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VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders
Published on: August 3, 2016
Novel flow injection-fluorometric method for the determination of trace silicate and its application to ultrapurified
Akhmad Sabarudin1, Mitsuko Oshima, Naoe Ishii
1Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushimanaka, Okayama, Japan.
Abstract:
A highly sensitive fluorescence quenching method for the determination of silicate based on the formation of an ion associate between molybdosilicate and Rhodamine B (RB) in nitric acid medium was developed. A flow injection system coupled with a fluorescence detector was used for the measurement of fluorescence intensity at 560 and 580 nm as excitation and emission wavelengths, respectively. The calibration graph for Si showed a linear range of 0.1-5 ng cm(-3) with correlation coefficient of 0.9999, and the detection limit of 0.06 ng cm(-3). The proposed method was successfully applied to the determination of silicate in ultrapurified water with satisfactory results.
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