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Journal of Central South University of Technology

, Volume 14, Issue 6, pp 820–825 | Cite as

Concentrated and gastight sampling technique of deepsea microplankton

  • Huang Zhong-hua  (黄中华)Email author
  • Liu Shao-jun  (刘少军)
  • Jin Bo  (金 波)
  • Li Li  (李 力)
  • Chen Ying  (陈 鹰)
Article
  • 40 Downloads

Abstract

A new sampling method of deepsea microplankton with function of in-situ concentrated sampling and gastight sampling was proposed. In-situ concentrated sampling technique was realized as follows: a microplankton membrane was used as filtration membrane, and a deepsea pump was used to pump seawater; the microplankton was captured and the density of microplankton was increased when seawater flow through the filtration membrane. Gastight sampling technique was realized as follows: a precharged accumulator was used as pressure compensator. During the process of lifting the sampler, the accumulator compensated the pressure drop continuously. The laboratory experimental results show that with in-situ concentrated sampling technique, in-situ concentrated sampling can be realized and the maximum concentration ratio reaches up to 500. With pressure compensation technique based on accumulator, gastight sampling can be realized. When sampling at 6 km and the precharge pressure of accumulator is 18 MPa, pressure drop of the sample is less than 2% compared with its original pressure. Deepsea experiment (at 1.9 km) results show that the sampler can realize in-situ concentrated sampling and gastight sampling.

Key words

sampler concentrated sampling gastight sampling deepsea microplankton 

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Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Huang Zhong-hua  (黄中华)
    • 1
    Email author
  • Liu Shao-jun  (刘少军)
    • 1
  • Jin Bo  (金 波)
    • 2
  • Li Li  (李 力)
    • 1
  • Chen Ying  (陈 鹰)
    • 2
  1. 1.School of Mechanical and Electrical EngineeringCentral South UniversityChangshaChina
  2. 2.National Key Laboratory of Fluid Power Transmission and ControlZhejiang UniversityHangzhouChina

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