The Study Of Akali Metal Contamination In Road Side Soil

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preparation: Six surface soil samples were collected at the intersection of
Cold Spring Lane and the exit ramp of Interstate 83, in northwest Baltimore city.
These samples were collected at distances from the roadway of 0m, 2m, 4m, 6m,
10m, and 20m. These samples were dried in a convection oven at 110°C for over 24
hours then crushed. Aliquots of approximately one gram were weighed and then
extracted with 10.0 mL of 1M ammonium acetate. The extract was filtered with an
inline filter disc with a pore size of 5mm and then diluted to 100.0 mL.

Instrumental: The extracts were analyzed for Ca, Na, and Mg using a Varian model
AA-3 flame atomization spectrophotometer with a diffraction grating
monochromator. Data was collected with a Houston Instrument chart recorder. An
acetylene/air reducing flame was used for all determinations (10 psi acetylene/7
psi air). Two replicates of each sample were made and averaged for both AA and
AE. The analysis was seperated into two ...

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