研究了5-H-酸偶氮若丹宁(HAR)与Pt(Ⅳ)的显色反应,在HCl介质中,HAR与Pt(Ⅳ)反应生成2:1稳定配合物,λmax=540nm,ε=1.06×105L.mor1.cm-1.铂含量在0~30μg/25mL内符合比尔定律,新方法用于催化剂中铂含量的测定,结果令人满意.
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