Abstract: | A novel host reagent of β‐cyclodextrin‐2,4‐dihydroxyacetophenone‐phenylhydrazine(β‐CDP‐DHPH) was synthesized and characterized by IR and 1H NMR spectra. A highly selective and sensitive spectrofluorimetric determination of trace amounts of cadmium was proposed based on the reaction between Cd2+ and β‐CDP‐DHPH at pH 10.0. The molar ratio of β‐CDP‐DHPH to Cd2+ was 1:1. The linear range of this method was 0.56‐120 μg·L?;1 with a detection limit of 0.20 μg·L?;1. The interferences of 39 common ions in the determination of cadmium were investigated, and the results showed that the host reagent had a quite high selectivity. This method was rapid and simple in determination of trace amounts of cadmium in mineral, tap and river water. |