研究了船体防污漆中主要防污成分--三苯基一氯化锡(TPTCl)与牛血清白蛋白(BSA)作用的光谱特征. 结果表明,TPTCl与BSA的相互作用是双重的. 既有TPTCl中锡离子与BSA的配位作用,使BSA分子中色氨酸和酪氨酸芳杂环残基裸露,又有TPTCl中苯环的疏水作用,使BSA分子发生收缩. 随着反应时间不同,紫外光谱表现为先是明显的增色效应,后是增色效应略有减弱. 且低浓度的TPTCl与BSA主要表现为锡离子与BSA的配位作用,高浓度的TPTCl与BSA主要表现为苯环的疏水作用. 缓冲溶液的加入则有利于TPTCl与BSA的相互作用,但影响程度不同. 增色效应顺序是KH2PO4-NaOH体系＞Tris-HCl体系＞HAc-NaAc体系＞无缓冲液体系.
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