銅(II)-N, N-ジエチルジチオカルバメート錯体のメンブランフィルター捕集/直接導入黒鉛炉原子吸光法による微量銅の定量

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タイトル別名
  • Direct AAS determination of trace copper in water as copper(II)-N,N-diethyldithiocarbamate complex on membrane filter.
  • 銅（ＩＩ）‐Ｎ，Ｎ‐ジエチルジチオカルバメート錯体のメンブランフィルター捕集／直接導入黒鉛炉原子吸光法による微量銅の定量
  • ドウ 2 N N ジエチルジチオカルバメート サクタイ ノ メンブラン フィ

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抄録

A simple method is investigated for direct determination of trace copper in water by graphite furnace AAS: the copper(II)-N, N-diethyldithiocarbamate (DDTC) complex is collected on a membrane filter, a portion of which is then directly transferred to a graphite furnace. The analytical procedure is as follows : 5ml of 2% diammonium hydrogen citrate and 2ml of 0.5% DDTC are added to a 250 ml sample solution (pH 9), containing less than 0.60ng/ml of copper(II). After about 10 min, copper(II)is quantitatively collected on a cellulose-acetate membrane filter (diam.: 17.2mm, pore size : 0.45μm)by suction filtration. For direct AAS determination, a small disc (diam.: 2.0mm)is removed from the membrane filter with a paper punch and introduced into a graphite furnace. The optimal thermal programs are as follows : drying at 160°C for 60 s, ashing at 600°C for 30 s, atomization at 2600°C for 5 s in argon gas atmosphere (flow rate 2.0l/min). The 324.8nm line was used to quantity copper by the peak-area method with deuterium lamp-background correction. The relative standard deviation [for the determination of 2.44ng/ml copper in spring water] was 4.0% for 6 replicate measurements.

収録刊行物

  • 分析化学

    分析化学 45 (10), 909-914, 1996

    公益社団法人 日本分析化学会

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