CAPILLARY BEHAVIOR IN HIGH SENSITIVITY POLAROGRAPHY

Journal Article · Tue Aug 01 04:00:00 EDT 1961 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60177a024· OSTI ID:4022901

Cooke, W D; Kelley, M T; Fisher, D J

A study was undertaken to ascertain the factcrs that limit the sensitivity of polarography with the dropping mercury electrode. Some sources of the capillary noise were discovered and a capillary was designed which greatly reduces the erratic nature of polarographic backgrounds at high sensitivity and extends the scope of polarographic methods to more dilute solutions. By using an ORNL Model Q1988-ES controlled-potential and derivative polarograph with modified capillaries, it is possible to detect reducible spedies which would give di fusion currents as small as 0.0002 mu a by conventional methods. In the case of zinc, tais corresponds to a concentration of 0.006 mu g per nfl. The results of the investigation emphasize that the mechanical design of the dropping mercury capillary is an important polarographic parameter. (auth)

• Research Organization: Cornell Univ., Ithaca, N.Y.
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-024816
• OSTI ID: 4022901
• Journal Information: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 33; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BEHAVIOR
CAPILLARIES
CHEMISTRY
DIFFUSION
ELECTRODES
MERCURY
PLANNING
POLAROGRAPHY
SENSITIVITY
ZINC