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Description: Book cover
A New Procedure for Determining Detection and Quantitation Limits in Wastewater Analysis
Abstract
The Method Detection Limit (MDL) procedure at CFR40 Part 136 Appendix B is currently used for almost all determinations of detection limits for EPA analytical methods, and is mandated for wastewater analysis under Part 136. The procedure has several failings, including: Lack of any consideration of non-zero blanks; lack of any consideration of long term variability; failure to accommodate EPA methods which censor data at some level; and failure to accommodate non-normal data or non-constant variance. These weaknesses can result in incorrect determinations of the detection limit, and prompted EPA to establish a Federal Advisory Committee to develop an improved procedure.
The Method Detection Limit (MDL) procedure at CFR40 Part 136 Appendix B is currently used for almost all determinations of detection limits for EPA analytical methods, and is mandated for wastewater analysis under Part 136. The procedure has several failings, including: Lack of any consideration of non-zero blanks; lack of any consideration of long term variability; failure to accommodate EPA...
Author(s)
Richard Burrows
SourceProceedings of the Water Environment Federation
SubjectSession 68: Featured Session – Lab Practices Detection and Quantitation: New Methods and Perspectives of The U.S. EPA's Federal Advisory Committee
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Jan, 2008
ISSN1938-6478
SICI1938-6478(20080101)2008:11L.5205;1-
DOI10.2175/193864708788804711
Volume / Issue2008 / 11
Content sourceWEFTEC
First / last page(s)5205 - 5206
Copyright2008
Word count113

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