2 publications

• Published Subscription 5 Jan 2026

  Analytical Evaluation of heavy metals  in eyeshadows: A Risk assessment and Implications for Public Health Regulatory Reforms in Nigeria

  By Verla Evelyn Ngozi, Verla Andrew Wirnkor, Ekweogu Chinonye Victoria, Diagi Bridget Edewede, Aririguzo Bernadine Ngozi, Iwuoha Godson Ndubuisi

  Abstract: This study employs advanced analytical techniques to assess heavy metal contamination (Pb, Cd, Cr, Ni, Zn) in 18 commercially available eyeshadow products (local and imported) from Owerri Metropolis, Nigeria. Quantification was conducted using atomic absorption spectroscopy (AAS), while risk evaluations incorporated chemometric modeling approaches. Results revealed significant contamination in locally manufactured brands, particularly those containing calabash chalk (Nzu) as a base ingredient. Lead and nickel concentrations reached 166.58 ± 6.5 …

  Published in International Journal of Analytical and Applied Chemistry · Vol. 12, Issue 1, 2026 Read article →

• Published Subscription 10 Jan 2025

  Assessing trends in Speciation of First-Row Transition Metals in Children's Playgrounds of Owerri, Nigeria

  By Verla Andrew Wirnkor, Ekweogu Chinonye Victoria, Diagi Bridget Edewede, Aririguzo Bernadine Ngozi, Iwuoha Godson Ndubuisi

  Abstract: Chemical species of metals affect toxicity but trends of these metals species in soils are less studied. This study examined the trends and variability of species of metals in soils from playgrounds within Owerri. Eighty-one composite soil samples from nine playgrounds were collected in dry and rainy season to reflect spatio-seasonal variability. Samples were characterized by standard methods in triplicates and then extracted sequentially. Concentrations of metal species were determined …

  Published in International Journal of Green Chemistry · Vol. 11, Issue 1, 2025 · pp. 28–45 Read article →