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Table AT1. Interstitial water extraction methods tested, Expedition 338.

Experiment Sample Method Sediment
weight (g) 		Sediment condition Solution
1 1-A Squeezing ~200 Untreated whole core None
2-A GRIND 40 Crushed 5 mL 500 ppb In solution
2-B GRIND 40 Crushed 5 mL 500 ppb RLA solution
3-A1 Leaching 4 Dried in air at 110°C and powdered 40 mL Milli-Q water
3-A2 Leaching 4 Dried in vacuum and powdered 40 mL Milli-Q water
3-B1 Leaching 4 Not treated 40 mL Milli-Q water
3-B2 Leaching 4 Not treated 40 mL 20 µM CH3COONH4 solution
3-B3 Leaching 4 Not treated 40 mL 100 µM CH3COONH4 solution
2 1-B Squeezing ~200 Untreated whole core None
2-C GRIND 80 Crushed 10 g Milli-Q water
2-D GRIND 80 Crushed 10 g 20 µM CH3COONH4 solution
2-E GRIND 80 Crushed 10 g pH 3 diluted HNO3 solution
2-F GRIND 80 Crushed 10 g pH 5 diluted HNO3 solution

GRIND = ground rock interstitial normative determination.

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