ICP-MS Determination of Metal Elements in Electric Current Speckle with Laser Ablation Sample Introduction

A method of ICP-MS for determination of metal elements in doubtful electric current speckle of skin with laser ablation sample introduction was proposed.By comparing contents of metal elements in metallic conductor,in doubtful speckle on skin and in blank skin,it was found that: the contents of Cr,Ni and Cu in metallic conductor were highest.While the contents of above 3 elements in doubtful speckle of skin were lower,but were about two orders of magnitude higher than those in blank skin.Hence,the doubtful speckle of skin was identified to be electric current speckle.