Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HOSHI Suwaru and KAMADA Yoshiaki and INOUE Sadanobu and MATSUBARA Mutsuya,Preconcentration of colored metal complexes on a natural polymer chitin and its application to spectrophotometric determination of metal ions.,Analytical Sciences,0910-6340,The Japan Society for Analytical Chemistry,1988,4,2,227-228,https://cir.nii.ac.jp/crid/1390282679232339968,https://doi.org/10.2116/analsci.4.227