Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Teshima Norio and Sakai Tadao and Higuchi Keiro and Takahashi Motoyuki and Tetsuo Komoda and Kurahashi Ken-ichi and Grudpan Kate,Flow Injection Simultaneous Determination of Copper and Iron in Lubricating Oil Using a New Spectrophotometer with Dual Light-Emitting Diode,Journal of Flow Injection Analysis,0911775X,Japanese Association for Flow Injection Analysis,2009,26,2,139,https://cir.nii.ac.jp/crid/1390001288066672512,https://doi.org/10.24688/jfia.26.2_139