?url_ver=Z39.88-2004&rft_id=10.1016%2FS0021-9673(01)97845-8&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Heckenberg%2C+AL&rft.aulast=Heckenberg&rft.aufirst=AL&rft.volume=299&rft.date=1984&rft.issn=0021-9673&rft.atitle=Determination+of+inorganic+anions+at+parts+per+billion+levels+using+single-column+ion+chromatography+without+sample+preconcentration&rft.title=Journal+of+Chromatography&rft.pages=301-305&rft.genre=article