Analytical Sciences

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

Nopphawun THUBKHUN and Napa TANGTREAMJITMUN

Department of Chemistry, Faculty of Science, Burapha University, Mueang, Chonburi, 20131, Thailand

A method for nickel preconcentration by coprecipitation using Al(OH)₃, followed by centrifugation and dissolution with HNO₃ 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.

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