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因胶束增溶(增敏)分光光度法普遍存在选择性差的问题,使实际应用受到限制。PAN是常用的分析试剂之一,金属-PAN的胶束增溶光度法已有报道,戚文彬曾详细研究了镍-PAN-TritonX-100体系,但其选择性均欠佳。 作者曾用高效液相色谱法(HPLC)研究了钴-PAN-TritonX-100体系,发现了在给定的色谱条件下,PAN对钴的特效性,为提高PAN光度测定金属离子的选择性开辟了新的途径。本文主要用HPLC研究镍-PAN-TritonX-100体系,同样发现了PAN对镍特效性的色谱条件,拟定了高选择性,高灵敏度镍的HPLC-光度法。用于基体较为复杂的污水、对虾饵料样品中痕量镍的测定,获得非常满意的结果。
Due to micellar solubilization (sensitization) spectrophotometry prevalence of poor selectivity, so that the practical application is limited. PAN is one of the most commonly used analytical reagents. Micellar solubilization of metal-PAN has been reported. Qi Wenbin studied the nickel-PAN-Triton X-100 system in detail, but its selectivity was poor. The authors studied the cobalt-PAN-Triton X-100 system by high performance liquid chromatography (HPLC) and found the specific effect of PAN on cobalt under the given chromatographic conditions. The selectivity of PAN for the determination of metal ions in PAN was improved A new way. In this paper, mainly by HPLC study of nickel-PAN-TritonX-100 system, also found that the specificity of PAN for nickel chromatography conditions, the development of high selectivity, high sensitivity of nickel HPLC-spectrophotometry. For the more complex matrix wastewater, shrimp food samples of trace nickel determination, to obtain very satisfactory results.