A deep-sea mass spectrometer for in situ dissolved gases detection (IMAGE)
Caption
The deep-sea mass spectrometer uses 24 V DC power and has an average power consumption of less than 60 W during operation and less than 10 W during standby. Its physical size is φ240 mm×1300 mm, with a core mass of 14.2 kg. The detectable mass range is 1–200 Da, with a mass resolution of less than 1 Da and the scanning time for a single mass is less than 15 ms. The detection limits for dissolved N2, O2, Ar, and CO2 under atmospheric pressure are 0.021 μg/L, 0.068 μg/L, 0.017 μg/L, and 0.014 μg/L. The deep-sea mass spectrometer operated continuously and stably for more than 8 h under a simulated water depth of 5800 m, and it also achieved continuous online detection for 25.8 h in the sea area of −1388 m depth in the South China Sea, obtaining dissolved gas concentration-time and depth-concentration curves. Art by Chen’s group.
Credit
Beijing Zhongke Journal Publising Co. Ltd.
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License
CC BY