%0 Journal Article %J Arch Environ Contam Toxicol %D 2004 %T Bioaccumulation profiles of chemical contaminants in fish from the lower Willamette River, Portland Harbor, Oregon. %A D Sethajintanin %A Johnson, Eugene R %A Loper, Bobby R %A Kim A Anderson %K Animals %K Environmental Monitoring %K Environmental Pollutants %K Fishes %K Hazardous Waste %K Insecticides %K Mercury %K Oregon %K Polychlorinated Biphenyls %K Reference Values %K Tissue Distribution %K Water Pollutants, Chemical %X

Twenty-five PCBs (polychlorinated biphenyls), 15 organochlorine (OC) pesticides, and mercury were determined in fish from the Willamette River in Oregon, including a Portland Harbor superfund site. Fish were collected during the summer of 2000 along a 20-mile stretch of the lower Willamette River. Concentrations of sumPCBs (sum of 25 individually determined PCB congeners) and sumDDTs (sum of p,p'-DDT, p,p'-DDE, and p,p'-DDD) in fish ranged from 14 to 530 and from 18 to 510 ng/g-wet weight, respectively. SumPCBs concentrations at all sites exceeded US EPA fish advisory's screening values. Hexachlorobiphenyl congener 153 was the most abundant of the PCBs detected and p,p'-DDE was the most abundant OC pesticide detected. Low levels of dieldrin were detected in fish at all sites with the highest concentration at the superfund site (4.6 ng/g-wet weight), while other OC pesticides tested were near or below detection limits (approximately 2 ng/g). In general, organic chemical contaminant concentrations were highest in fish from the superfund site and were lower further upriver. Smallmouth bass had the highest levels of OC compounds of three fish species examined. They also had the largest site-to-site variations whereas black crappie had little variation throughout the study area. Mercury levels in fish ranged from 13 to 520 ng/g. Historical fish residue data are limited from the Portland Harbor superfund site, what data is available is over a decade old, generally consisted of only a few fish (< or = 3) and analyses quantified only a few PCB congeners (< 3).

%B Arch Environ Contam Toxicol %V 46 %P 114-23 %8 01/2004 %G eng %N 1 %1 http://www.ncbi.nlm.nih.gov/pubmed/15025171?dopt=Abstract %0 Journal Article %J J AOAC Int %D 2003 %T Determination of pyrethrin and pyrethroid pesticides in urine and water matrixes by liquid chromatography with diode array detection. %A Loper, Bobby R %A Kim A Anderson %K Calibration %K Chromatography, Liquid %K Humans %K Indicators and Reagents %K Insecticides %K Pyrethrins %K Reference Standards %K Spectrometry, Mass, Electrospray Ionization %K Spectrophotometry, Ultraviolet %K Water %X

The following pyrethrin and pyrethroid pesticides were determined in urine and water matrixes by liquid chromatography with diode array detection (LC-DAD): pyrethrin I, pyrethrin II, tetramethrin, baythroid, bifenthrin, fenvalerate, phenothrin, allethrin, resmethrin, cis-permethrin, and trans-permethrin. In addition, 3-phenoxybenzyl alcohol, a metabolite of various pyrethroids, was also successfully determined by the analytical method. The matrix extraction was simple, inexpensive, and fast, using only sodium chloride and acetonitrile. The acetonitrile extract was filtered and analyzed by LC-DAD. The method detection limits for the pyrethrin pesticides in 5 mL urine were determined to range from 0.002 to 0.04 microg/mL, depending on the individual pyrethrin. Recoveries from spiked tap water ranged from 77 to 96%; recoveries from urine ranged from 80 to 117%. This method is especially well-suited to clinical investigations, in which rapid analysis of forensic samples is often required.

