Development of an Automatic Terpene Gas Sampling System for Flux Measurement

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  • NOZOE Susumu
    United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology
  • TANI Akira
    School of High-Technology for Human Welfare, Tokai University

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  • フラックス測定用テルペンガス自動濃縮採取装置の開発と性能評価
  • フラックス ソクテイヨウ テルペンガス ジドウ ノウシュク サイシュ ソウチ ノ カイハツ ト セイノウ ヒョウカ

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Abstract

An automatic terpene gas sampling system was developed to obtain the terpene concentration gradient for flux determination. The system can collect terpene gases from two different sampling lines into different adsorbent tubes simultaneously. Eighteen adsorbent tubes can be set in this system. The holder of adsorbent tubes can be cooled or heated for keeping the tube temperatures constant, which can prevent change in adsorption efficiency of adsorbents affected by tube temperature. Adsorbent tubes can be changed by electrically actuated multiposition valves. Results of performance tests showed that there were no emissions of trace contaminants from the inside of sampling lines. The automatically sampling errors were lower than manual sampling errors. This means that automation of sampling is beneficial for lowering errors. The temperature of the 16 adsorbent tubes in the holder could be kept uniform. These performance tests showed that the system could be successfully used for terpene flux measurements above a plant canopy.

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