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2. Recent Trends in Electrochemical Detection of NH3, H2S and NOx Gases
3. www.citytech.com(Accessed on May 16 2019)
4. www.winsen‐sensor.com(Accessed on May 16 2019)
5. VDI 3869 Measurement of Ammonia in Ambient Air – Sampling with Diffusion Separators (Denuders) – Photometric or Ion Chromatographic Analysis VDI guideline Verein Deutscher Ingenieure Düsseldorf2010.