%B J AOAC Int %V 86 %P 1236-40 %8 11/2003 %G eng %N 6 %1 http://www.ncbi.nlm.nih.gov/pubmed/14979708?dopt=Abstract %0 Audiovisual Material %D 2002 %T Bioaccumulation profiles of chemical contaminants from the Willamette River Portland Harbor Superfund Site and Human Health Risks Assessment %A D Sethajintanin %A Johnson, Eugene R %A Loper, Bobby R %A Brian W Smith %A Kim A Anderson %B PNW SETAC Regional Mtg, Portland, OR %8 2002 %G eng %0 Generic %D 2002 %T Chemical Bioavailability in Eco-systesm: Case Study of Contaminants In Portland Harbor %A D Sethajintanin %A Johnson, Eugene R %A Loper, Bobby R %A Brian W Smith %A Kim A Anderson %B PNW SETAC Regional Mtg, Portland, OR %8 05/2002 %G eng %0 Journal Article %J J Agric Food Chem %D 2002 %T Chemical marker for ALS-inhibitor herbicides: 2-aminobutyric acid proportional in sub-lethal applications. %A Loper, Bobby R %A Cobb, William T %A Kim A Anderson %K Acetolactate Synthase %K Aminobutyric Acids %K Autoanalysis %K Chromatography, Liquid %K Enzyme Inhibitors %K Herbicides %K Kinetics %K o-Phthalaldehyde %K Solanum tuberosum %K Trichloroacetic Acid %X

A chemical profiling technique for sub-lethal acetolactate synthase (ALS)-inhibitor herbicides (e.g., sulfonylureas, imidazolines, triazolopyrimidine sulfonanilides, and pyrimidyloxy salicylic) was developed using 2-aminobutyric acid, and was found to be directly proportional to application rates in field studies on two varieties of potato plants. An uncomplicated, benign-by-design analytical method for the determination of 2-aminobutyric acid in plant tissue was developed. The method is simple, fast, and automated, entailing a water-trichloroacetic acid extraction followed by precolumn on-line derivatization using o-phthalaldehyde (OPA) solution and liquid chromatographic analyses. Use of reagents and chlorinated organic solvents, and generation of waste, are minimized as compared to other ALS-inhibitor herbicide analytical techniques. Recoveries for a series of fortified plant tissues ranged from 82 to 103%. Two 20-day field trials on two potato varieties, Russet Burbank and Shepody, were conducted during the 2000 and 2001 growing seasons. The study demonstrated that the 2-aminobutyric acid method is an excellent, selective chemical marker technique for ALS-inhibitor herbicides for real world plant matrixes.

%B J Agric Food Chem %V 50 %P 2601-6 %8 2002 Apr 24 %G eng %N 9 %1 http://www.ncbi.nlm.nih.gov/pubmed/11958629?dopt=Abstract %0 Audiovisual Material %D 2002 %T Human Health Risks Associated with Organochlorine Pesticides and PCBs in Fish from the Willamette River & Portland Harbor %A Kim A Anderson %A D Sethajintanin %A Johnson, Eugene R %A Loper, Bobby R %A Brian W Smith %B PITTCON®‘01 Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, New Orleans, LA %8 2002 %G eng %0 Journal Article %J Communications in Soil Science and Plant Analysis %D 2001 %T Analytical Method for Determination of Shikimic Acid: Shikimic Acid Proportional to Glyphosate Application Rates %A Kim A Anderson %A Cobb, William T %A Loper, Bobby R %B Communications in Soil Science and Plant Analysis %V 32 %8 2001 %G eng %N 17,18 %& 2831-2840 %0 Audiovisual Material %D 2001 %T Human Health Risks Associated from PCBs in Fish from the Willamette River & Portland Harbor %A D Sethajintanin %A Johnson, Eugene R %A Loper, Bobby R %A Brian W Smith %A Kim A Anderson %B Annual SETAC mtg, Baltimore, MD %8 2001 %G eng %0 Audiovisual Material %D 2001 %T Human Health Risks Associated from PCBs in Fish from the Willamette River & Portland Harbor %A D Sethajintanin %A Johnson, Eugene R %A Loper, Bobby R %A Brian W Smith %A Kim A Anderson %B AOAC International Meeting., Tacoma, WA %8 2001 %G eng