Comparison of alternate reactants for pM level cobalt analysis in seawater by the use of catalytic voltammetry

Baars O.; Croot P.L.

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Comparison of alternate reactants for pM level cobalt analysis in seawater by the use of catalytic voltammetry

机译：催化伏安法比较海水中pM级钴的替代反应物

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The analysis of Cobalt (Co) at low pM concentrations in seawater with Adsorptive Cathodic Stripping Voltammetry involves high concentrations of sodium nitrite (NaNO2) to enhance the signal in an electrocatalytic reaction. In this study we found three substitutes for NaNO2 that critically affected the sensitivity. Optimisation of a method with potassium bromate (KBrO3) resulted in an excellent detection limit (0.9 pM) after a 90s adsorption period. Reactant concentration and consumption were 10× reduced compared to protocols with NaNO2 and reagent blanks were lower. Accuracy and precision were verified with SAFe intercalibration standards and the method was applied using open ocean seawater samples. The reaction mechanism is discussed and differences to NaNO2 are shown.

机译：用吸附阴极溶出伏安法分析海水中低pM浓度的钴（Co）涉及高浓度的亚硝酸钠（NaNO2），以增强电催化反应中的信号。在这项研究中，我们发现了NaNO2的三种替代品，它们严重影响了灵敏度。溴酸钾（KBrO3）方法的优化导致90s吸附期后的出色检测限（0.9 pM）。与使用NaNO2的方案相比，反应物的浓度和消耗量减少了10倍，并且空白试剂的含量更低。使用SAFe相互校准标准验证了准确性和精密度，并且该方法适用于开放海水样本。讨论了反应机理，并显示了与NaNO2的区别。

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《Electroanalysis》 |2011年第7期|共8页
作者
Baars O.; Croot P.L.;
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正文语种 eng
中图分类电化学、电解、磁化学;
关键词
Bromate; Cobalt; Electrocatalysis; Seawater; Stripping voltammetry;

机译：溴酸盐;钴;电催化;海水;溶出伏安法;

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1. Comparison of alternate reactants for pM level cobalt analysis in seawater by the use of catalytic voltammetry [J] . Baars O., Croot P.L. Electroanalysis . 2011,第7期

机译：催化伏安法比较海水中pM级钴的替代反应物
2. Determination of Cobalt in Seawater by Catalytic Adsorptive Cathodic Stripping Voltammetry [J] . Marisol Vega, Constant M.G.van den Berg Analytical Chemistry . 1997,第5期

机译：催化吸附阴极溶出伏安法测定海水中钴。
3. Determination of Picomolar Levels of Iron in Seawater Using Catalytic Cathodic Stripping Voltammetry [J] . Hajime Obata, Constant M. G. van den Berg Analytical chemistry . 2001,第11期

机译：催化阴极溶出伏安法测定海水中的痕量铁
4. Comparison of current reversal chronopotentiometry (CRC) and small amplitude cyclic voltammetry (SAC) method to determine the long-term corrosion tendency of copper- nickel alloys in polluted and unpolluted seawater under jet-impingement conditions [C] . Mahmoud R. Reda, Jamal N. Alhajji, American Society for Testing and Materials Symposium on corrosion testing in natural waters . 1997

机译：电流逆转时间计量测量（CRC）和小幅度循环伏安法（SAC）方法的比较确定喷射撞击条件下污染和未受污染海水中铜镍合金的长期腐蚀趋势
5. Determination of iron and iron-binding ligands in seawater with flow injection analysis and voltammetry. [D] . Lin, Hai. 2010

机译：流动注射分析和伏安法测定海水中的铁和铁结合配体。
6. Comparison and Analysis of Zinc and Cobalt-Based Systems as Catalytic Entities for the Hydration of Carbon Dioxide [O] . Edmond Y. Lau, Sergio E. Wong, Sarah E. Baker, -1

机译：锌和钴基体系作为二氧化碳水合反应的催化实体的比较和分析
7. Quantification of iron in seawater at the low picomolar range based on optimization of bromate/ammonia/dihydroxynaphtalene system by catalytic adsorptive cathodic stripping voltammetry [O] . Laglera, Luis M., Santos-Echeandía, Juan, Caprara, Salvatore, 2013

机译：催化吸附吸附溶出伏安法优化溴酸盐/氨水/二羟基萘系统下的低皮摩尔范围内的海水中铁的定量
8. Technology development for cobalt F-T catalysts. Topical report No.2, Comparison of patented F-T cobalt catalysts [R] . Oukaci, R. , Marcelin, G. , Goodwin, J. G. 1995

机译：钴F-T催化剂的技术开发。专题报告2，专利F-T钴催化剂的比较

Comparison of alternate reactants for pM level cobalt analysis in seawater by the use of catalytic voltammetry

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