?url_ver=Z39.88-2004&rft_id=10.1016%2FS0165-9936(01)00074-7&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ohta%2C+K&rft.aulast=Ohta&rft.aufirst=K&rft.issue=6-7&rft.volume=20&rft.date=June+2001&rft.issn=0167-2940&rft.atitle=Simultaneous+separation+of+common+mono-+and+divalent+cations+on+silica+gels+modified+with+aluminium+and+zirconium&rft.title=TrAC+-+Trends+in+Analytical+Chemistry&rft.pages=330-335&rft.genre=article