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Stability of IAPSO Standard Seawater

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  • 1 Ocean Scientific International Ltd., Petersfield, Hampshire, United Kingdom
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Abstract

A check of the calibration of 10 batches of International Association for the Physical Sciences of the Ocean standard seawater (P120–P129) against the defined KCl standard (practical salinity scale 1978) showed differences of less than 0.001 in salinity (equivalent to circa 0.00003 in K15) during storage periods of up to 96 weeks. An experimental batch stored in borosilicate bottles showed no significant difference from the seawater stored in glass ampoules over a storage period of 158 weeks.

Corresponding author address: Mr. P. S. Ridout, Ocean Scientific International Ltd., South Down House, Station Rd., Petersfield, Hampshire GU32 3ET UK.

Email: paul.ridout@oceanscientific.co.uk

Abstract

A check of the calibration of 10 batches of International Association for the Physical Sciences of the Ocean standard seawater (P120–P129) against the defined KCl standard (practical salinity scale 1978) showed differences of less than 0.001 in salinity (equivalent to circa 0.00003 in K15) during storage periods of up to 96 weeks. An experimental batch stored in borosilicate bottles showed no significant difference from the seawater stored in glass ampoules over a storage period of 158 weeks.

Corresponding author address: Mr. P. S. Ridout, Ocean Scientific International Ltd., South Down House, Station Rd., Petersfield, Hampshire GU32 3ET UK.

Email: paul.ridout@oceanscientific.co.uk

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