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A method for nickel preconcentration by coprecipitation using Al(OH) 3 , followed by centrifugation and dissolution with HNO 3 prior to a determination by flame atomic absorption spectrometry (FAAS), was investigated. Preconcentration factors of 30 and 200 were tested, and the detection limit (3 × sd/m, n = 10) was 0.05 μg L -1 . The method was applied to real samples, and the results agreed with those obtained directly by graphite furnace atomic absorption spectrophotometry.

Determination of Nickel by Flame Atomic Absorption Spectrometry after Preconcentration by Coprecipitation with Aluminum Hydroxide