Analytical Sciences

Application of Acetylacetone Chelation Solid-Phase Extraction to GFAAS Measurements of Trace Amounts of Beryllium in Marine Organisms

Min-Te HSU,* Meng-Hsien CHEN,** Sheng-Ren YANG,* and Mao-Sung KUO*

*Department of Environmental Science, Tunghai University, Taichung 407, Taiwan, Republic of China
**Department of Marine Resources, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan, Republic of China

Trace amounts of Be (0.046 - 2.59 ng) in a dried marine organism sample (10 mg) could be accurately determined by GFAAS after treating with microwave digestion (HNO₃/H₂O₂) at 85°C for 10 min and using acetylacetone as a chelating agent in the presence of an acetate buffer (pH 6.0). The method detection limit (MDL, 3 σ) for Be was found to be 4.6 ng g^-1; the calibration graph was linear up to 259 ng g^-1. Good recoveries (98.5 - 105.0%) were obtained for eight marine organism samples (including five fish, one lobster, one oyster, and one algae) with a relative standard deviation (RSD, n = 3) < 3.0%. The proposed method could be applied measurements of Be in various marine organisms.

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