Office location: NSC First Floor
Area of specialization: Analytical/Environmental Chemistry
- Analytical method development for determination of substances of health and environmental significance
- Pesticides and their fate in the environment
- Studies on endocrine disruptors and other emerging pollutants in the environment
Ngumba, E., Kosunen, P., Gachanja, A., Tuhkanen, T., 2016b. A multiresidue analytical method for trace level determination of antibiotics and antiretroviral drugs in wastewater and surface water using SPE-LC-MS/MS and matrix-matched standards. Anal. Methods 8, 6720–6729. doi:10.1039/C6AY01695B
Ngumba, E, Gachanjah, A., Tuhkanen. T (2015) Occurrence of Selected antibiotics and antiretroviral drigs in Nairobi River Basin, Kenya, Sci Total Environ. 539 (2016) 206-213
Nganga, F., Onditi, A., Gachanja, A., and Ngumba, E. (2013). Physicochemical Analysis of Honey in the Kenyan Retail Market. Journal of Food Science and Quality Management, 12, 30–37.
Shigwenya, E., Leornard, G., and Ngumba, E. (2012). Isolation And Identification Of Essential Oils From Cymbopogan Citratus ( Stapf ) Dc Using GC-MS And FT-IR. Journal of Chemistry and Materials Research, 2(4), 13–23.
Ng’ang’a F, Gachanja A., Onditi A. and Ngumba E., Application of Solid Phase Extraction with Gas Chromatography -Mass Spectrometry in Geographical Profiling and Characterization of Volatile Organics in Kenyan Honey. Journal of Food Science and Quality Management Vol 5 2012
H. N. Wanyika, E. G. Gatebe, L. M. Gitu, E. K. Ngumba and C. W. Maritim Determination of caffeine content of tea and instant coffee brands found in the Kenyan market. African Journal of Food Science, 2010, Vol. 4(6), pp. 353 – 358
Ngumba E., Maldonado J., Nyirenda J., Gachanja A. & Tuhkanen T. Economic and environmental potential of ecological sanitation with urine source separation: The case of peri–urban area of Chunga in Lusaka, Zambia; Oral Presentation in the 6th Dry Toilet Conference, 22nd -24th August 2018 in Hiedanranta, Tampere, Finland
Ngumba E., Kosunen P., Gachanja A. & Tuhkanen T. Determination of antibiotics and antiretroviral drugs in wastewater and surface water using SPE–LC–MS/MS and matrix–matched standards. Oral presentation in the Finnish Conference of Environmental Sciences, 16th-17th May 2017 in Joensuu, Finland
Ngumba, E., Gachanja, A., Ignatev, A., & Tuhkanen, T. Removal of pharmaceutical residues in Sub-Saharan Africa urban hydrological cycles. Oral presentation in BALEWARE 2016 conference, 11th -13th December 2016 in Nelson Mandela African institute of Science and Technology, Arusha, Tanzania
Ngumba, E., Gachanja, A., & Tuhkanen, T. Occurrence and environmental risk assessment of selected antibiotics and antiretroviral drugs in Nairobi River Basin, Kenya. Oral Presentation in SETAC Europe 26th Annual Meeting, 22nd -26th May 2016, Nantes, France
Ngumba, E., Gachanja, A., & Tuhkanen, T. Suppressing Antibiotic and Antiviral Pollution through Urine Recovery; Oral Presentation in the Dry Toilet Conference, 17th-21st August 2015 in Tampere University of Applied Sciences, Finland
Ngumba, E., Gachanja, A., & Tuhkanen, T. Occurrence of selected antibiotics and antiretroviral drugs in Nairobi River Basin, Kenya; Poster presentation in Finnish Conference of Environmental Sciences, 12th May 2015, University of Jyvaskyla, Finland
Ngumba, E., Pynnönen, S., and Tuhkanen, T. Fate of selected antimicrobial and antiviral drugs in source separated urine, Poster presentation in International Water Association, World Water Congress and Exhibition 21st-26th september 2014 at Lisbon, Portugal.
Ngumba E., Gachanja A., Kiptoo J., Studies on the degradation kinetics and levels of chlorothalonil and chlorpyrifos in water systems within coffee growing zones of Kiambu county, Kenya. Presented in 1st PACN Congress on agricultural productivity, held in Accra, Ghana, 21-23 November 2011.
Ngumba E, Gachanja A, Kiptoo J. Presented a paper on “Studies on the Degradation and levels of Chlorothalonil and Chlorpyrifos in Coffee Pulping Water” during the faculty of science postgraduate students conference at JKUAT 22nd June 2010
Ngumba E, Gachanja A, Kiptoo J; Method optimization for determination of Chlorothalonil in water by SPE” at the 6th Kenya Chemical Society/East and Southern Africa Environmental Chemistry International conference in Mombasa Kenya 5th -9th October 2009