title: Trace elements in drinking and groundwater samples in southern Nigeria.
abstract: The levels of Al, Sn, Cs, Rb, Sr, Br, Cr, Mo, Co, Ba, Cu, Zn, Cd, Pb, Mn, Se, As, V and Ni were determined in drinking water supplies (public taps, domestic taps and treated water from public water sources) and groundwater supplies (boreholes and shallow wells) in some parts of Southern Nigeria. The water samples were analysed using inductively coupled plasma mass-spectrometry (ICP-MS). The mean levels (microgram/l) of all the elements ranged between 0.35 microgram/l for Cs and 87.3 micrograms/l for Zn in the drinking waters and between 0.54 microgram/l for Co and 420.3 micrograms/l for Ba in the groundwaters. A comparison of the elemental concentrations with WHO guidelines showed that with the exception of violations of Cd, Cr and Se limits in some of the drinking water samples, the levels of all the other elements investigated were below the WHO maximum allowable concentrations.
authors.affiliation: Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria, Africa.
authors.forename: O I
authors.initials: OI
authors.lastname: Asubiojo
authors.forename: N A
authors.initials: NA
authors.lastname: Nkono
authors.forename: A O
authors.initials: AO
authors.lastname: Ogunsua
authors.forename: A F
authors.initials: AF
authors.lastname: Oluwole
authors.forename: N I
authors.initials: NI
authors.lastname: Ward
authors.forename: O A
authors.initials: OA
authors.lastname: Akanle
authors.forename: N M
authors.initials: NM
authors.lastname: Spyrou
mesh_terms: D004784:Environmental Monitoring; D017408:Guidelines as Topic; D006801:Humans; D009549:Nigeria; D014131:Trace Elements / Q000032:analysis*; D014877:Water Pollution, Chemical; D014881:Water Supply / Q000032:analysis* / Q000592:standards; D014944:World Health Organization
chemical_list: D014131:Trace Elements