Animal & Veterinary

Hiranthi Jayasuriya, PhD

Division of Residue Chemistry

Hiranthi Jayasuriya, PhD

Hiranthi Jayasuriya, PhD
Research Chemist
P: +1 (240) 402-6688


Dr. Hiranthi Jayasuriya is a research chemist with the Division of Residue Chemistry in the Office of Research at FDA’s Center for Veterinary Medicine. In 1998, she received her PhD in natural products chemistry from the University of Mississippi. She joined FDA as a research chemist in 2008 after working as a senior scientist at Merck Research Laboratories in natural products drug discovery for 16 years. Her primary responsibilities at CVM include conducting and coordinating research in analytical method development for residue analysis in animal tissue and feed.


  • Development of high-resolution mass spectrometric (HRMS) methods for residue analysis
  • Untargeted analysis by HRMS
  • Development of HRMS guidances

Selected Publications

Jayasuriya, H., Li, H., Turnipseed, S., Crowley, T., Gamble, B., Wong, J., 2016. “Acceptance Criteria for Confirmation of Identity of Chemical Residues Using Exact Mass Data Within the Office of Foods and Veterinary Medicine." Available at

Herath, K., Girard, L., Reimschuessel, R., and Jayasuriya, H., 2017. Application of time-of-flight mass spectrometry for screening of crude glycerins for phorbol ester contaminants. Journal of Chromatography B, 1046, pp. 226–234.

Nishshanka, U., Jayasuriya, H., Chattopadhaya, C., Kijak, P.J., Chu, P.S., Reimschuessel, R., Tkachenko, A., Ceric, O. and De Alwis, H.G., 2016. Screening for toxic phorbol esters in jerky pet treat products using LC–MS. Journal of Chromatography B, 1020, pp. 90–95.

Nishshanka, U., Chu, P.S., Evans, E., Reimschuessel, R., Hasbrouck, N., Amarasinghe, K. and Jayasuriya, H., 2015. Tentative structural assignment of a glucuronide metabolite of methyltestosterone in tilapia bile by liquid chromatography–quadrupole-time-of-flight mass spectrometry. Journal of Agricultural and Food Chemistry, 63(24), pp. 5753–5760.

Amarasinghe, K., Chu, P.S., Evans, E., Reimschuessel, R., Hasbrouck, N., and Jayasuriya, H., 2012. Development of a fast screening and confirmatory method by liquid chromatography–quadrupole-time-of-flight mass spectrometry for glucuronide-conjugated methyltestosterone metabolite in tilapia. Journal of Agricultural and Food Chemistry, 60(20), pp. 5084–5088.

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