1 <A href="http://gouwuche.com/science?_ob=ArticleURL&_udi=B73HW-4YH4KR2-B4&_user=501045&_coverDate=02%2F24%2F2010&_alid=1437543901&_rdoc=1&_fmt=high&_orig=search&_cdi=11565&_sort=r&_docanchor=&view=c&_ct=2&_acct=C000022659&_version=1&_urlVersion=0&_userid=501045&md5=e2166fe08a5724c9b46e60ebed1d6c9d" ?>X-Ray Fluorescence Spectrometers