| Gold is a noble and rare metal, which has unique physical and chemicalproperties. In recent years, gold and gold salts have been widely used in the fields ofmedicine, chemistry, and biology. There have serious loss of gold and environmentalpollution caused by the excess development and application of gold. So, thedetermination of gold has become a more and more popular topic. There are manydetection methods for the gold determination, but fluorescent spectrometry is a majordetection method because of its high sensitivity, selectivity and low detection limit. Inthis paper, a sensitive and selective fluorescent sensor for gold determination wasdeveloped and discussed in detail.In chapter two, a fluorescent ligand, N-（2-（benzo[d]oxazol-2-yl）phenyl）-2-Chloroacetamide （NBOPC） was synthesized. Its structure has been characterized byNMR and MS.In chapter three, the anhydrous alcohol was used throughout. The properties ofthe Au（Ⅲ） ion fluorescent sensor were discussed in detail. The selectivity andsensitivity of the sensor for Au（Ⅲ） ion were determined under optimum conditions.The fluorescent intensity of NBOPC with concentration of5×10-3mol/L is the highestat room temperature. The sensor exhibits a linear dynamic response range for Au3+from2.0×10-6to2.1×10-5mol/L, with a detection limit of2.7×10-8mol/L. Other alkali,alkaline earth, and transitional metal ions had no significant interference on Au3+determination. The recovery rate for gold determination in artificial samples with thissensor is between98.39%and102.74%. |
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