Table 2. Composition of standard solutions.
|
Standard (Std) |
Concentration (µg/l) |
Stock solution (ml) |
5% Nitric acid (ml) |
|
Std 1 |
1 |
0.01 |
9.99 |
|
Std 2 |
4 |
0.04 |
9.96 |
|
Std 3 |
20 |
0.2 |
9.98 |
|
Std 4 |
100 |
1 |
9 |
|
Std 5 |
300 |
3 |
7 |
|
Std 6 |
500 |
5 |
5 |
|
Std Blank |
0 |
0 |
5 |