<論文>フローインジェクション分析法による海水中の溶存態ケイ素の定量

概要

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A Flow Injection Analysis (FIA) system was developed for the rapid and automatic determination of trace silicon in seawater, based on the molybdenum blue absorption spectrophotometry. A sample, a molybdic acid reagent, and a reducing reagent are continuously pumped at a flow rate of 2 ml/min. The mixed solution is introduced into a reaction tube in the water bath at 50℃. The absorbance at 810 nm is recorded to measure the concentration of silicon in seawater samples by using a 1 cm flow cell. It takes 47 sec. for one sample of ca. 1.3 ml. By this method, we could eliminate to use oxalic acid as a masking reagent for the interference of phosphate. The measured values with this method were agreed well with the values obtained by the manual analytical technique for seawater samples collected from the Japan Sea.
北海道東海大学の論文
1996-03-21