, K. J. et al. Microanalysis by gas-chromatography Determination of metals in lunar dust and rock, VI. Intern. Sympos. Microchem. Graz 1970, Vol. B 247... 

Chen S-H, Wu S-M, Kou H-S, et al. Electron-capture gas chromatography determination of cyanide iodide, nitrite, sulfide and thiocyanate ions by phase-transfer-catalyzed derivatization with pentafluorobenzyl bromide. J Anal Toxicol, 1994 18 81-85. 

Using Chemical Abstracts or SciFinder Scholar (the online access to Chemical Abstracts—see Appendix A) if your library subscribes to it, find at least one article on the gas chromatography determination of ethanol in blood. Read the journal article and write a summary of the principle of the method and prepare a synopsis of the procedure employed, including any sample preparation. Is there information on the accuracy and precision of the method ... 

Ericsson, M. and Colmsjo, A., Dynamic microwave-assisted extraction coupled online with SPE and large-volume injection gas chromatography determination of organophosphate esters in air samples. Anal. Chem., 75, 1713-1719, 2003. 

Kawamura, K. and I. R. Kaplan. 1984. Capillary gas chromatography determination of volatile organic acids in rain and fog samples. Anal. Chem. 56 1616-1620. 

It is very important and the most important task for the analyst who is responsible for operation and maintenanee of analytical instrumentation. Calibration is followed by a verifieation proeess in which specifications can be established and the analyst ean evaluate whether or not the calibration is verified or refuted. A calibration that has been verified can be used in acquiring data from samples for quantitative analysis. A calibration that has been refuted must be repeated until verification is achieved, e.g., if, after establishing a multipoint calibration for benzene via a gas chromatographie determinative method, an analyst then measures the concentration of benzene in a certified reference standard. The analyst expects no greater than a 5% relative error and discovers to his surprise a 200% relative error In this case, the analyst must reconstruct the calibration and measure the certified reference standard again. Close attention must be paid to those sourees of... 

Indeed, the fish must be transformed in some manner prior to measurement by a determinative technique—in this case, by gas chromatography. Determinative techniques utilize instrumental analysis approaches and... 

Prepare a sample of your final product for analysis by gas chromatography. Determine the infrared spectrum and both proton and NMR spectrum of your product. Use these spectra to determine the structure of your product. In your laboratory report, include an interpretation of each spectrum, identifying the principal absorption bands and demonstrating how the spectrum corresponds to the structure of your compound. Submit your sample in a labeled vial with your laboratory report. 

Gas Chromatography Determination of Methaqualone in Small Amounts of Serum After Ingestion of Therapeutic Doses... 

Trace Components of a Mixture for Gas Chromatography Determination of Ethanol, Methanol, and 2-Propanol in Blood... 

The formation, presence and activity of the non-volatile plant growth regulators in soil have received far less attention than that focussed on ethylene. Indeed the studies that have been undertaken have been somewhat less rigorous than those on ethylene. One of the major and fundamental differences is the ease of chemical analysis. Ethylene can be determined rapidly and unequivocally by gas chromatography. Determination of the non-volatile hormones usually involves a complex extraction procedure and more sophisticated chemical instrumentation. Even if only one of the gibberellins, gibberellic acid (GA ), were to be determined, it v/ould be desirable to label the material by incorporating -mevalonate, a precursor, into the compound bio-... 

Gas chromatography Determination of volatile organic compounds (ISO 11890-2 -VOCs 0.1-15%). 

Garrido Frenich, A., P. Plaza-Bolanos, and J. L. Martmez Vidal. 2008. Comparison of tandem-in-space and tandem-in-time mass spectrometry in gas chromatography determination of pesticides application to simple and complex food samples. J. Chromatogr. A 1203 229-238. 

Zhou, X., Shao, X., Shu, J.-J., Liu, M.-M., Liu, H.-L., Feng, X.-H., Liu, F. Thermally stable ionic hquid-based sol-gel coating for ultrasonic extraction-solid-phase microextraction-gas chromatography determination of phthalate esters in agricultural plastic films. Talanta. 2012,89,129-135. 

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