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Marine Geochemistry - Laboratory Methods

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Access element methods

Cr - Chromium

sample type

marine porewater
digested sediment 1g/L
groundwater
typical concentration
0.2 µmol/L
10 ppb
2 µmol/L
100 ppb

0.2 µmol/L
10 ppb

Method1 ICP-OES
wavelength 205.552 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 2 GF-AAS
wavelength 357.9 nm
method used
yes
yes
yes
dilution
1:10
1:1000
-
sample size
50 µL
500 µL
500 µL
detction limit
2 ppb
1ppb
0,5 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 3 ICP-MS
Mass 52, 53 -> 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
Multielement standard in nitric acid 1% M4, M6, Kraft ME
Multielement standard in nitric acid 1% M4, M6, Kraft ME
Multielement standard in nitric acid 1% M4, M6, Kraft ME
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