Table T4. Prioritized list of sample splits and geochemical determinations and methods used during Expedition 310.
Priority | Split | Volume (mL) |
Preservative | Vial | ||
---|---|---|---|---|---|---|
Type and concentration |
Volume (µL) |
Type and size | Material | |||
1 | pH, alkalinity | 1.00 | HCl s.p. 0.01 n | Varies | 2 mL Eppendorf cup | Polypropylene |
2 | Ammonia | 0.4 | — | — | Direct Injection | Hamilton 1 mL glass syringe |
3 | Anions, archive | 2–5 | — | — | 5 mL ampule | Glass |
4 | Cations | 2–5 | HNO3 s.p. 65% | 100 | 5 mL ampule | Glass |
5 | 13C | 2, no HS | HgCl2 0.25 M | 30 | 2 mL crimp cap | Glass |
6 | Sulfide | 2.00 | ZnAc 50 mM | 500 | 8 mL twist cap | Glass |
7 | 18O | 8, no HS | — | — | 8 mL twist cap | Glass |
8 | DIC, archive | 5 | HCl 30% | 100 | 5 mL ampule | Glass |
9 | Archive | Varies | — | — | 20 mL scintillation | Polypropylene |
Notes: 1 = highest priority, 9 = lowest priority. DIC = dissolved inorganic carbon. HS = headspace. ZnAc = Zn(H2C3O2)2. s.p. = suprapure.
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