|
Priority (if IW is limited)
|
Amount
required
(mL)
|
Splitting and preparation
|
|
ICP-AES major elements
|
0.1
|
2.5 mL IW into 5 mL cryovial, add 10 mL HNO3 concentrated (include IW split for onshore trace metals analysis)
|
|
ICP-AES minor elements
|
0.5
|
|
IC
|
0.1
|
5 mL IW into 5 mL cryovial, store in fridge until respective analysis
|
|
Phosphate (photometric)
|
0.3
|
|
Ammonium (photometric)
|
0.1
|
|
Chlorinity (titration)
|
0.5
|
|
Alkalinity/pH (titration)
|
3
|
3 mL into 5 mL cryovial, titrate fast after squeezing
|
IW splits (onshore: δ18O,
chlorinity, silica)
|
2–12
|
2–12 mL in 2–6 mL cryovials, freeze/cool (depending on onshore analysis)
|
|
|
IW splits (onshore: DIC,
Ca/Sr/S isotopes)
|
2–12
|
2–12 mL into 2–6 mL (cryo)vials, cool, DIC sample toxified with HgCl2
|
|
|
IW = interstitial water, ICP-AES = inductively coupled plasma–atomic emission spectroscopy, IC = ion chromatograph, DIC = dissolved inorganic carbon.