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首页> 外文期刊>Environmental Science & Technology >Response of the Cu(Ⅱ) Ion Selective Electrode to Cu Titration in Artificial and Natural Shore Seawater and in the Measurement of the Cu Complexation Capacity
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Response of the Cu(Ⅱ) Ion Selective Electrode to Cu Titration in Artificial and Natural Shore Seawater and in the Measurement of the Cu Complexation Capacity

机译:人工和天然岸海水中Cu(Ⅱ)离子选择电极对Cu滴定的响应及Cu络合能力的测定

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摘要

The Orion 94-29 Cu(Ⅱ) jalpaite ion selective electrode (Cu-ISE) was used to measure both the concentration of the aqueous free Cu(ll) ion ([Cu(Ⅱ)_(aq)]) and its changes due to additions of Cu, in artificial seawater (ASW) and in seawater from San Diego Bay, CA. The range of free copper ion (i.e., pCu, -log [Cu(Ⅱ)_(aq)]) determined in seawater samples from the San Diego Bay area (11.3-12.6, 11.9 +-0.4, average +- SD) is consistent with that previously reported for estuarine and coastal areas (10.9-14.1). The changes in [Cu(Ⅱ)_(aq)] as a result of the additions of Cu were used to determine the Cu complexation capacity (Cu-CC), which has a measured range (2.7 x 10~(-8)-2.0 x 10~(-7) M; 7.6 x 10~(-8) +- 4.8 x 10~(-8) M) comparable to the range of values previously reported for estuarine and coastal zones (i.e., L_1 + L_2, 1.1 x 10~(-8)-2.0 x 10~(-7) M). The narrow range of pCu at the Cu-CC (pCu_(Cu-CC), 11.1-11.9, 11.5 +- 0.2) indicates the predominant role of the Cu-CC in regulating the concentration of ambient Cu(Ⅱ)_(aq) to a level ≤ 1 x 10~(-11) M Cu-(Ⅱ)_(aq). These results attest to the capability of the Cu-ISE to measure pCu and Cu-CC in aquatic coastal environments with relatively high total Cu concentrations and organic loads, such as those from heavily used coasts and bays.
机译:使用Orion 94-29 Cu(Ⅱ)铝辉石离子选择电极(Cu-ISE)来测量游离Cu(II)水溶液([Cu(Ⅱ)_(aq)])的浓度及其变化。加利福尼亚州圣地亚哥湾的人工海水(ASW)和海水中添加的铜。在圣地亚哥湾地区(11.3-12.6,11.9 + -0.4,平均值±SD)的海水样品中测定的游离铜离子的范围(即,pCu,-log [Cu(Ⅱ)_(aq)])为与先前针对河口和沿海地区的报道(10.9-14.1)一致。由于添加了Cu而导致的[Cu(Ⅱ)_(aq)]的变化被用于确定Cu络合能力(Cu-CC),其测量范围为(2.7 x 10〜(-8)- 2.0 x 10〜(-7)M; 7.6 x 10〜(-8)+-4.8 x 10〜(-8)M),相当于先前报道的河口和沿海地区的值范围(即L_1 + L_2, 1.1 x 10〜(-8)-2.0 x 10〜(-7)M)。在Cu-CC处pCu的窄范围(pCu_(Cu-CC),11.1-11.9,11.5 +-0.2)表明Cu-CC在调节环境Cu(Ⅱ)_(aq)浓度中起主要作用达到≤1 x 10〜(-11)M Cu-(Ⅱ)_(aq)的水平。这些结果证明了Cu-ISE在具有较高总铜浓度和有机负荷的水生沿海环境中(例如来自频繁使用的海岸和海湾的)测量pCu和Cu-CC的能力。

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  • 来源
    《Environmental Science & Technology》 |2004年第11期|p.3139-3147|共9页
  • 作者单位

    SPAWAR Systems Center San Diego, Code 2361, 53560 Hull Street, San Diego, California 92152-5001;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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