Meyer S, Scholz F, Trittler R
Fachinstitut für Angewandte Analytik und Umweltchemie Institut für Chemie, Humboldt-Universität, Hessische Strasse 1-2, D-10115, Berlin, Germany.
Anal Bioanal Chem. 1996 Sep;356(3-4):247-52. doi: 10.1007/s0021663560247.
A new method is described for the reliable and ultrasensitive determination of inorganic ionic mercury, using differential-pulse anodic stripping voltammetry on a glassy carbon electrode. It has been possible to determine mercury down to a concentration of 5x10(-14) mol l(-1) (the lowest detection limit ever reported for a voltammetric method). This success was achieved by using a thiocyanate electrolyte and relatively long deposition times. The mercury ions are stabilized in the solution by the formation of strong thiocyanate complexes. This leads to a highly reproducible cathodic plating and anodic dissolution of mercury. A speciation analysis allowing to distinguish between dissolved atomic and ionic mercury in water is possible.
描述了一种使用玻碳电极上的差分脉冲阳极溶出伏安法可靠且超灵敏地测定无机离子汞的新方法。已能够测定低至5×10⁻¹⁴摩尔/升浓度的汞（这是伏安法报道过的最低检测限）。通过使用硫氰酸盐电解质和相对较长的沉积时间取得了这一成功。汞离子通过形成强硫氰酸盐络合物在溶液中得以稳定。这导致汞的阴极电镀和阳极溶解具有高度的重现性。进行区分水中溶解的原子汞和离子汞的形态分析是可行的。
