Table T9. Interstitial water analyses and budget, Expedition 346.
| Analytes | Method | Model of instrument | IW volume (mL) |
Priority |
|---|---|---|---|---|
| Salinity | Digital refractometer | Index Instruments Ltd. | 0.1 | H |
| pH | Gran titration | Brinkman pH electrode Metrohm 794 basic Titrino autotitrator | 3 | H |
| Alkalinity | ||||
| Cl– | Titration against silver nitrate | Metrohm 785 DMP Titrino autotitrator | 0.1 | H |
| SO42– | Ion chromatography | Metrohm 850 professional ion chromatograph | 0.1 | H |
| Br– | ||||
| Cl– | ||||
| Ca | ICP-AES/Ion chromatography | Teledyne Prodigy high-dispersion ICP-AES/Metrohm 850 professional ion chromatograph | 4 | H |
| K | ||||
| Mg | ||||
| Na | ||||
| Ba | ICP-AES | Teledyne Prodigy high-dispersion ICP-AES | ||
| B | ||||
| Fe | ||||
| Li | ||||
| Mn | ||||
| Si | ||||
| Sr | ||||
| NH4+ | Spectrophotometry | Agilent Cary 100 UV-VIS spectrophotometer | 3 | H |
| PO43– | ||||
| H4SiO4– | ||||
| HS– | 1 | H* | ||
| Yellowness | 1 | H* | ||
| Isotopes (Mg, K, Ca) | Shore-based water requirements | 5 | M | |
| δ34S | 5 | M | ||
| δ13C | 5 | M | ||
| Archive IW | 5 | L |
ICP-AES = inductively coupled plasma–atomic emission spectroscopy. IW = interstitial water. UV-VIS = ultraviolet-visible. H = high priority, H* = high priority in shallow sediment of gas-rich sequences, M = medium priority, L = low priority.
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