作者单位:ZHAO Jing-hong,GUO Ya-lin,ZHANG Ning(Liaoning Entry-Exit Inspection and Quarantine Bureau, Dalian 116001, China)赵景红,郭雅琳,张宁(辽宁出入境检验检疫局,辽宁大连116001)SONG Xiao-ping(Institute of Metal Research,Chinese Academy of Sciences, Shengyang 110016, China)宋小平(中国科学院金属研究所,辽宁沈阳110016)