Dr Goh Joo Kheng, Emily

Lecturer

PhD (University Putra Malaysia, Malaysia)

Telephone: +603-5514 6108
Fax: +603-5514 6364
E-mail: goh.joo.kheng@artsci.monash.edu.my

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Area of Expertise
Research Interest
Selected Journals
Current Research Projects
Prospective Research Projects
Research Students
Research Assistants
Plenary/Keynote Lectures

Electroanalytical chemistry

Current research interests include fabrication and characterization of chemical sensors (chemically modified electrode) and biosensors using voltammetric techniques for the detection of biochemical compounds such as amino acids, vitamins and antioxidant compounds. The fabrication of chemical sensors using conductor or superconductor compounds such as carbon nanotube, magnesium diboride, fullerenes, fullerene derivatives and the fabrication of biosensors using protein enzymes will be of interest. The feasibility of the fabricated modified electrodes will be assessed in samples such as food, beverages and drugs.

Other research interest includes the field of natural product such as extraction of bioactive compounds (i.e. antimicrobial, anti-cancer and/or antioxidant compounds) from plant materials of Guttiferae and Citrus families in Malaysia.

Ee GCL, Ng SH, Goh JK, Sukari MA, Rahmani M (2008) Chemical Constituents of Garcinia parvifolia (Guttiferae). Malaysian Journal of Science, Electronic Journal of University Malaya (In press)

Zhang J, Goh JK, Tan WT, Bond AM (2006) Mechanistic analysis of the electrocatalytic properties of dissolved α and β isomers of [SiW 12O 40] 4 - and solid [Ru(bipy) 3] 2[α-SiW 12O 40] on the reduction of nitrite in acidic aqueous media. Inorganic Chemistry 45: 3732-3740

Tan WT, Bond AM, Lim EB, Goh JK (2005) Voltammetric studies of microcrystalline C 60 adhered to a carbon electrode surface and placed in contact with aqueous electrolyte containing K +. Journal of Solid State Electrochemistry 9: 30-42

Tan WT, Bond AM, Ngooi SW, Lim EB, Goh JK (2003) Electrochemical oxidation of L-cysteine mediated by a C 60-fullerene modified electrode. Analytica Chimica Acta 491:181-191

• Fabrication and of chemical sensor using single-walled and multiple-walled carbon nanotubes to detect the presence of antioxidant compounds in beverages and drugs using voltammetric technique.
• Extraction of bioactive compounds and identification of its chemical constituent from plants of Guttiferae or Citrus families and also some ornamental herbs found in Malaysia.

Future research projects include the voltammetric determination of antioxidant compounds in samples such as food, beverages or drugs using chemically modified electrode to improve its selectivity and sensitivity. Fabrication of biosensor using the similar approach as above is also of interest. The findings could be extended and applied in the construction of a portable detection kit.

The extraction of bioactive compounds and determination of chemical constituents in medicinal plants or ornamental herbs of Malaysia will be of interest.

Honours students ( Present)

Daesi Loh Sing Ying (2008 to date). Determination of Gallic acid in beverages using carbon electrode.
Honours students ( Past)
Tan Yang Tze (completed in 2007). Voltammetric determination of methionine using carbon nanotube modified electrode.
Lim Fei Tieng (completed in 2007). The detection of ascorbic acid using carbon nanotube electrode sensor.
Postgraduate students ( Present )

1. Chew Yik Ling (2008 to date). Bioactivity and chemical constituents of selected ornamental herbs in Malaysia.
2. How Kah Yan (co-supervision) (2007 to date). The molecular characterization of fibroblast-activating factor in prophyromonas gingivalis.

Tan Yang Tze is currently pursuing on the characterization of carbon nanotube modified electrode in the presence of amino acids such as methionine and gluthathione. We are also looking at any possible interference that would occur in this system.

Plenary Lecture

Goh JK, Lim FT (2007) Voltammetric Detection of Ascorbic Acid using Carbon Nanotubes Modified Basal Plane Pyrolytic Graphite (BPPG) Electrode. Poster presentation at the Malaysian Analytical Chemistry Seminar at 12 th Asian Chemical Congress, 23 – 25 August 2007, Putra World Trade Center Malaysia, p 434

Ng SH, Ee GCL, Goh JK, Sukari MA (2006) Chemical constituents and larvicidal activity of Garcinia Parvifolia (Guttiferae). In: The proceeding of 1 st Penang International Conference for Young Chemists, 24-27 May 2006, Universiti Sains Malaysia, pp 80-89

Goh JK, Tan WT (2006) Electro-oxidation of L-cysteine catalyzed by tetrathiafulvalene, ttf-modified glassy carbon electrode. In: National Seminar on Science Technology & Social Sciences 2006, 30-31 May 2006, Universiti Teknologi Mara, Kuantan, Pahang, p 57

Goh JK, Tan WT (2004) Electrochemical oxidation of methionine mediated by a C 60-fullerene modified electrode. In: Regional Conference for Young Chemists 2004, Universiti Sains Malaysia, Malaysia, p 90

Goh JK, Tan WT, Lim EB, Tan TJ (2002) Electrochemical studies of some charge transfer compounds in solution. In: Research and Invention Exhibition, FSAS, Universiti Putra Malaysia, p 32, awarded sliver medal.

Goh JK, Lim EB, Tan WT, Ilaha NR (2002) Electrochemical oxidation of L-cysteine and vitamin E using fullerene modified carbon electrode. In: Research and Invention Exhibition, FSAS, Universiti Putra Malaysia, p 37, awarded silver medal.