超音波抽出‐ジフェニルカルバジド吸光光度法による土壌中の溶出性クロム(VI)の現場定量

書誌事項

タイトル別名
  • Field Determination of Leachable Chromium(VI) in Soil by Ultrasonic Extraction-Diphenylcarbazide Colorimetry
  • 超音波抽出-ジフェニルカルバジド吸光光度法による土壌中の溶出性クロム(6)の現場定量
  • チョウオンパ チュウシュツ ジフェニルカルバジド キュウコウ コウドホウ ニ ヨル ドジョウチュウ ノ ヨウシュツセイ クロム 6 ノ ゲンバ テイリョウ

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説明

A simple and fast field method was developed for the determination of leachable Cr(VI) in soil by ultrasonic extraction and colorimetry with 1,5-diphenylcarbonohydrazide. Extraction from 2.0 g of a sample with 20 mL of water was accomplished with 30 min under ultrasonication (46 kHz, 15 W). The extraction was repeatable with a relative standard deviation of 10%. The extraction characteristics were discussed based on elution kinetics. The water-leachable concentrations of Cr(VI) or the total Cr were comparable to those obtained by the shaking extraction (6 h) used in Notification 46 of Environmental Agency of Japan. A detection limit of 0.003 mg/L was obtained by a laboratory-made colorimeter with a RGB light-emitting diode. The proposed method is applicable for soil samples containing no Cr(VI)-reducing matters, e.g., humic substances.<br>

収録刊行物

  • 分析化学

    分析化学 56 (4), 231-235, 2007

    公益社団法人 日本分析化学会

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