|
Parameter
|
Method
|
IAPSO value
|
Analytical uncertainty
|
||
|---|---|---|---|---|---|
|
Accepted
|
Measured
|
1
 (%)
|
n
|
||
| Alkalinity | Gran titration | 2.33 | 2.34 | 2.2 | 10 |
| Cl (mM) | Titration with AgCl | 559 | 544 | 0.7 | 12 |
| H4 SiO4 (然) | Spectrophotometry |
|
|
0.8 | 5 |
| NH4 (然) | Spectrophotometry |
|
|
|
|
| PO4 (然) | Spectrophotometry |
|
|
BDL |
|
| SO4 (mM) | Ion chromatography | 28.9 | 28.9 | 0.3 | 6 |
| Mg (mM) | ICP-AES | 10.55 | 10.63 | 2.1 | 6 |
| Ca (mM) | ICP-AES | 54.0 | 51.64 | 2.2 | 6 |
| K (mM) | ICP-AES | 10.44 | 10.26 | 4.6 | 6 |
| Na (mM) | ICP-AES |
|
465 | 0.4 | 6 |
| Sr (然) | ICP-AES | 87 | 90 | 5.8 | 6 |
| Ba (然) | ICP-AES |
|
70 | 0.6 | 6 |
| B (然) | ICP-AES | 416 | 546 | 2.9 | 6 |
| Li (然) | ICP-AES | 27 | 21 | 5.4 | 6 |
| Mn (然) | ICP-AES | 0 | 0.6 | 2.6 | 6 |
| Fe (然) | ICP-AES | 0 | BDL | BDL |
|
| DOC (mM) | Gas chromatography |
|
|
9.6 | 3 |
Notes: IAPSO = International Association for the Physical Sciences of the Ocean, standard seawater. BDL = below detection limit. DOC = dissolved organic carbon. ICP-AES = inductively coupled plasma-atomic emission spectroscopy. n = number of replicate analyses. This table is also available in ASCII.