Page 81 - Pharmaceutical Analytical Chemistry III
P. 81
At the matching point
Intensity of the color intensity of the color
In sample tube in standard tube
1C1l1 (sample) = 2C2l2
(standard)
1 = 2 for the same substance
C2l2
C1 (sample) = _____________
l1
l1 & l2 are the remaining volume in the Nessler's tubes
of the sample and standard, respectively.
Expression of results :Parts per million (ppm), milligrams per
litre (mg/l) or micrograms per milliliter (mg/ml).
