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Sains Malaysiana
40(1)(2011): 67–70
ZnO
Gas Sensor for Testing Vinegar Acid Concentrations
(Penderia
Gas ZnO untuk Menentukan Kepekatan Asid dalam Cuka)
N. Al-Hardan*, M.J. Abdullah, A. Abdul Aziz
& H. Ahmad
School
of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia
Diserahkan:
7 Disember 2009 / Diterima: 15 Julai 2010
ABSTRACT
A ZnO gas sensor was
successfully prepared by RF sputtering. The maximum sensitivity
of the sensor for vinegar test application was at 400oC.
The ZnO based sensor showed good sensitivity for vinegar test in the
concentration range of 4% to 9%. The work reveals the ability of using ZnO gas
sensor to determine the acid concentrations of the vinegars for food
requirements.
Keywords: Electrical
conductivity; gas sensors; ZnO thin films
ABSTRAK
Penderia gas ZnO telah
berjaya dihasilkan dengan percikan RF. Kepekaan maksimum penderia
untuk penggunaan dalam pengujian cuka ialah pada 400oC.
Penderia berasaskan ZnO menunjukkan kepekaan yang baik untuk pengujian cuka
dalam julat kepekatan 4% hingga 9%. Kajian ini menunjukkan keupayaan penderia
gas ZnO untuk menentukan kepekatan asid cuka bagi keperluan dalam makanan.
Kata kunci:
Kekonduksian elektrik; penderia gas; film nipis ZnO
RUJUKAN
Al-Hardan,
N., Abdullah M.J. & Aziz A.A. 2009. The gas response enhancement from ZnO
film for H2 gas
detection. Applied Surface Science 255: 7794-7797.
Castro,
R., Moreno M., Natera R., García-Rowe F., Hernández M. & Barroso C. 2002.
Comparative analysis of the organic acid content of vinegar by capillary
electrophoresis and ion-exclusion chromatography with conductimetric detection. Chromatographia 56: 57-61.
Funazaki,
N., Hemmi A., Ito S., Asano Y., Yano Y., Miura N. & Yamazoe N. 1995.
Application of semiconductor gas sensor to quality control of meat freshness in
food industry. Sensors and Actuators B: Chemical 25: 797-800.
Hellegouarc’h,
F., Arefi-Khonsari F., Planade R. & Amouroux J. 2001. PECVD prepared SnO2 thin
films for ethanol sensors. Sensors and Actuators B: Chemical 73: 27-34.
Jagadish,
C. & Pearton S. (Eds). 2006. Zinc oxide bulk, thin films and
nanostructures. Processing, Properties, and Applications, London:
Elsevier.
Johnston,
C.S. & Gaas C.A. 2006. Vinegar: Medicinal uses and antiglycemic effect. MedGenMed.
8: 61.
Kim,
Y.S., Ha S.-C., Yang H. & Kim Y.T. 2007. Gas sensor measurement system
capable of sampling volatile organic compounds (VOCs) in wide concentration
range. Sensors and Actuators B: Chemical 122: 211-218.
Lenghor, N.,
Jakmunee J., Vilen M., Sara R., Christian G.D. & Grudpan K. 2002.
Sequential injection redox or acid-base titration for determination of ascorbic
acid or acetic acid. Talanta 58: 1139-1144.
Morkoç, H. &
Ozgur U. 2009. Zinc oxide. Fundamentals, Materials and Device Technology.
Weinheim: Wiley-VCH.
Moros, J., Iñón
F. A., Garrigues S. & de la Guardia M. 2008. Determination of vinegar
acidity by attenuated total reflectance infrared measurements through the use
of second-order absorbance-pH matrices and parallel factor analysis. Talanta 74: 632-641.
Steine, C.,
Beaucousin F., Siv C. & Peiffer G. 2001. Potential of semiconductor sensor
arrays for the origin authentication of pure valencia orange juices. Journal
of Agricultural and Food Chemistry 49: 3151-3160.
Xiaobo, Z.,
Jiewen Z., Shouyi W. & Xingyi H. 2003. Vinegar classification based on
feature extraction and selection from tin oxide gas sensor array data. Sensors 3: 101-109.
*Pengarang untuk surat-menyurat; email: naif.zd06@student.usm.my
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