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ニスキン 採 水 器 による 一 次 生 産 阻 害
Inhibition of primary production by Niskin sampler
― Original Paper ―
Inhibition of primary production by nitrile rubber O-rings in Niskin sampler
Kazuhiko Matsumoto 1* , Tetsuichi Fujiki 1 , Makio C. Honda 1 , Masahide Wakita 2 ,
Hajime Kawakami 2 , Minoru Kitamura 3 , and Toshiro Saino 1
Seawater sampling was conducted by a CTD system attached with Niskin-X sampler in the R/V Mirai. Niskin-X sampler
can eliminate the contamination of toxic rubber and trace metal in the bottle as much as possible, because its closure spring is arranged
outside of the bottle. Teflon-coated and acid-cleaned samplers of them were usually used for the sampling of primary production as
“clean” Niskin. We tested the difference of primary production between “clean” and other “normal” Niskin sampling. Primary
production estimated from “normal” Niskin sampling was decreased drastically than “clean” Niskin sampling. We tested again to
evaluate the cause of such difference, and it was revealed that the using of nitrile rubber O-rings in the “normal” Niskin sampler
inhibited primary production.
Keywords: Primary production, Niskin sampler, O-ring, toxic rubber, nitrile rubber, Viton rubber
Received 27 June 2011 ; Accepted 7 November 2011
1 Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2 Mutsu Institute for Oceanography, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
3 Institute of Biogeosciences (Biogeos), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
*Corresponding author:
Kazuhiko Matsumoto
Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2-15 Natsushima-cho, Yokosuka 237-0061, Japan
Tel. +81-46-867-9496
matsumotok@jamstec.go.jp
Copyright by Japan Agency for Marine-Earth Science and Technology
18 JAMSTEC Rep. Res. Dev., Volume 14, March 2012, 17 _ 25