Echo Filter Effectiveness Test: Glyphosate Herbicide Removal

Echo Filter Effectiveness Test: Glyphosate Herbicide Removal

Test Item:

Echo Water Filter

Test Description:

Effectiveness of glyphosate herbicide removal

Methods:

Sample Analysis:

HRI TM #8 "Glyphosate and AMPA Detection by LC-MS/MS"

Sample preparation employed a modification of the method described in Chamkasem, Narong, Cynthia Morris, and Tiffany Harmon. 2016. “Direct Determination of Glyphosate, Glufosinate, and AMPA in Milk by Liquid Chromatography/tandem Mass Spectrometry.” Journal of Regulatory Science 3 (2): 20–26.

LC-MS/MS analysis employed a modification of the method described in Jensen, Pamela K., Chad E. Wujcik, Michelle K. McGuire, and Mark A. McGuire. 2016. “Validation of Reliable and Selective Methods for Direct Determination of Glyphosate and Aminomethylphosphonic Acid in Milk and Urine Using LC-MS/MS.” Journal of Environmental Science and Health, Part B 51 (4): 254–59. doi:10.1080/03601234.2015.1120619.

Not Detected indicates the result was less than the lowest possible amount of glyphosate detectable by the laboratory's instruments equal to 0.007 ng/ml. A level of 1 ng/ml was selected for input to the filter to simulate real-world conditions based upon actual measurements of municipal water supplies and wells known to contain glyphosate.