A commercial arsenic field kit designed to measure inorganic arsenic (iAs) in water was modified into a field deployable method (FDM) to measure iAs in rice. While the method has been validated to give precise and accurate results in the laboratory, its on-site field performance has not been evaluated. This study was designed to test the method on-site in Malawi in order to evaluate its accuracy and precision in determination of iAs on-site by comparing with a validated reference method and giving original data on inorganic arsenic in Malawian rice and rice-based products. The method was validated by using the established laboratory-based HPLC-ICPMS. Statistical tests indicated there were no significant differences between on-site and laboratory iAs measurements determined using the FDM (p=0.263, ά=0.05) and between on-site measurements and measurements determined using HPLC-ICP-MS (p=0.299, ά=0.05). This method allows quick (within 1 hour) and efficient screening of rice containing iAs concentrations on-site.
- field deployable method
- inorganic arsenic
- maximum contaminant limit
Mlangeni, A. T., Vecchi, V., Norton, G. J., Raab, A., Krupp, E. M., & Feldmann, J. (2018). Comparison of on-site field measured inorganic arsenic in rice with laboratory measurements using a field deployable method: Method validation. Food Chemistry, 263, 180-185. https://doi.org/10.1016/j.foodchem.2018.04.133