Zinc and arsenic are naturally occurring elements in water systems, but their distribution can become uneven due to the impacts of urbanization. At low concentrations, zinc is beneficial to the environment and the organisms within it, serving as an essential nutrient. At elevated levels, zinc and arsenic are toxicants, posing serious risks to ecosystems and human health. Moreover, zinc and arsenic may serve as tracers for other pollutants, as the sources releasing zinc and arsenic, such as failing infrastructure and semiconductors, frequently emit additional contaminants. This makes zinc and arsenic valuable indicators in pollution studies. Given that rural water zinc and arsenic concentrations can be extremely low, averaging from 2-5 ppb (Christian et al., 2011, Garnier et al., 2024, Le Pape et al., 2012), if not below detection, optimizing analytical methods and instrumentation is crucial to obtaining accurate data. In previous experiments, significant variation was observed in zinc concentrations across replicate samples, highlighting the need for methodological improvements—this is the primary focus of this project.