Trace metal determination by dc resistance changes of microstructured thin gold film electrodes

1999 ◽  
Vol 44 (21-22) ◽  
pp. 3761-3768 ◽  
Author(s):  
O Glück ◽  
M.J Schöning ◽  
H Lüth ◽  
A Otto ◽  
H Emons
Keyword(s):  
Trace Metal ◽  
Gold Film ◽  
Thin Gold Film ◽  
Metal Determination ◽  
Trace Metal Determination ◽  
Dc Resistance

Enhanced spectrophotometric methods for trace metal determination in waters: zinc as an example

2012 ◽  
Vol 4 (1) ◽  
pp. 147-152 ◽  
Author(s):  
Juan J. Pinto ◽  
Manuel García-Vargas ◽  
Carlos Moreno
Keyword(s):  
Trace Metal ◽  
Metal Determination ◽  
Spectrophotometric Methods ◽  
Trace Metal Determination

Trace Metal Determination by Crystalline Energy Transfer

1971 ◽  
Vol 25 (5) ◽  
pp. 550-553
Author(s):  
F. E. Lyrle ◽  
L. H. Arnold
Keyword(s):  
Energy Transfer ◽  
Detection Limit ◽  
Trace Metal ◽  
First Principles ◽  
Metal Determination ◽  
Trace Metal Determination ◽  
Quenching Analysis ◽  
Fixed Concentration

An expression is derived from first principles that indicates a 104 improvement in the detection limit for trace metal analyses by use of crystalline energy transfer instead of normal luminescence methods. These calculations were experimentally verified by examining a crystal comprised of tris-(2,2′-bipyridine) zinc (ii) dichloride [Zn(bipyr)3Cl2] as the host and tris-(2,2′-bipyridine) ruthenium (ii) dichloride [Ru(bipyr)3Cl2] as the emitting guest. With this system subnanogram levels of ruthenium could be measured. To verify the possibility of crystalline energy transfer quenching analysis a three component crystal was examined that had a fixed concentration of the ruthenium chelate and a varying amount of tris-(2,2′-bipyridine) iron (ii) dichloride [Fe(bipyr)3Cl2] as the quenching agent. With this system nanogram levels of iron could be measured.

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