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    Aero AL2021德國Aero AL2021過氧化氫分析儀、空氣在線監測儀原版手冊

    AL2021型過氧化氫(H2O2)分析儀具有非同尋常的高靈敏度和獨特的低檢測限,<100ppt的氣態樣品和<100ng/l(3×10-9molar)的液體樣品分析。完整的化學處理,包括氣體剝離,集成到
    下載次數:148 瀏覽次數:468發布時間:2016-04-20 17:42
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    文檔詳情

    The H O monitor AL2021 from Aero-Laser has an extraordinary high sensitivity and a unique low detection limit of

    100ppt (parts per trillion) for gaseous samples and 100 ng/liter (eq. 2×10 molar) for liquid samples, respectively.

    The complete chemical processing, including gas stripping, is integrated into the instrument.

    The detection technique is based on an enzymatic peroxidise reaction, which is not only sensitive for , but also

    for other peroxides. Hence, after stripping the sample gas, the aqueous solution is separated in two channels. In

    channel A the concentration of all peroxides is measured, while is selectively destroyed by the

    enzyme catalase. The absolute concentration of is further calculated from the difference of the signals of both

    channels. These signals are obtained by exciting the products of the peroxidase reactions with UV light and

    detecting the fluorescent light by photomultipliers. With this method an extraordinary selectivity is achieved,

    avoiding interferences from other substances. The AL2021 is the only instrument worldwide providing continuous

    concentrations of in the range around and below 1ppb.

    The AL2021 was originally developed for environmental and climate research and is employed worldwide in

    atmospheric monitoring stations. Since is getting more and more important in the field of sterilisation and

    decontamination, the instrument is widely used by the pharmaceutical industry for controlling of the atmosphere

    inside filling systems.

    2 2

    -9

    [1] A.L. Lazrus, G.L. Kok, S.N. Gitlin, J.A. Lind, S.E. McLaren,

    ,Anal. Chem. 57 (1985) 917

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