岩矿测试Issue(3)：286-291,6.DOI:10.15898/j.cnki.11-2131/td.2015.03.004
激光剥蚀电感耦合等离子体质谱法测定金属镀锡层的厚度
Quick Measurement of Thickness of Tin Coating on Metal by Laser Ablation Inductively Coupled Plasma-Mass Spectrometry
摘要
Abstract
Thickness analysis of tin coating on metal by Laser Ablation Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS)is affected by the laser pulse energy and its stability.A method has been proposed for quick measurement of thickness of tin coating on metal using a self-made picosecond laser ablation system coupled Inductively Coupled Plasma-Mass Spectrometry.Laser ablation was carried out using pulse energy of 12 μJ and defocus distance of 625 μm.Time resolved spectra (TRS)of 118 Sn and measured isotopes of the main elements in substrate were acquired,the time of ablation of zinc coating was gained according to the relationship of these TRS, the ablation rate was calculated by thickness standard sheet,and thickness of tin coating could be measured quickly.Ablation rate of tin coating was 88 nm /pulse and depth solution was 0.40 μm.The thickness standard sheet and practical sample,including tinplate with paint coating and tinned stainless steel strip,were analyzed by this method.The maximum deviation between the found values and the certified values was 0.5 μm.This method avoids the instability of ablation rate which results in the change of ablation amounts of one pulse.This method improves the accuracy and is suitable for the thickness measurement of metal coating of different types,and could be used in fields such as life sciences,archaeology,environment,and judicial expertise.关键词
镀锡层/涂层/厚度/皮秒激光剥蚀(psLA)/电感耦合等离子体质谱法Key words
tin coating/paint coating/thickness/picosecond laser ablation(psLA)/Inductively Coupled Plasma-Mass Spectrometry分类
化学化工引用本文复制引用
金献忠,谢健梅,陈建国..激光剥蚀电感耦合等离子体质谱法测定金属镀锡层的厚度[J].岩矿测试,2015,(3):286-291,6.基金项目
国家质检总局科技计划项目 （）
