Comparison of Hg EDS and WDS Analysis on Commercial Plastic Material

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Comparison of Hg EDS and WDS Analysis on
Commercial Plastic Material
By John J. Donovan University of Oregon,
Department of Chemistry
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EDS Analysis
100 sec counting time (no visible peak)
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EDS Analysis (contd)
500 sec counting time (no visible peak)
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EDS Analysis (contd)
1000 sec counting time, with Be window inserted
(barely visible peak)
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WDS Analysis
TakeOff 40.0 KiloVolt 20.0 Beam Current
52.0 Beam Size 0
Un 6 std-flex Results in Elemental Weight
Percents ELEM Hg Pb Cr TIME
240.00 240.00 240.00 AVER .09916 -.03815
-.00240 SDEV .07870 .06759 .00271 Detection
limit at 99 Confidence ELEM Hg Pb
Cr AVER .00485 .00551 .00280
990 PPM of Hg easily detected, with 40 PPM
sensitivity 240 sec counting time