This research describes the development of a dual preservation and field speciation technique
for the arsenic species arsenite [As(III)] and arsenate [As(V)] using ion exchange field
speciation of a sample preserved with EDTA and acetic acid. The new method is compared
with existing speciation methods and is shown to be simple, robust, free of hazardous
chemicals, and capable of recovering >90% of As(III) and As(V) despite possible interference
from ferrous iron in the sample. The method was further refined through testing on 20
drinking water wells in five states. Results indicated that As(III) measured by field speciation
agreed with subsequent lab speciation (conducted two to four days later) on the preserved
sample with a correlation coefficient of R<sup>2</sup> = 0.997. Includes 31 references, tables, figures.
| Edition : | Vol. 98 - No. 5 |
| File Size : | 1
file
, 410 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 05/01/2006 |
