Question

Estimation of nitrite concentration in water sample

Answer 1

Water samples are preserved with nitric acid, or filtered and acid preserved and digested, sediment samples are always digested. Some sample solutions, especially waste waters and digestions of sediments, may contain large amounts of substances that may affect the results. High concentrations of chloride may cause low results, because the volatility of many elements are increased and analyte loss may occur during the pyrolysis step! Matrix effects may be overcome in different ways, different modifiers are suggested to reduce the interference effects.