在活性炭柱上预富集邻苯二酚紫络合物后，采用原子吸收光谱法测定天然水样中的痕量金属离子。
Determination of trace metal ions by AAS in natural water samples after preconcentration of pyrocatechol violet complexes on an activated carbon column.
作者信息
Narin I, Soylak M, Elçi L, Doğan M
机构信息
Niğde University, Faculty of Art and Science, Department of Chemistry, 51100 Niğde, Turkey.
出版信息
Talanta. 2000 Sep 5;52(6):1041-6. doi: 10.1016/s0039-9140(00)00468-9.
A simple preconcentration method is described for the determination of Cu, Mn, Co, Cd, Pb, Ni and Cr in water samples by flame AAS. Trace metal ions in water were sorbed as pyrocatechol violet complexes on activated carbon column at the pH range of 4-8, then eluted with 1 M HNO(3) in acetone. The effect of major cations and anions of the natural water samples on the sorption of metal ions has been also investigated. The concentration of the metal ions detected after preconcentration was in agreement with the added amount. The present method was found to be applicable to the preconcentration of Cu, Mn, Co, Cd, Pb, Ni and Cr in natural water samples with good results such as R.S.D. from 3 to 8% (N=10) and detection limits under 70 ng l(-1).
介绍了一种简单的预富集方法，用于通过火焰原子吸收光谱法测定水样中的铜、锰、钴、镉、铅、镍和铬。在pH值为4 - 8的范围内，水中的痕量金属离子以邻苯二酚紫配合物的形式吸附在活性炭柱上，然后用1 M硝酸的丙酮溶液洗脱。还研究了天然水样中的主要阳离子和阴离子对金属离子吸附的影响。预富集后检测到的金属离子浓度与添加量一致。结果表明，该方法适用于天然水样中铜、锰、钴、镉、铅、镍和铬的预富集，具有良好的效果，如相对标准偏差为3%至8%（N = 10），检测限低于70 ng l(-1)。
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