Kathy Echols, PhD
Dr. Kathy Echols is a Research Chemist at the Columbia Environmental Research Center.
She leads the Environmental Forensics Group in the Environmental Chemistry Branch at the center. Her expertise includes persistent organic pollutant analysis, especially in tissue matrices; also does research in algal toxin analysis and emerging contaminant analysis.
Professional Experience
2004-present Research Chemist, Group Leader, Environmental Forensics, Environmental Chemistry Branch, CERC, USGS, Columbia, Missouri.
2000-2004 Research Chemist, Organic Section, Environmental Chemistry Branch, CERC, USGS.
1996-2000 Research Chemist, Organic/Biochemistry Section, USGS, MSC and CERC.
1997-1998 Adjunct Professor, Chemistry Department, University of Missouri-Columbia.
1997-1998 Adjunct Professor, Chemistry Department, University of Missouri-Columbia.
1993-1996 Research Chemist, Leader of Chromatography Section, National Biological Service, CERC
1992-1993 Research Chemist, Leader of Chromatography Section, U.S. Fish and Wildlife Service, National Fisheries Contaminant Research Center, Columbia, MO.
Education and Certifications
Ph.D. Analytical Chemistry, University of Missouri, 1992
B.S. Chemistry, College of William and Mary, 1987
Science and Products
Loading capacity and chromatographic behavior of a porous graphitic carbon column for polychlorinated biphenyls
Estimation of uptake rate constants for PCB congeners accumulated by semipermeable membrane devices and brown treat (Salmo trutta)
An automated HPLC method for the fractionation of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans in fish tissue on a porous graphitic carbon column
Organochlorine contaminants in double-crested cormorants from Green Bay, WI: I. Large-scale extraction and isolation from eggs using semi-permeable membrane dialysis
Use of the semipermeable membrane device as an in situ sampler of waterborne bioavailable PCDD and PCDF residues at sub-parts-per-quadrillion concentrations
Science and Products
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Loading capacity and chromatographic behavior of a porous graphitic carbon column for polychlorinated biphenyls
A porous graphitic carbon column (Hypercarb) was used for the fractionation of polychlorinated biphenyls (PCBs) into classes of 2-4 ortho chlorines, 1 ortho chlorine and 0 ortho chlorine congeners. A method was developed that combined the fractionation of PCBs, polychlorinated dibenzo-p-dioxins and dibenzofurans in a variety of biotic environmental samples. Many of these samples have high concentrAuthorsK. R. Echols, R.W. Gale, K. Feltz, J. O'Laughlin, D. E. Tillitt, T.R. SchwartzEstimation of uptake rate constants for PCB congeners accumulated by semipermeable membrane devices and brown treat (Salmo trutta)
The triolein-filled semipermeable membrane device (SPMD) is a simple and effective method of assessing the presence of waterborne hydrophobic chemicals. Uptake rate constants for individual chemicals are needed to accurately relate the amounts of chemicals accumulated by the SPMD to dissolved water concentrations. Brown trout and SPMDs were exposed to PCB- contaminated groundwater in a spring forAuthorsJ.C. Meadows, K. R. Echols, J.N. Huckins, F.A. Borsuk, R.F. Carline, D. E. TillittAn automated HPLC method for the fractionation of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans in fish tissue on a porous graphitic carbon column
The Ah (aryl-hydrocarbon) hydroxylase-receptor active polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) were fractionated by an automated high-performance liquid chromatography (HPLC) system using the Hypercarb™ porous graphitic carbon (PGC) column. This commercially available column was used to fractionate the di-, mono-, and nonAuthorsKathy R. Echols, Robert W. Gale, Donald E. Tillitt, Ted R. Schwartz, Jerome O'LaughlinOrganochlorine contaminants in double-crested cormorants from Green Bay, WI: I. Large-scale extraction and isolation from eggs using semi-permeable membrane dialysis
A 41.3-kg sample of double-crested cormorant (Phalacrocorax auritus) egg contents was extracted, yielding over 2 L of egg lipid. The double-crested cormorant (DCC) egg extract, after clean-up and concentration, was intended for use in egg injection studies to determine the embryotoxicity of the organic contaminants found within the eggs. Large-scale dialysis was used as a preliminary treatment toAuthorsJ.C. Meadows, D. E. Tillitt, T.R. Schwartz, D.J. Schroeder, K. R. Echols, R.W. Gale, D.C. Powell, S.J. BursianUse of the semipermeable membrane device as an in situ sampler of waterborne bioavailable PCDD and PCDF residues at sub-parts-per-quadrillion concentrations
Semipermeable membrane devices (SPMDs) were used to passively sample aqueous polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in Bayou Meto, AR. The two sites were upstream and downstream from the confluence with a tributary that delivers PCDDs and PCDFs to the Bayou. Following dialysis, cleanup, and fractionation, four replicate 17-9 SPMD samples from each siteAuthorsJon A. Lebo, Robert W. Gale, Jimmie D. Petty, Donald E. Tillitt, James N. Huckins, John C. Meadows, Carl E. Orazio, Kathy R. Echols, Dennis J. Schroeder, Lloyd E. Inmon