|
sample type |
marine
porewater
|
digested
sediment 1g/L
|
groundwater
|
| typical concentration |
1 µmol/L
50 ppb |
1 mmol/L
50 ppm |
100 µmol/L |
| Method1 | photometric detection | ||
| wavelength | 565 nm | ||
|
method used
|
yes
|
no
|
no
|
| dilution |
|
|
|
| sample size |
1
mL
|
|
|
| detction limit |
20
ppb
|
|
|
| standard solutions |
Single
element standard
|
|
|
| Method2 | ICP-OES | ||
| wavelength | 259.940 nm -> wavelength table | ||
|
method used
|
no
|
yes
|
no
|
| dilution |
|
-
|
|
| sample size |
|
>
2 mL
|
|
| detction limit |
|
20
ppb
|
|
| standard solutions |
|
Single
element standard in nitric acid 1%
|
|
| Method 3 | GF-AAS | ||
| wavelength | 248.3 nm | ||
|
method used
|
yes
|
yes
|
yes
|
| dilution |
1:10
|
-
|
-
|
| sample size |
>
100 µL
|
>
100 µL
|
>
100 µL
|
| detction limit |
1
ppb
|
1ppb
|
1
ppb
|
| standard solutions |
Single
element standard in nitric acid 1%
|
Single
element standard in nitric acid 1%
|
Single
element standard in nitric acid 1%
|
| Method 4 | ICP-MS | ||
| Mass | 56, 57 -> Mass Table | ||
|
method used
|
yes
|
yes
|
yes
|
| dilution |
1:100
|
1:10
|
1:10
|
| sample size |
>
1 mL
|
>
1 mL
|
>
1mL
|
| detction limit |
10
ppb
|
1
ppb
|
1
ppb
|
| standard solutions | |||
| tips + tricks | ICP-OES 234.349nm line is interfered by Ca line | ||