Hg Fluorescence when diluting with Air vs. diluting with Nitrogen

Mercury Fluorescence, Pressure Dependence                                                                                                                                                                                 

for Samples at constant Mixing Ratio

0

1

2

3

4

5

6

7

8

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Sample Chamber Pressure, atmospheres absolute

Relative Fluorescence Intensity

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

Relative Background Signal

Mercury in Nitrogen

Mercury in Air

Raleigh scattering

CEMS MDL = 0.008 microgram/m3

CEMS MDL = 0.040 microgram/m3