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Health Sciences Authority

Publications and Presentations

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2017 

  • “APMP.QM-S8: determination of mass fraction of benzoic acid, methyl paraben and n-butyl paraben in soy sauce”. Tang Lin Teo, Ee Mei Gui, Ting Lu, Pui Sze Cheow, Panagiota Giannikopoulou, Elias Kakoulides, et al.  Metrologia, Vol 54, Technical Supplement.
  • “Optimisation of extraction methods and quantification of benzo[a]pyrene and benz[a]anthracene in yerba maté tea by isotope dilution mass spectrometry”. Ee Mei Gui, Ting Lu, Tang Lin Teo, Pui Sze Cheow, Tong Kooi Lee. Analytical and Bioanalytical Chemistry, DOI 10.1007/s00216-017-0544-y.
  • “Liquid chromatography–isotope dilution tandem mass spectrometry method for the measurement of urea in human serum and assignment of reference values to external quality assessment samples”. Sharon Yong, Hong Liu, Lingkai Wong, Hui Ling Teo, Yizhao Chen, Qinde Liu, Tang Lin Teo, Tong Kooi Lee. International Journal of Mass Spectrometry, Vol 414, 2017, p 87-93.
  • “Response to Letter to the Editor regarding ‘Achieving comparability with IFCC reference method for the measurement of hemoglobin A1c by use of an improved isotope-dilution mass spectrometry method’”. Hong Liu, Lingkai Wang, Sharon Yong, Qinde Liu, Tang Lin Teo, Tong Kooi Lee. Analytical and Bioanalytical Chemistry, DOI 10.1007/s00216-017-0516-2.
  • “Development of high accuracy methods for the certification of calcium, iron, magnesium and potassium in human serum”. Chang Xu, Yi Ding, Ho Wah Leung, Benny Meng Kiat Tong, Richard Y.C. Shin, Tong Kooi Lee. Journal of Trace Elements in Medicine and Biology, Vol 40, 2017, p 61–66.

2016

  • “Development of an apple juice certified reference material for cadmium, lead, total arsenic and arsenic species”. Fransiska Dewi, Lay Peng Sim, Juan Wang, Benny M.K. Tong, Richard Y.C. Shin, Tong Kooi Lee. International Journal of Mass Spectrometry, Vol 411, 2016, p 14-20.
  • “Simple and accurate measurement of carbamazepine in surface water by use of porous membrane-protected micro-solid-phase extraction coupled with isotope dilution mass spectrometry”. Hui Ling Teo, Lingkai Wong, Qinde Liu , Tang Lin Teo, Tong Kooi Lee, Hian Kee Lee. Analytica Chimica Acta, Vol 915, 2016, p 49-57.
  • “Development of a mushroom powder Certified Reference Material for calcium, arsenic, cadmium and lead measurements”. Gina Chew, Lay Peng Sim, Sin Yee Ng, Yi Ding,  Richard Y.C. Shin, Tong Kooi Lee. Food Chemistry, Vol 190, 2016, p 293-299.

2015

  • “Development of a cosmetic cream certified reference material : Certification of lead, mercury and arsenic mass fractions in cosmetic cream”. Sin Yee Ng, Fransiska Dewi, Juan Wang, Lay Peng Sim, Richard Y.C. Shin, Tong Kooi Lee. International Journal of Mass Spectrometry, Vol 389, 2015, p 59–65.
  • “Achieving comparability with IFCC reference method for the measurement of hemoglobin A1c by use of an improved isotope-dilution mass spectrometry method”. Hong Liu, Lingkai Wong, Sharon Yong, Qinde Liu, Tong Kooi Lee. Analytical and Bioanalytical Chemistry, Vol 407, 2015, p 7579-7587.
  • “Developing a reference measurement procedure for free glycerol in human serum  by two-step gas chromatography-isotope dilution mass spectrometry”. Yizhao Chen, Hui Ling Teo, Qinde Liu, Tong Kooi Lee. Clinical Biochemistry, Vol 48, 2015, p 897-903.
  • “Improved reference measurement method for hemoglobin A1c by use of liquid chromatography–isotope dilution–tandem mass spectrometry”. Lingkai Wong, Hong Liu, Sharon Yong, Qinde Liu, Tong Kooi Lee. Clinical Chemistry, Vol 61(2), 2015, p 435-436. 
  • “Certified reference materials for clinical measurements”. Tang Lin Teo. Oral presentation at the 15th ASEAN Conference of Clinical Laboratory Sciences 2015, Singapore, 21-23 Jun 2015.
  • “Achieving SI traceability in HbA1c measurements through peptide quantification”. Hong Liu, Sharon Yong, Lingkai Wong, Qinde Liu, Tang Lin Teo, Tong Kooi Lee. Poster presentation at the 21st IFCC-EFLM European Congress of Clinical Chemistry and Laboratory Medicine, Paris, France, 21-25 Jun 2015.
  • “Developments in certified reference materials production for food and clinical analyses in Singapore”. Pui Sze Cheow, Juan Wang, Tang Lin Teo, Tong Kooi Lee. Poster presentation at the 14th International Symposium on Biological and Environmental Reference Materials (BERM-14), Washington DC, USA, 11 - 15 Oct 2015.
  • “Developing a certified reference material for haemoglobin A1c in human blood”. Lingkai Wong. Oral presentation at the14th International Symposium on Biological and Environmental Reference Materials (BERM-14), Washington DC, USA, 11 - 15 Oct 2015.
  • “Proficiency testing scheme on toxic elements (As, Pb & Hg) in cosmetic cream”. Richard Shin. Oral presentation at the ASEAN Cosmetic Testing Laboratories Committee Meeting, Singapore, 26 Oct 2015.
  • “Establishment and dissemination of metrological traceability in inorganic analysis in Singapore”. Tang Lin Teo. Oral presentation at the 31st Asia Pacific Metrology Programme, Technical Committee for Amount of Substance Workshop, Beijing, China, 30 Oct 2015.
  • “Is proficiency testing only about z-score”.  Tang Lin Teo. Oral presentation at the 7th Asian Forensic Sciences Network, Kuala Lumpur, Malaysia, 16-17 Nov 2015.
  • “Using certified reference materials for quantitative analysis in forensic chemistry”.  Tang Lin Teo. Oral presentation at the 7th Asian Forensic Sciences Network, Kuala Lumpur, Malaysia, 16-17 Nov 2015.
  • “HSA’s activities in support of traceability in laboratory medicine”. Qinde Liu. Oral presentation at the JCTLM Members’ and Stakeholders’ Meeting 2015, Paris, France, 30 Nov 2015 – 1 Dec 2015.
  • “Certified reference materials for clinical measurements”. Qinde Liu. Oral presentation at the Standards Adoption Workshop Biomedical Standards Industry Series 2015, Singapore, 10 Dec 2015.

