分光光度法测定磷酸硅铝类化合物中的铝

Spectrophotometric Determination Aluminum in Compounds of Silico-Aluminum-Phosphate

用固相合成的方法合成磷酸硅铝(S iA lPO4)类化合物,所得化合物在聚乙二醇辛基苯基醚及聚乙烯醇存在下铝(III)与铬天青S的显色反应.在pH 5.3的HAc-NaAc缓冲介质中,体系最大吸收波长λm ax=612nm,用分光光度法测定磷酸硅铝类化合物中铝,实验结果与理论计算结果基本一致.

Silico- Aluminum- Phosphate（ SiAlPO4 -n） can be prepared by solid- state method in existed different template with Aluminum chloride and ammonium dihydrogen phosphate and sodium silicate. The color reaction of Aluminum with chromeazurolS （CAS） in the presence of emulsifying agent of polyethylene glycol phenylether （OP） and polyvinylacohol （PVA） was studied. In a buffer solution of HAc - NaAc of pH5.3, the maximum absorption wave of the title system appears at 612nm. The method has been successfully applied to the determination of Aluminum in Silico - Aluminum - Phosphate compounds. The good results were obtained. This system has high stability and good accuracy.