3.1 IAPSO Standard Seawater

3. Standardization

Wormley IAPSO seawater ampoules contain standard seawater with a "known" salinity value. The label on the IAPSO vial shows the "Date" on which the IAPSO batch was made, the K_15,2 x K₁₅, and the salinity value. IAPSO ampoules are used as universal standards when measuring salinity samples. Table 6 below shows the IAPSO batches used for HOT cruises 1-157. HOT-21 (November 17-18, 1990, Chief Scientist C. D. Winn) is excluded from this table because the crane on R/V Naina was too long for a safe deployment of the CTD and the cruise was aborted due to increasing seas and gale force winds.

Table 6: IAPSO Batches Used for HOT cruises.
IAPSO Batch #	HOT Cruise #
P103	1
P110	2-12
P111	13-19
P112	20, 22
P114	22-25, 26-31
P115	25, 32-40
P118	41-49, 50-51, 54
P121	49, 52-53, 54-57
P123	58-69
P128	69-80, 86-87
P130	80-85, 87-88
P132	89-100
P134	101-105
P135	104-115
P136	115-125
P138	126-134, 140
P140	135-139, 141-148, 150
P141	149, 151-157

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