2014

  • "Providing a traceable assigned value in a proficiency testing programme on the determination of benzoic acid in orange juice". Shiwan Cheng, Charline Mesquida, Ee Mei Gui, Pui Sze Cheow, Tong Kooi Lee, Tang Lin Teo. Accred Qual Assur, Vol 19, 2014, p 439-443. 
  • “Determination of total thyroxine in human serum by hollow fiber liquid-phase microextraction and liquid chromatography-tandem mass spectrometry”. Sharon Yong, Yizhao Chen, Tong Kooi Lee and Hian Kee Lee. Talanta, Vol 126, 2014, p 163-169.
  • “An improved reference measurement procedure for triglycerides and total glycerides in human serum by isotope dilution gas chromatography–mass spectrometry”. Yizhao Chen, Qinde Liu, Sharon Yong, Hui Ling Teo and Tong Kooi Lee. Clinica Chimica Acta, Vol 428, 2014, p 20-25.
  • “Providing an Accuracy-Based EQA Programme: The HSA Experience”. Qinde Liu. Oral presentation at the 25th ASM of SAMLS, Singapore, 25 Oct 2014.
  • “Impact of Metrology on Quality”. Tang Lin Teo. Oral presentation at the 25th ASM of SAMLS, Singapore, 25 Oct 2014.

2013

  • “Determination of cyanuric acid using exact matching isotope dilution mass spectrometry”. Guiwan Koh, Ee Mei Gui, Tang Lin Teo and Tong Kooi Lee. J. Sep. Sci., Vol 36, 2013, p 1054-1060.
  • “Developing an accuracy-based proficiency testing programme in clinical chemistry”. Tong Kooi Lee. Oral presentation at the 4th Congress of AAMLS & 24th ASM of SAMLS, Singapore, 3 Oct 2013.
  • “Establishing the metrological traceability of glycated haemoglobin (HbA1c) measurement”. Lingkai Wong. Oral presentation at the 4th Congress of AAMLS & 24th ASM of SAMLS, Singapore, 3 Oct 2013.
  • “Measurement of triglycerides and total glycerides in human serum by gas chromatography-isotope dilution mass spectrometry”. Yizhao Chen. Oral presentation at the 4th Congress of AAMLS & 24th ASM of SAMLS, Singapore, 3 Oct 2013.
  • “Metrology in clinical chemistry – developing an external quality assessment programme in Singapore”. Qinde Liu. Oral presentation at the 15th Beijing Conference and Exhibition on Instrument Analysis, Beijing, China, 3 Oct 2013.

2012

  • “High accuracy analysis of glucose in human serum by isotope dilution liquid chromatography-tandem mass spectrometry”. Yizhao Chen, Qinde Liu, Sharon Yong and Tong Kooi Lee. Clinica Chimica Acta, Vol 413, 2012, p 808-813.
  • “High accuracy measurements of trace elements in drinking water by exact matching isotope dilution mass spectrometry (IDMS)”. Sin Yee Ng, Aimei Zou, Lay Peng Sim, Yi Ding, Kim Loong Yuen, Richard Y.C. Shin and Tong Kooi Lee. Int. J. Mass Spectrom, Vol 312-322, 2012, p 19-24.
  • “A bilateral study for the establishment of comparability in the measurement of ethanol in bioethanol fuel using isotope dilution mass spectrometry”. Tang Lin Teo, Can Quan, Pui Sze Cheow, Ting Huang, Tong Kooi Lee, Hongmei Li and Wei Zhang. Accred. Qual. Assur, Vol 17(3), 2012, p 315-321.
  • “Metrology in chemistry – setting up the national infrastructure in Singapore”.  Tong Kooi Lee. Oral presentation at the Total Laboratory Management Symposium 2012, Jakarta, Indonesia, 9 May 2012.
  • “Establishing metrological traceability in chemical measurements”. Tong Kooi Lee. Oral presentation at the Total Laboratory Management Symposium 2012, Jakarta, Indonesia, 10 May 2012.
  • “Establishing a chemical metrology programme for clinical measurements”. Tang Lin Teo. Oral presentation at the JAIMA Asia Technical Forum, Chiba, Japan, 6 Sep 2012.

 2011

  • “Determination of melamine in milk powder using gas chromatography-high resolution isotope dilution mass spectrometry”. Guiwan Koh, Rosalind S.C. Chia, Qi Lin, Pui-Sze Cheow, Tang-Lin Teo and Tong-Kooi Lee. J. Sep. Sci., Vol 34, 2011, p 3043-3052.