銅(II)-ニトロソナフトールジスルホン酸塩錯体のキチンへの吸着濃縮 : メタル炉原子吸光分析(<特集>:分離(その1))(予備濃縮分離)

DOI NDLデジタルコレクション Web Site Web Site 被引用文献8件 参考文献24件

書誌事項

タイトル別名
  • Preconcentration of Cu(II)-nitrosonaphtholdisulfonate complex on the chitin/metal-furnace AAS.
  • 銅（ＩＩ）‐ニトロソナフトールジスルホン酸塩錯体のキチンへの吸着濃縮／メタル炉原子吸光分析
  • ドウ 2 ニトロソナフトールジスルホンサンエン サクタイ ノ キチン エ ノ

この論文をさがす

抄録

Copper(II) is adsorbed as its anionic complex with 1-nitroso-2-naphthol-3, 6-disulfonic acid disodium salt (Nitroso R salt, NR) on chitin, because chitin is protonated in an acidic medium, and acts as an anion adsorbent. A simple and rapid determination method of trace amounts of Cu(II) by metal-furnace AAS using direct heating of metal-adsorbed chitin was thus investigated. The obtained method is as follows. To 1001000 cm3 of a sample solution containing less than 0.5 μg of Cu(II), add 2.0 cm3 of 10-2 mol dm -3 NR solution and 50 mg of chitin. The pH is then adjusted to 4.0 using dilute ammonia water and nitric acid. The chitin which adsorbs the Cu · NR is separated from the sample solution by filtration. The chitin on the filter paper is dispersed in 5.0 cm3 of water. After shaking, 10 μl of the suspension is directly injected into the tungsten matal-furnace. The absorbance is measured at 324.7 nm by metal-furnace AAS. The calibration curve was liner below 0.5 μgCu(II)/100 cm3 (aqueous phase). The relative standard deviations (n = 8) were 4.2% for 0.3 μgCu(II)/100 cm3, 4.8% for 0.1 μgCu (11)/100 cm3. The determination limits (S / N ≥3) were 0.03 μgCu(II)/100 cm3 (0.3 ppb). The proposed method was applied to the determination of Cu(II) in several water samples. The adsorption isotherm of Cu·NR on the chitin was found to be fitted by the Freundlich equation.

収録刊行物

  • 分析化学

    分析化学 42 (11), 767-771, 1993

    公益社団法人 日本分析化学会

被引用文献 (8)*注記

もっと見る

参考文献 (24)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