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目前痕量组分的测定已成为分析化学的重要课题。在痕量分析中,光度分析仍是一个广泛应用的方法。对于光度分析来说,测定的灵敏度经常还是以反应生成的有色化合物的摩尔吸光系数来度量的。大多数有机试剂与金属离子生成的络合物的摩尔吸光系数通常为10~4数量级。十年来,有机试剂的研究取得了很大进展,摩尔吸光系数为10~5数量级的试剂已屡见不鲜。但时至今日,从理论上解释络合物摩尔吸光系数的大小与分子结
The determination of trace components has become an important issue in analytical chemistry. In trace analysis, photometric analysis is still a widely used method. For photometric analysis, the sensitivity of the assay is often measured as the molar extinction coefficient of the colored compound produced by the reaction. The molar extinction coefficient of the complex formed by most organic reagents and metal ions is typically in the order of 10-4. In recent ten years, great progress has been made in the research of organic reagents. It is not uncommon for reagents with molar extinction coefficients of the order of 10 to 5. However, to date, the molar extinction coefficient of complexes and the molecular junction are theoretically explained