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Updated: Aug 8, 2026

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
Published on: July 1, 2016
A simple plant nutrient solution purification method for effective removal of trace metals using controlled pore
D L Eskew1, R M Welch, E E Cary
1United States Plant, Soil and Nutrition Laboratory, Agricultural Research Service, United States Department of Agriculture, Cornell University, Ithaca, New York 14853.
Abstract:
Column chelation chromatography on controlled pore glass-8-hydroxyquinoline was demonstrated to be a very efficient method for removing trace metal contaminants from concentrated macronutrient salt solutions used to prepare nutrient media. By using (63)Ni and (65)Zn radio-isotopes as tracers, controlled pore glass-8-hydroxyquinoline column packings were found to retain 99.9% of the radiotracer and quantitative recovery of the radioisotopes from these columns was obtained by eluting with 1.2 n HCl. This method has several advantages over liquid-liquid extraction methods of purification which previously have been used in plant micronutrient research.
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