24 A
ANALYTICAL
CHEMISTRY
Fisher ELECDROPODE (Reg. U. S. Pat. Off.)
The Standard Instrument for Conducting Analyses by the Dropping Mercury Electrode
Technique ^
The Fisher Elecdropode can be employed for rapid qualitative and quantitative analyses in both organic and inorganic chemistry. It is compact; its manipulation is quite simple and its applications are both numerous and varied.
Principle of the Elecdropode
Method
The presence of each p a r t i c u l a r ion is indicated by an increase in t h e curiiieiai a t a specific voltage. CDhe «xtent of t h e increase depends upon t h e concent r a t i o n of t h e ion.
Analyses are made with the Elecdropode in a few minutes by making measurements of the currents which result when a series of potentials are applied to drops of mercury as they fall through the solution being analyzed. Samples as small as 0.00001 (1/100,000) equivalents per liter can be analyzed. The dropping mercury technique has been successfully applied to such analyses as lead in citric acid; copper, lead and zinc in commercial zinc; copper, nickel and cobalt in steels; elements in the ash of plant tissue; traces of dyes, lyophilic colloids, fatty acids and alkaloids—to name only a few. Fisher Elecdropode, with standard cell, galvanometer, a test solution and complete instructions. Each, $310.00
Headquarters
FISHER SCIENTIFIC Co. 717 Forbes St., Pittsburgh (19), Pa. 2109 Locust St., St. Louis (3), M o .
for Laboratory
Equipment
EIMER AND A M E N D G r e e n w i c h and M o r t o n S t r e e t s N e w York (14), N e w York
In Canada: Fisher Scientific Co., Ltd., 9 0 4 St. James Street, Montreal, Quebec
