Abstract

A photoacoustic (PA) spectrometer with H-type first longitudinal resonant cells for ammonia detection is developed. A new PA cell structure is designed to accelerate the drift velocity of the sample gas near the cell surface, so that the short response time at the flow rate of 100 sccm (standard cubic centimeter per minute) is achieved. The response time of 5 min and detection limit of 0.86 ppbv is reached for ammonia concentration measurement with a Teflon polytetrafluoroethylene (PTFE) cell. Further improvement could be expected when using a brass cell with a high quality Teflon fluorinated ethylene propylene (FEP) coating.

© 2007 Chinese Optics Letters

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2005 (1)

M. W. Sigrist and C. Fischer, J. Phys. IV France 125, 619 (2005).

2004 (2)

S. Schilt, L. Thevenaz, M. Nikles, L. Emmenegger, and C. Huglin, Spectrochimica Acta Part A 60, 3259 (2004).

A. A. Kosterev and F. K. Tittel, Appl. Opt. 43, 6213 (2004).

2003 (2)

S. Li, Q. Yu, M. van Herpen, S. te L. Hekkert, and F. J. M. Harren, Chin. Opt. Lett. 1, 361 (2003).

X. Yang, Q. Yu, and S. Li, J. Optoelectronics Laser (in Chinese) 14, 163 (2003).

2002 (1)

C. Kumar and N. Patel, Gases and Technology 1, 24 (2002).

2001 (1)

1997 (1)

1995 (1)

H. S. M. De Vries, F. J. M. Harren, G. P. Wyers, R. P. Otjes, J. Slanina, and J. Reuss, Atmosphere Environment 29, 1069 (1995).

1990 (1)

Appl. Opt. (4)

Atmosphere Environment (1)

H. S. M. De Vries, F. J. M. Harren, G. P. Wyers, R. P. Otjes, J. Slanina, and J. Reuss, Atmosphere Environment 29, 1069 (1995).

Chin. Opt. Lett. (1)

Gases and Technology (1)

C. Kumar and N. Patel, Gases and Technology 1, 24 (2002).

J. Optoelectronics Laser (in Chinese) (1)

X. Yang, Q. Yu, and S. Li, J. Optoelectronics Laser (in Chinese) 14, 163 (2003).

J. Phys. IV France (1)

M. W. Sigrist and C. Fischer, J. Phys. IV France 125, 619 (2005).

Spectrochimica Acta Part A (1)

S. Schilt, L. Thevenaz, M. Nikles, L. Emmenegger, and C. Huglin, Spectrochimica Acta Part A 60, 3259 (2004).

Other (2)

J. F. Nunn, Applied Respiratory Physiology (in Chinese) Y. H. Chen (translated) (Science Press, Beijing, 1983) p.213.

F. J. M. Harren, G. Cotti, J. Oomens, and S. te L. Hekkert, in Encyclopedia of Analytical Chemistry R. A. Meyers (ed.) (Wiley, New York, 2000) p.2203.

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