Performance evaluation of an electrometer system for ion and aerosol charge measurements

Panich Intra; Nakorn Tippayawong

Korean Journal of Chemical Engineering, Vol.28, No.2, 527-530, February, 2011

DOI10.1007/s11814-010-0378-1 Export Citation

Performance evaluation of an electrometer system for ion and aerosol charge measurements

Panich Intra^†, and Nakorn Tippayawong¹

College of Integrated Science and Technology, Rajamangala University of Technology Lanna, Chiang Mai 50300, Thailand
¹Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand

E-mail:

An aerosol electrometer system for measuring ion and aerosol charge using electrostatic detection technique was developed and presented. It consists of a size-selective inlet, a particle charger, an ion trap, a Faraday cup, an electrometer, and a data acquisition and processing system. In this system, an aerosol sample first passes through the size-selective inlet to remove particles outside the measurement size range based on their aerodynamic diameter, and then passes through the unipolar corona charger that sets a charge on the particles and enters the ion trap to remove the free ions. After the ion trap, the charged particles then enter the Faraday cup electrometer for measuring ultra low current of about 1 pA induced by ion and aerosol charge collected on the filter in Faraday cup corresponding to the number concentration of ion and aerosol. Signal current is then recorded and processed by a data acquisition system. Finally, the detailed description of the operating principle of the system as well as the preliminary experimental testing results of ion and aerosol charge measurements were also introduced and discussed.

Keywords:Aerosol;Ion;Faraday Cup;Electrometer

[References]

Hinds WC, Aerosol technology, John Wiley & Sons, New York, USA (1999)
Intra P, Tippayawong N, Mj. Int. J. Sci. Technol., 1, 120 (2007)
Johnson T, Kaufman S, Medved A, 6th Int. ETH Conference Nanoparticle Measurement, Zurich, Switzerland, 19-21 August (2002)
Wei J, Development of a method for measuring surface area concentration of ultrafine particles, D. Eng. Thesis, University of Duisburg -Essen, Germany (2007)
Intra P, Tippayawong N, J. Japan Soc. Applied Electromagnet. Mech., 17, s17 (2009)
Kim JK, Kim SC, Korean J. Chem. Eng., 18(4), 531 (2001)
Murtomaa M, Pekkala P, Kalliohaka T, Paasi J, J. Electrostat., 63, 571 (2005)
J-Fatokun FO, Morawska L, Jamriska M, Jayaratne ER, Atmos. Environ., 42, 8827 (2008)
Li L, Chen DR, Tsai PJ, J. Electrostat., 67, 765 (2009)
Li L, Chen DR, Tsai PJ, J. Nanopart. Res., 11, 111 (2009)
TSI Incorporated, Instruction Manual for Electrical Aerosol Detector Model 3070A, Minnesota, USA (2002)
Agrawal JK, Sem GJ, J. Aerosol Sci., 11, 343 (1980)
TSI Incorporated, Instruction Manual for Condensation Particle Counter Model 3010, Minnesota, USA (2002)
Intra P, CMU. J. Nat. Sci., 7, 257 (2008)
Intra P, Tippayawong N, Chiang Mai J. Sci., 36, 110 (2009)
Intra P, Tippayawong N, 7th PSU-Engineering Conference., Songkla, Thailand, 21-22 May (2009)
Intra P, Tippayawong N, CMU. J. Nat. Sci., 6, 313 (2007)
Intra P, Tippayawong N, J. Electrostat., DOI: 10.1016/j.elstat.2010.01.008. (2010)
Cleary TG, Mulholland GW, Ives LK, Fletcher RA, Gentry JW, Aerosol Sci. Technol., 16, 166 (1992)
Intra P, Tippayawong N, Korean J. Chem. Eng., 26(6), 1770 (2009)

[1] Hinds WC, Aerosol technology, John Wiley & Sons, New York, USA (1999)

[2] Intra P, Tippayawong N, Mj. Int. J. Sci. Technol., 1, 120 (2007)

[3] Johnson T, Kaufman S, Medved A, 6th Int. ETH Conference Nanoparticle Measurement, Zurich, Switzerland, 19-21 August (2002)

[4] Wei J, Development of a method for measuring surface area concentration of ultrafine particles, D. Eng. Thesis, University of Duisburg -Essen, Germany (2007)

[5] Intra P, Tippayawong N, J. Japan Soc. Applied Electromagnet. Mech., 17, s17 (2009)

[6] Kim JK, Kim SC, Korean J. Chem. Eng., 18(4), 531 (2001)

[7] Murtomaa M, Pekkala P, Kalliohaka T, Paasi J, J. Electrostat., 63, 571 (2005)

[8] J-Fatokun FO, Morawska L, Jamriska M, Jayaratne ER, Atmos. Environ., 42, 8827 (2008)

[9] Li L, Chen DR, Tsai PJ, J. Electrostat., 67, 765 (2009)

[10] Li L, Chen DR, Tsai PJ, J. Nanopart. Res., 11, 111 (2009)

[11] TSI Incorporated, Instruction Manual for Electrical Aerosol Detector Model 3070A, Minnesota, USA (2002)

[12] Agrawal JK, Sem GJ, J. Aerosol Sci., 11, 343 (1980)

[13] TSI Incorporated, Instruction Manual for Condensation Particle Counter Model 3010, Minnesota, USA (2002)

[14] Intra P, CMU. J. Nat. Sci., 7, 257 (2008)

[15] Intra P, Tippayawong N, Chiang Mai J. Sci., 36, 110 (2009)

[16] Intra P, Tippayawong N, 7th PSU-Engineering Conference., Songkla, Thailand, 21-22 May (2009)

[17] Intra P, Tippayawong N, CMU. J. Nat. Sci., 6, 313 (2007)

[18] Intra P, Tippayawong N, J. Electrostat., DOI: 10.1016/j.elstat.2010.01.008. (2010)

[19] Cleary TG, Mulholland GW, Ives LK, Fletcher RA, Gentry JW, Aerosol Sci. Technol., 16, 166 (1992)

[20] Intra P, Tippayawong N, Korean J. Chem. Eng., 26(6), 1770 (2009)