Chemistry Reference
In-Depth Information
(1) mass of resin (g)
0.0
0.1
0.2
0.3
0.4
6
5
(1)
(2)
4
ε
x 10
−
5
3
2
1
0
0
5
10
15
20
25
30
35
(2) 1/mass of resin (1/g)
Figure 12.1
UV-SPMS batch procedure for thiamine. Dependence of molar absorptivity coefficient on amount
of resin: (1) mass of solid phase; (2) 1/mass of solid phase. Reprinted from [9]. © 1998 American Chemical
Society.
A
1
0.8
0.6
0.4
0.2
0
0
0.5
1
1.5
2
2.5
Volume of sample (I)
Figure 12.2
Influence of the sample volume on signal development in a Vis-SPMS batch procedure for
vanadium (V). Reproduced from [10] with permission from Elsevier, © 1995.
An example of the effect of the sample volume on sensitivity can be observed in Figure 12.2 [10]. This
experimental data is consistent with Equation (12.6). Sensitivity is increased about one order of magnitude
when sample volume increases from 10 to 1000 ml. Note that the observed plateau is due to the need of
drastically increasing equilibration time with sample volumes higher than 1 l.
