Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MATSUMOTO Tomoko and HIROSE Daiki and YAMAUCHI Ayaka and MATSUMOTO Jin and SHIRAGAMI Tsutomu and FUEDA Yoshiyuki and YASUDA Masahide,Measurement of Acidity of Magnesium Salts-Silica Gel Composites by Microscopic Absorption Spectrometry Using Porphyrin as pH-indicator,BUNSEKI KAGAKU,05251931,The Japan Society for Analytical Chemistry,2012,61,10,851-856,https://cir.nii.ac.jp/crid/1390282679636890112,https://doi.org/10.2116/bunsekikagaku.61.851