求翻译：本研究采用了没食子酸（GA）功能化的纳米银颗粒来检测铅离子，通过纳米银表面的GA与铅离子络合后导致的纳米银颗粒最大吸收峰位置的变化，定量检测铅离子浓度。文中考察了硝酸银浓度及pH等条件对纳米银的制备和检测灵敏度的影响。实验证明该方法准确性高，检测限低，实际应用性强。是什么意思？

In this study, using a gallic acid (ga) functionalized nano-silver particles to detect lead ions, the surface of the nano-silver ga with the lead ion complexation led to the nano-silver particles maximum absorption peak position of the change, quantitative detection of lead%2