S. Janssen^1,2,3, K. Schmitt⁶, M. Blanke⁵,M. L. Bauersfeld⁶, J. Wöllenstein^4,6 andW. Lang^1,2,3
¹Institute for Microsensors, -actuators and -systems (IMSAS), University of Bremen, Otto-Hahn-Allee NW1, Bremen 28359, Germany
²Microsystems Center Bremen (MCB), Bremen, Germany
³Bremen Research Cluster for Dynamics in Logistics (LogDynamics), Bremen, Germany
⁴Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany
⁵INRES—Horticultural Science, University of Bonn, Bonn, Germany
⁶Fraunhofer Institute for Physical Measurement Techniques (IPM), Freiburg, Germany

Abstract

Ethylene is a gaseous ripening phytohormone of fruits and plants. Presently, ethylene is primarily measured with stationary equipment in laboratories.
Applying in situ measurement at the point of natural ethylene generation has been hampered by the lack of portable units designed to detect
ethylene at necessary resolutions of a few parts per billion. Moreover, high humidity inside controlled atmosphere stores or containers complicates the
realization of gas sensing systems that are sufficiently sensitive, reliable, robust and cost efficient. In particular, three measurement principles have shown promising potential for fruit supply chains and were used to develop independent devices: nondispersive infrared spectroscopy, miniaturized gas
chromatography and electrochemical measurement. In this paper, the measurement systems for ethylene are compared with regard to the needs in fruit
logistics; i.e. sensitivity, selectivity, long-term stability, facilitation of automated measurement and suitability for application. Resolutions of 20–10 ppb can be achieved in applications with state-of-theart equipment, operating with the three methods described in the following.

乙烯是一種水果和植物的氣體催熟激素。目前，乙烯主要是在實驗室用固定設備進行測定的。由于缺乏用于檢測的便攜式裝置，在天然乙烯生產點進行現場測量受到阻礙。
乙烯的必要分辨率為十億分之幾。此外，受控大氣存儲或容器內的高濕度對傳感器較為敏感、可靠、穩健和經濟高效的氣體傳感系統。尤其是，三種測量原理顯示了水果供應鏈的潛在潛力，并被用于開發獨立的移動設備：非色散紅外光譜、小型化氣體。色譜和電化學測量。本文根據水果生產的需要，對乙烯測定系統進行了比較物流；即敏感性、選擇性、長期穩定性、自動化測量的便利性和移動應用的適用性。分辨率為20–10 ppb，可在移動應用程序中通過RT設備狀態實現，操作方法如下所述。

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水果供應鏈中乙烯的檢測方法

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