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TM22-01 Lab contamination bias leads to limits on low-conc data reporting for hexamethylenetetramine and data reloads for hexamethylenetetramine, gabapentin, guanylurea, and ractopamine, to NWIS for samples analyzed by NWQL schedule 2440

By National Water Quality Program
22-01_Hexamine_TM_release.pdf (1.21 MB)

Detailed Description

This memorandum alerts users of the U.S. Geological Survey (USGS) National Water Quality Laboratory (NWQL) to a new publication that details the procedures used for determining and applying detection limits and reporting levels for results determined by NWQL methods. The citation for this journal article, shown formatted for use in USGS publications, is: Foreman, W.T., Williams, T.L., Furlong, E.T., Hemmerle, D.M., Stetson, S.J., Jha, V.K., Noriega, M.C., Decess, J.A., Reed-Parker, C., and Sandstrom, M.W., 2021, Comparison of detection limits estimated using single- and multi-concentration spike-based and blankbased procedures: Talanta, v. 228, article 122139, 15 p., accessed [enter date article accessed] at https://doi.org/10.1016/j.talanta.2021.122139.

Sources/Usage

Public Domain.

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TM22-01 Attachment 1: Appendix to National Water Quality Laboratory Technical Memorandum 2022.01 -- Laboratory contamination bias leads to limits on low-concentration data reporting

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TM22-01 Attachment 1: Appendix to National Water Quality Laboratory Technical Memorandum 2022.01 -- Laboratory contamination bias leads to limits on low-concentration data reporting

TM22-01 Attachment 1: Appendix to National Water Quality Laboratory Technical Memorandum 2022.01 -- Laboratory contamination bias leads to limits on low-concentration data reporting

Appendix to Laboratory contamination bias leads to limits on low-concentration data reporting for hexamethylenetetramine and data reload for hexamethylenetetramine, and metadata reload for gabapentin, guanylurea, and ractopamine, to the National Water Information System for samples analyzed from October 2016 through March 4, 2021, for pharmaceuticals in filtere

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