Initial Reports Volume 185 Chapter 3, Table T21. WSTP aliquot distribution. Note: WSTP = water sampling temperature pressure tool. Aliquot Volume Analysis (mL) Coil reservoir: 1 3 Culture 2 15 DNA extraction 3 2 Isotope Overflow reservoir: 4 40 DNA extraction 5 30 Microbial counts 6 8 Shipboard chemistry (alkalinity, pH, Ca, Mg, SiO2, NH4, PO4, Na, K, Cl) 7 5 Trace metals 8 5 delta18O, deltaD 9 5 delta13C 10 25 Tritium 11 125 14C 12 17 Archive under pressure 13 50 Headspace gas