start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=85 end-page=88 dt-received= dt-revised= dt-accepted= dt-pub-year=1989 dt-pub=19890210 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Spectrophotometric Determination of Silicate in Water with Molybdate and Malachite Green en-subtitle= kn-subtitle= en-abstract= kn-abstract=On the basis of the coloration formed with molybdosilicate and Malachite Green in aqueous solution, trace amounts of silicate were determined. In an acidic medium, silicate reacted with molybdate to form molybdosilicate, which reacted with Malachite Green to form a colored ion association complex. The color was stabilized by adding poly(vinyl alcohol). The molar absorptivity was 1.0×10(5)mol(-1)cm(-1) at 595nm, and the absorbance of the reagent blank was 0.089. The recommended concentration range of silicon was 0.1-5μg and the limit of detection was 0.01μg of silicon. Silicate in river and tap waters was determined. en-copyright= kn-copyright= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=1 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=2 ORCID= en-aut-name=OjimaYuka en-aut-sei=Ojima en-aut-mei=Yuka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=Spectrophotometry kn-keyword=Spectrophotometry en-keyword=silicate determination kn-keyword=silicate determination en-keyword=molybdate kn-keyword=molybdate en-keyword=Malachite Green kn-keyword=Malachite Green en-keyword=ion association complex kn-keyword=ion association complex END