Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SHIKI Masaharu and YAMAMOTO Koichi,"Spectrophotometric Determination of Iron(II) by Using Chitosan Coprecipitation with 1,10-phenanthroline and Tetrabromophenolphthalein Ethyl Ester",BUNSEKI KAGAKU,05251931,The Japan Society for Analytical Chemistry,2006,55,9,727-732,https://cir.nii.ac.jp/crid/1390282679331364480,https://doi.org/10.2116/bunsekikagaku.55.727