Usually, sandall index or sensitivity are measured by dividing Molecular weight of active species (g.mol-1) by molar absorptivity (L.mol-1. cm-1).
My question is how the final unite are equal to (µg/cm2/0.001 Abs unit)?
Eslam Hamed
Sandell's sensitivity is the lowest concentration in ppm ( µg/cm3) which results in an absorbance of 0.001 in a 1.0 cm path length.
It can be calculated according to the following equation:
[ 0.001 x 1(cm) ] / slope (cm3/ µg)
notice the units and you will find that the final result is µg /cm2
Or
with your method, you can convert 1L to 1000 cm3. and you will get the same result
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Umesh B. Barache
It is the lowest concentration in ppm ( µg/cm3) which results in an absorbance of 0.001 in a 10 mm path length.
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