1. Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
2. Shimadzu (Asia Pacific) Pte Ltd, 79 Science Park Drive, #02-01/08 Cintech IV Science Park 1, Singapore 118264, Singapore
3. NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore