The Residue Laboratory (Analytical Services) is the National Reference Laboratory for Antibiotics, Pesticides and Veterinary Drug residues in feed and animal products for over 15 years.  Currently, the laboratory delivers the South African National Residue Control Plan (NRCP) under Council Directives 96/23/EC and the National Residue Monitoring Plan, which involves testing approximately 7000 samples per annum.

The laboratory has a standing vigorous system that ensures "chain of custody" and all analytical methods used for this purpose have been validated and are accredited to ISO 170205 (SANAS) standard (Technique/Matrix/Analyte dependant).

Meet our Staff

NamePositionEmail Business Tel. No.
Research Staff ​ ​ ​ ​
Dr E Elgorashi Acting Research Team Leader (0)12 529 9151
Technical Staff ​ ​ ​ ​
Mrs Itumeleng MosetlheChief Research Technician

+27 (0)12 529 9475
Ms. Pumza Muriel GatyeniSenior Research Technician

+27 (0)12 529 9131
Ms. Nokuthula LuthuliResearch Technician

+27 (0)12 529 9469
Mrs. Dipolelo MasitheResearch Technician

+27 (0)12 529 9469
Mr. Lungile MatikaResearch Technician

+27 (0)12 529 9469
Ms. Monica MoeraneResearch Technician

+27 (0)12 529 9473
Mrs. Maropeng LetsoaleResearch Technician

+27 (0)12 529 9473
Support Staff ​ ​ ​ ​
Mrs. Mabore NkoanaAdministrative  Assistant

+27 (0)12 529 9194
Mr. Kleinboy PheleResearch Assistant

Mr. Lesibe MonyepabeResearch Assistant

+27 (0)12 529 9469
Ms. Francinah PheleLaboratory Assistant


Current Research Projects

  1. Using Radionuclides to Improve Liquid Chromatography tandem Mass Spectrometry (LC-MS/MS), Gas Chromatography tandem Mass Spectrometry (GC-MS/MS) and Liquid Scintillation Counter Analytical Methods for Monitoring of Aquaculture Production Sites and Produce.

  2. Development and Validation of Multiclass and Multiresidue Analytical Protocols for the Monitoring of Brominated and Organophosphate Flame Retardants, Perfluorinated Chemicals in the South African Food Market Basket: Implications for Human Exposure via Dietary Intake.

  3. Development and Validation of Analytical Methods for the Monitoring of Trace Organic Chemicals (TrOCs) in Waste streams.

  4. Development and Use of Reference and Quality Control Materials.

​Analytical Diagnostic Services

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The residue laboratory provides training for local students (Postgraduate and experiential) on various topics in food and feed safety analysis.  The laboratory also provides external training for researchers, technicians and quality control officers from various countries in the African continent under the International Atomic Energy Agency (IAEA) coordinated research project. 

The laboratory encourages knowledge and skills transfer through scientific exchange programme for postgraduate students, postdoctoral fellows and experienced researchers.

Recent publications

S. Maddila, OA Abafe, HN Banderu, SN Maddila, P Lavanya, N Seshadri, SB Jonnalagadda (2016).     V-CaHAp as a recyclable catalyst for the green multicomponent synthesis of benzochromenes.  Arabian Journal of Chemistry. In press. doi: 10.1016/j.arabjc 2015.12.008

Abafe  OA and Martincigh BS (2016). Determination and human exposure assessment of polybrominated diphenyl ethers and tetrabromobisphenol A in indoor dust in South Africa. Environmental Science and Pollution Research.  23: 7038 – 7049

Abafe OA and Martincigh BS (2015).  Polybrominated diphenyl ethers and polychlorinated biphenyls in the indoor dust of e-waste recycling facilities in South Africa: Implications for occupational exposure. Environmental Science and Pollution Research.  22:1407814086

Abafe OA and Martincigh BS (2015).  Polybrominated diphenyl ethers and polychlorinated biphenyls in indoor dust in Durban, South Africa. Indoor Air. 25: 547–556

Abafe OA  and Martincigh BS (2015). Concentrations and oral bioaccessibility of phosphorus flame retardants in indoor dust of a polyurethane industry. Organohalogen Compounds. 77, 793-795

Abafe, OA and Martincigh, BS (2014), Organophosphorus flame retardants and plasticizers in dust from automobiles, homes, offices and university classrooms: implications for personal exposure via inadvertent dust ingestion.  Organohalogen Compounds Vol. 76, 277-280.

Abafe, OA and Martincigh, BS (2014), Modification and application of an in vitro human gastrointestinal tract for the determination of oral bioaccessibility of polybrominated diphenyl ethers.  Organohalogen Compounds Vol. 76, 273-276.

Maddila S, Damu GLV, Oseghe EO, Abafe OA, Venakata Rao C and Lavanya P (2012).  Synthesis and Biological Studies of Novel Biphenyl-3,5-dihydro-2H thiazolopyrimidines Derivatives. Journal of the Korean Chemical Society, Vol. 56, No. 3.334.

Ayede AI, Adewuyi GO,and  Abafe OA (2011). Development and Validation of a Thin Layer Chromatographic Method for the Simultaneous Determination of Sulphadoxine -Pyrimethamine, Artemether-Lumenfantrine its Metabolite and Artesunate+Amodiaquine Metabolites in Human Urine. International Journal of Chemistry, Vol. 21(1). 41 – 53

Adewuyi GO,  Abafe OA and Ayede AI (2011). Development and Validation of a Thin Layer Chromatographic Method for the Determination of Artesunate and Amodiaquine in Tablet Formulations. Africa Journal of Biotechnology, Vol 10(60), 13028- 13038.

Adewuyi GO, Olatoye OL, Abafe OA, Otokpa MO and Nkukut NK (2011). High Performance Liquid Chromatographic Methods for Evaluation of Two Antibiotic Residues in Liver and Muscle of Broilers in Ibadan City, Southern Nigeria. Journal of Pharmaceutical and Biomedical Sciences, Vol. 11 (11). 1 – 4


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