固相抽出による海水中有機スズ化合物の濃縮分離

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  • Special Articles: Environmental Sciences and Analytical Chemistry. Solid phase extraction of organotin compounds in seawater.
  • 特集　環境科学と分析化学　固相抽出による海水中有機スズ化合物の濃縮分離
  • コソウ チュウシュツ ニ ヨル カイスイチュウ ユウキ スズ カゴウブツ ノ

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For the speciation of ultra trace organotin compounds, a technique for separation and preconcentration, such as organic solvent extraction, is useful. However, a solid phase extraction (SPE) is preferable from the viewpoint of environmental pollution. The SPE of comparatively large amounts of organotin compounds in seawater has been developed using a polymer of styrene derivative/metacrylic ester as a solid phase sorbent. The sorbent (500 mg) was put into a 8 ml reservior. Recovery of organotin was measured by AAS. In pure water containing organotin compounds (TBT, TPT) there was almost100% recovery in the range of pH 0.258.0, while in the 2.45% sodium chloride solution(equivalent to the sodium chloride content in seawater) the recoveries decreased to about 5060%. This problem was resolved by adding methanol. To prepare sample solutions, methanol was added to be 50% (v/v), in artificial seawater samples containing organotin standard solutions and the pH was adjusted to 0.5 with nitric acid. The water samples were forced through the cartridge at a flow rate of 4.55.0 ml min-1. Elution was by gravity flow of 10 ml methanol. Recoveries of TPT and TBT were more than 90%, while those of DPT and DBT were about 30 and 60%, respectively.

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  • 分析化学

    分析化学 43 (11), 933-938, 1994

    公益社団法人 日本分析化学会

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