均一液液抽出を用いる高感度スマートデバイス分析法の開発と性能評価

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タイトル別名
  • Development of High Sensitive Smart Device Analysis with Homogeneous Liquid-Liquid Extraction
  • キンイツエキエキ チュウシュツ オ モチイル コウカンド スマートデバイス ブンセキホウ ノ カイハツ ト セイノウ ヒョウカ

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<p>A smart device such, as a smartphone on a tablet, is widely used worldwide, because of many functions with low cost. We reported on a smart device color analyzer consisting of original attachment and application software. This method is able to strongly reduce the analytical cost and size. Moreover, the analytical result was displayed to a map using GPS and a mapping function of smart device. However, the low sensitivity of this technique makes it difficult to determine low concentrations. On the other hand, homogeneous liquid-liquid extraction is an effective preconcentration method with a rapid and high concentration ratio because the analyte can be concentrated from a milliliter-scale sample to a microliter-scale extraction phase at a high concentration rate in a short period of time. Using this preconcentration, the sensitivity of colorimetry can be improved. Based on these findings, in this study, we developed an optional attachment for the smart device color analysis of a sedimented phase from homogeneous liquid-liquid extraction. The analytical performance of proposed method was evaluated. Using the extraction of the hexavalent chromium complex with diphenylcarbazide by a water/2-propanol/dimethyl phthalate system, the ppb level of hexavalent chromium could be determined. By comparing with conventional absorption spectrophotometry, the proposed method has satisfied analytical performance as a simple analysis.</p>

収録刊行物

  • 分析化学

    分析化学 68 (6), 411-415, 2019-06-05

    公益社団法人 日本分析化学会

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