Zobrazeno 1 - 10
of 27
pro vyhledávání: '"William E. Brewer"'
Publikováno v:
Journal of Chromatography B. 1084:64-68
An analytical procedure for the analysis of 10 β-adrenergic agonists (cimaterol, terbutaline, salbutamol, isoxsuprine, ractopamine, cimbuterol, clenbuterol, brombuterol, mabuterol and mapenterol) in pork meat was developed and validated using LC-MS/
Autor:
Erik C. Vik, Ishwor Karki, William E. Brewer, Evan Divirgilio, Ping Li, Alexander Manzewitsch, Ken D. Shimizu
Publikováno v:
Reactive and Functional Polymers. 163:104888
The hydrophilic-lipophilic balance (HLB) polymers are able to directly extract polar and non-polar analytes from the aqueous samples, making them very popular for analytical separation and SPE applications. However, the commonly used suspension polym
Publikováno v:
Journal of Agricultural and Food Chemistry. 61:2299-2314
This paper reports the development of an automated method of QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) using pipet tips fitted with filtration screens and containing primary-secondary amine, magnesium sulfate, and graphitized carbon b
Autor:
Kaylee R. Mastrianni, Stephen L. Morgan, Nagaraju Dongari, William E. Brewer, Michael Barna, L. Andrew Lee
Publikováno v:
Journal of Analytical Toxicology.
A collaborative study was conducted to investigate discrepancies in recoveries of two commonly prescribed compounds, amitriptyline and cyclobenzaprine, in patient urine samples when hydrolyzed with different enzymes from different sources. A 2- to 10
Publikováno v:
Journal of Agricultural and Food Chemistry. 58:5973-5981
Simple and rapid methods for the analysis of pesticides in produce samples have been developed. The current study involves analysis of nonpolar and polar pesticides using GC-ECD and GC-NPD, respectively. The nonpolar pesticides were extracted using d
Publikováno v:
Analytical Chemistry. 73:2371-2376
Supercritical fluid extraction (SFE) using CO2 modified with methanol (10%) was employed for the extraction of cocaine from human hair. Extraction conditions were developed by using designed experiments to characterize the effects of pressure, temper
Publikováno v:
Applied Spectroscopy. 54:1876-1881
We demonstrate the in situ identification of crack cocaine and cocaine·HCl by using a fiber-optic Raman probe and a portable Raman spectrograph. The Raman spectrum of freebase cocaine (crack) is obtained in just seconds without any sample preparatio
Autor:
William E. Brewer, S. Michael Angel, Dimitra N. Stratis, Brian J. Marquardt, J. Chance Carter
Publikováno v:
Journal of Raman Spectroscopy. 30:795-805
Publikováno v:
Journal of Chromatographic Science. 37:210-214
High-speed gas chromatographic (GC) screening for drugs of forensic relevance is performed using a commercial Flash GC instrument in which the chromatographic column is resistively heated at rates of up to 30 degrees C/s. Temperature programming cond