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TREATING SOIL SOLUTION SAMPLERS TO PREVENT MICROBIAL REMOVAL OF ANALYTES
Citation:
Lewis, D., A. Simons, W. More, AND D. Gattie. TREATING SOIL SOLUTION SAMPLERS TO PREVENT MICROBIAL REMOVAL OF ANALYTES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-92/126 (NTIS PB92166610), 1992.
Description:
Soil microorganisms colonizing soil water sampling devices (lysimeters) reduced concentrations of biodegradable organic chemicals, including 2,4-dichlorophenoxy-acetic acid methyl ester, alachlor, methyl m-chlorobenzoate, and metolachlor as water entered through porous ceramic cups. n some cases, losses exceeded 99%. dditions of either a biocide (sodium hypochlorite) or a bacteriostat (copper salt) prevented microbial activity so that concentrations of test chemicals inside lysimeters equaled those outside. ield studies further indicated that treating lysimeters with a copper salt effectively prevented microbial activity. hus, chemically treating soil water samplers could improve the accuracy of soil water data for a wide variety of analytes, including environmentally important organics, such as pesticides and industrial wastes, and inorganics, such as ammonia and nitrate.
