Kiran K, Suresh Kumar K, Suvardhan K, Janardhanam K, Chiranjeevi P
Department of Environmental Sciences, S. V. University, Tirupati 517502, AP, India.
J Hazard Mater. 2007 Aug 17;147(1-2):15-20. doi: 10.1016/j.jhazmat.2006.12.044. Epub 2006 Dec 21.
2-{[1-(2-Hydroxynaphthyl) methylidene] amino} benzoic acid (HNMABA) was synthesized for solid phase extraction (SPE) to the determination of Co, Cu, Ni, Zn and Cd in environmental and biological samples by flame atomic absorption spectrophotometry (FAAS). These metals were sorbed as HNMABA complexes on activated carbon (AC) at the pH range of 5.0+/-0.2 and eluted with 6 ml of 1M HNO3 in acetone. The effects of sample volume, eluent volume and recovery have been investigated to enhance the sensitivity and selectivity of proposed method. The effect of interferences on the sorption of metal ions was studied. The concentration of the metal ions detected after preconcentration was in agreement with the added amount. The detection limits for the metals studied were in the range of 0.75-3.82 microg ml(-1). The proposed system produced satisfactory results for the determination of Co, Cu, Ni, Zn and Cd metals in environmental and biological samples.
合成了2-{[1-(2-羟基萘基)亚甲基]氨基}苯甲酸（HNMABA），用于通过火焰原子吸收光谱法（FAAS）对环境和生物样品中的钴、铜、镍、锌和镉进行固相萃取（SPE）测定。这些金属在pH值为5.0±0.2的条件下以HNMABA配合物的形式吸附在活性炭（AC）上，并用6毫升1M硝酸的丙酮溶液洗脱。研究了样品体积、洗脱剂体积和回收率的影响，以提高所提出方法的灵敏度和选择性。研究了干扰物对金属离子吸附的影响。预浓缩后检测到的金属离子浓度与添加量一致。所研究金属的检测限在0.75-3.82微克/毫升范围内。所提出的体系用于环境和生物样品中钴、铜、镍、锌和镉金属的测定，结果令人满意。
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