フローインジェクション-オンラインイオン交換前濃縮-ICP発光分析法による鉄鋼中モリブデンの高感度定量

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タイトル別名
  • Sensitive Determination of Molybdenum in Steel by Flow Injection-On-line Ion-exchange Preconcentration-ICP-Atomic Emission Spectrometry
  • フローインジェクション オンライン イオン コウカン マエ ノウシュク ICP ハッコウ ブンセキ ホウ ニ ヨル テッコウ チュウ モリブデン ノ コウカンド テイリョウ

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A sensitive method for the determination of molybdenum in steel has been developed by flow injection-online ion-exchange preconcentration-ICP-AES. Sample is decomposed with a mixed acid by a microwave-assisted digestion. Excess acids are removed by evaporation and the residue is taken up in 0.05 M sulfuric acid and an 50μl aliquot of the sample solution is injected into the flow injection analysis system. Molybdenum in the sample solution is adsorbed on a TEVA resin column and then eluted with 7 M nitric acid. The effluent containing molybdenum is introduced directly into a ultrasonic nebulizer of ICP-AES. The valves and pumps in the flow system are operated automatically by a personal computer. The analytical results obtained for molybdenum at a 0.01 m/m% level in the steel certified reference materials are in good agreement with certified values and the precision (R.S.D.=2.3-2.5%) is satisfactory. The detection limit estimated as 3σ of the background noise is 0.8 ng molybdenum, which corresponds to 8 μg Mo/g when 50 mg of steel sample is analyzed.

収録刊行物

  • 鉄と鋼

    鉄と鋼 89 (9), 939-942, 2003

    一般社団法人 日本鉄鋼協会

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