ポリウレタンフォームと1,10-フェナントロリンを用いる鉄(II)のサイクリックフローインジェクション分析法(<特集>若手研究者の初論文特集)

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The spectrophotometric determination of Fe(II) with 1,10-phenanthroline (phen) was carried out by a cyclic flow-injection analysis. Tandem glass columns (4 mm i.d., 8 cm long, each) packed with polyurethane foam (PUF, weight; 0.16g×2) for the removal of Fe(II)-(Phen)_3 complex were incorporated in the system, allowing a repetitive determination of Fe(II). A solution of 2.0×10^<-3>M phen and 5.0×10^<-4>M sodium dodecyl sulfate (SDS) in a 0.1 M acetate buffer (pH 4.7) in a single reservoir (50 ml) was continuously circulated at a constant flow rate of 1.5 ml min^<-1>. Into the stream, an aliquot (5μl) of a sample containing Fe(II) was injected by means of a 6-way valve. The formed complex was monitored spectophotometrically at 510 nm. The stream was passed through glass columns, which were introduced after the flow-through cell, and then returned to the reservoir. The colored Fe(II)-(phen)_3-SDS ion associates were adsorbed onto PUF, which allowed a baseline constant, and made it possible to adopt a cyclic FIA. This method allowed as many as 100 repetitive determinations of 6 ppm Fe(II) solutions with the same 50 ml of the circulating solution.
社団法人日本分析化学会の論文
2004-09-05