Chronopotentiometric Stripping Analysis Using Gold Electrodes, an Efficient Technique for Mercury Quantification in Natural Waters

2005 ◽  
Vol 17 (9) ◽  
pp. 755-761 ◽  
Author(s):  
Marcio?Antonio Augelli ◽  
Rodrigo?Alejandro Abarza?Munoz ◽  
Eduardo?Mathias Richter ◽  
Amauri Gouveia?Junior ◽  
L�cio Angnes
Keyword(s):  
Natural Waters ◽  
Efficient Technique ◽  
Gold Electrodes ◽  
Stripping Analysis

Direct mercury determination in natural waters by chronopotentiometric stripping analysis in macroelectrode process vessel

Desalination ◽  
2009 ◽  
Vol 249 (1) ◽  
pp. 253-259 ◽  
Author(s):  
Jaroslava Švarc-Gajić ◽  
Zorica Stojanović ◽  
Zvonimir Suturović ◽  
Nikola Marjanović ◽  
Snežana Kravić
Keyword(s):  
Natural Waters ◽  
Mercury Determination ◽  
Stripping Analysis ◽  
Process Vessel

Characterization of machined polystyrene foam

1989 ◽  
Vol 47 ◽  
pp. 372-373
Author(s):  
C. W. Price ◽  
E. F. Lindsey ◽  
R. M. Franks ◽  
M. A. Lane
Keyword(s):  
Surface Finish ◽  
Cell Walls ◽  
Surface Structures ◽  
Efficient Technique ◽  
Low Density ◽  
Polystyrene Foam ◽  
Planar Surfaces ◽  
Machining Characteristics

Diamond-point turning is an efficient technique for machining low-density polystyrene foam, and the surface finish can be substantially improved by grinding. However, both diamond-point turning and grinding tend to tear and fracture cell walls and leave asperities formed by agglomerations of fragmented cell walls. Vibratoming is proving to be an excellent technique to form planar surfaces in polystyrene, and the machining characteristics of vibratoming and diamond-point turning are compared.Our work has demonstrated that proper evaluation of surface structures in low density polystyrene foam requires stereoscopic examinations; tilts of + and − 3 1/2 degrees were used for the stereo pairs. Coating does not seriously distort low-density polystyrene foam. Therefore, the specimens were gold-palladium coated and examined in a Hitachi S-800 FESEM at 5 kV.

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