Targeted Toxin Analysis….Beyond the Compounds in EPA Method 544 and 545..Be Careful What You Look For..It Might Be There.Drinking Water
Oral Presentation
Prepared by S. Oehrle
Waters Lab Northern Kentucky University, Chemistry Dept, 100 Nunn Dr, Highland Heights, KY, 41099, United States
Contact Information: [email protected]; 859-572-5409
ABSTRACT
Cyanotoxin analysis of various water sources (recreational and intake for drinking) is critical from a safety standpoint. Targeted LC/MS/MS analysis is a particularly useful technique to monitor for algal toxins. These analyses are generally guided by commercial standards, which are available for a suite of common toxins. However, hundreds of toxin variants exist and most, including toxins that have been seen regularly in blooms, do not have established, standards or reference material. Since EPA Methods 544 and 545 have come out in 2015 several toxin standards have become available. In addition, many “other” compounds of interest have arisen as both standards and materials become available. This talk will discuss specific examples, including results from intake water samples as well as direct injection analysis of sub ppb levels of the standard toxins in drinking water intakes from a river. Expanded monitoring for toxins in a single injection will be discussed.
