Parallel-Plate Wet Denuder Coupled Ion Chromatograph for Near-Real-Time Detection of Trace Acidic Gases in Clean Room Air

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  • TAKEUCHI Masaki
    Institute of Health Biosciences, The University of Tokushima Graduate School
  • TSUNODA Hiromichi
    Graduate School of Pharmaceutical Sciences, The University of Tokushima
  • TANAKA Hideji
    Institute of Health Biosciences, The University of Tokushima Graduate School
  • SHIRAMIZU Yoshimi
    Process Module & Integration Engineering Department, Renesas Electronics Co.

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説明

This paper describes the performance of our automated acidic (CH3COOH, HCOOH, HCl, HNO2, SO2, and HNO3) gases monitor utilizing a parallel-plate wet denuder (PPWD). The PPWD quantitatively collects gaseous contaminants at a high sample flow rate (∼8 dm3 min−1) compared to the conventional methods used in a clean room. Rapid response to any variability in the sample concentration enables near-real-time monitoring. In the developed monitor, the analyte collected with the PPWD is pumped into one of two preconcentration columns for 15 min, and determined by means of ion chromatography. While one preconcentration column is used for chromatographic separation, the other is used for loading the sample solution. The system allows continuous monitoring of the common acidic gases in an advanced semiconductor manufacturing clean room.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 27 (8), 805-, 2011

    社団法人 日本分析化学会

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