Spectroelectrochemical sensing based on attenuated total internal reflectance stripping voltammetry. 2. Determination of mercury and lead
Spectroelectrochemical sensing based on attenuated total internal reflectance stripping voltammetry. 2. Determination of mercury and lead
复制标题
DOI：
10.1021/ac034830h
复制
发表时间：
2004-03-01
影响因子：
7.4
通讯作者：
Heineman, WR
中科院分区：
文献类型：
--
作者：
Maghasi, AT;Conklin, SD;Heineman, WR
Detection of lead and mercury by attenuated total internal reflectance spectroscopy coupled to stripping voltammetry is demonstrated. Changes in attenuation of light passing through an indium tin oxide optically transparent electrode (ITO-OTE) accompany the electrodeposition and stripping of lead and mercury on the electrode surface. The change in absorbance during stripping of electrode-posited metal constitutes the analytical response that enables detection over a range of 2.5 x 10(-7) -5 x 10(-5) and 5 x 10(-8) -5 x 10(-5) M for mercury and lead, respectively. The spectroelectrochemical responses of mercury and lead on the ITO surface are characterized and optimized with respect to solution conditions, the potential excitation signals used for deposition and stripping, and wavelength for detection. The deposited metals were examined by environmental scanning electron miscroscopy, and the electrodeposition pattern of lead and mercury was found to influence the optical response.
