The following presentation is an adaptation of the PowerPoint
presentation we have presented at various California Water
Environment Association (CWEA) meetings since 2004. During this
presentation we provided an introduction into the EPA draft
method 1630 for methyl mercury in waters. BASIS OF MOST METHYL
MERCURY ANALYSES EPA draft Method 1630 for methyl mercury
analysis is a very sensitive technique using an atomic
fluorescence detector for sub nanogram per liter quantitation of
methyl mercury in waters. Most all environmental methyl mercury
analyses is a variation on the same theme demonstrated in the
EPA draft method - EPA Draft method 1630 is not promulgated,
explaining why multiple variations are performed. - Many lab's
approach similar, but different enough that their own SOP is
referenced rather than the EPA 1630 method itself. Example is in
the CAL-FED Mercury Project QAAP, App. D List of Methods is
individual lab SOPs renamed. SIMILARITY OF THE METHODS
Distillation, ethylation, purge and trap, GC se