References
- Poole , C. F. 1977 . J. Chrom. , 136 : 73 – 83 .
- EPA Methods Manual for Water & Wastewater USEPA Ohio. : Cincinnati .
- 1980 . AOAC Official Methods Thirteenth Edition Washington, D. C. : AOAC .
- Stahr , H. M. , ed. 1980 . Analytical Toxicology Methods Manual Vol. II , ISU Press .
- Unpublished data Ames, Iowa, 50011 : Iowa State University, Veterinary Diagnostic Laboratory .
- Unpublished data from Hitachi Chicago, Illinois : Application Laboratory Courtesy of Michael Kamerlink, M. K. Associates .
- Unpublished data from Varian application laboratory courtesy Dr. Douglas Schrader Parkridge Illinois