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Green solid phase extraction for preconcentration of Beryllium

Jalal Hassan

A green solid phase extraction (SPE) based on modified octadecyl silica gel with ellagic acid a sorbent for preconcentration of trace amount of beryllium has been introduced. Parameters affected solid phase exstraction process such as: pH, sample solution and eluant flow rate, type, concentration and volume of eluant, interfering ions and breakthrough volume were investigated. Under optimal condition, the beryllium ions were retained on SPE at pH 6.1-6.7 and 2.0 mL of 0.30 mol L-1 HNO3 can eluate them quantitatively. The limit of detection (LOD) based on 3Sbl is 0.3 µg L-1 for 500 mL sample solution and 2 mL 0.5 mol L-1 HNO3 as an eluent. The accuracy and precision of method was >85% and <10%, respectively. Finally, the proposed method applied successfully for determination of beryllium in aqueous and alloy samples.