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Whether you're an analyst-of-all-trades at a municipality or a water quality specialist at a commercial laboratory, we have the information you need to succeed. Water Environment Laboratory Solutions focuses on day-to-day laboratory concerns, as well as discussing certification issues, staff management approaches, and new & revised analytical methods. |
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Legalizing LDO Measurements
How to navigate the ATP process for luminescent dissolved-oxygen probes
Even though luminescent dissolved-oxygen (LDO) sensor technology has been proven through practice, and the U.S. Environmental Protection Agency (EPA) has issued letters calling the measurement equivalent to the method approved for wastewater monitoring, the use of this new tool has not yet been incorporated into the officially approved methods printed in 40 CFR 136.3, “Identification of Test Procedures.”
This delay is a matter of logistics, rather than science.
This article discusses what different EPA regions require to approve LDO probes as an alternate test procedure for National Pollutant Discharge Elimination System reporting.
Detecting Bacteria by Glow
A team of Michigan Technological University (MTU; Houghton) researchers led by associate professor of chemistry Haiying Liu has discovered how to make a strain of Escherichia coli glow under fluorescent light. The technique, which takes advantage of the unique carbohydrate structures found on the membranes of bacteria and other cells, eventually could be used to track down many types of pathogens.
New Test Speeds Triclosan Detection in Water
A new test for detecting triclosan should expedite environmental monitoring of the antibacterial agent in rivers, wells, and other water sources, according to studies by the U.S. Department of Agriculture (USDA) Agricultural Research Service (ARS) and collaborating scientists.
The test is an enzyme-linked immunosorbent assay (ELISA). The test uses an antibody that recognizes triclosan and leads to a colorimetric reaction. The intensity of the color is inversely proportional to the amount of triclosan in the sample.
Member Association Rewards Good Practices
Each year, the Indiana Water Environment Association (IWEA; Indianapolis) sends its laboratory committee members on auditing missions. The targets are environmental labs throughout the state that have chosen to participate in the Outstanding Laboratory Award program.
The Outstanding Laboratory Award is presented for outstanding achievement in the implementation of laboratory technique and administration. Awards are given to multiple municipal facilities in each wastewater treatment plant size classification.
While the award recognizes excellent work, the main motivation is to develop better laboratory practices.
WebNotes
Reprints questions, and answers from WEF’s laboratory discussion boards.
Laboratory Exercise
Test your knowledge of whole effluent toxicity
Briefs
Quick updates on news of interest to the wastewater laboratory analyst.
Reader Reaction
Each month the questions in this section will solicit your reaction to a current or future article. We'll share your answers to these questions in a future issue of Solutions.
This issue’s installment includes results of the Glucose-Glutamic Acid Preparation survey as well as some new questions. (Click the topics below to voice your opinion)
©2009 Water Environment Federation. All rights reserved. |
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