METHODS
With new methodologies being accepted throughout the world PSA strives to keep its equipment compatible with these new measures.
P S Analytical's team of applications chemists have, over the past 25 years developed many applications and methods for the determination of mercury, arsenic, selenium, tellurium, antimony and bismuth. Details of many of these applications/methods can be found on our application notes page.
P S Analytical also supplies instrumentation to comply with the more recent AFS based standards methods, as well as the older AAS based methods.
A list of common reference methods from ISO, ASTM and the US EPA can be found below, as well as links to the appropriate PSA instrument utilised for the partical methodology.
Methods for Total Mercury in Water Samples
EPA method 1631e
This is the latest EPA method for measuring mercury in water. The method is based on cold vapor amalgamation atomic fluorescence spectroscopy.
The Millennium Merlin 1631 is an ideal instrument for this application, click here for information.
The method can be downloaded from the EPA web site by following the link below:
EPA 1631e Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Spectrometry
EPA method 245.7
This is another new method from the EPA and was designed to measure Hg in water. The method is based on cold vapor atomic fluorescence and the Millennium Merlin in is an ideal tool for this methodology.
The Millennium Merlin 1631 is also capable of running this method.
The method can be downloaded from the EPA web site by following the link below:
EPA 245.7 Mercury in Water by Cold Vapor Atomic Fluorescence Spectrometry
EPA methods 245.1 and 245.2
These are two older EPA methods and are based on cold vapour atomic absorption, they were developed in the 1970's before atomic fluorescence became a more prominent methodology. The detection limits of thes methods were in the 0.2ppb range.
P S Analytical supplies the Millennium Merlin AA CV system to run these methods.
These methods can be downloaded from the EPA web site by following the links below:
EPA 245.1 Determination of Mercury in Water by Cold Vapor Atomic Absorption Spectrometry
EPA 245.2 Mercury (Automated Cold Vapor Technique)
BS ISO 17852 (Formerly EN 13506)
ISO 17852:2006 Water quality. Determination of mercury. Method using a combined preservation and digestion step followed by atomic fluorescence spectrometry
This is the European standard method for the determination of mercury in water samples. The method is based on Cold Vapour Atomic Fluorescence Spectrometry.
P S Analytical supplies the Millennium Merlin and Millennium Merlin 1631 for this method.
( A free viewer is downloadable from the Adobe website, please see our Downloads page).
To discuss particular requirements and for more detailed information on the above please complete the Information Request Form.
