An Improved Analytical Method for Atmospheric Chlorides in Tropic Tests
Abstract
A methodology investigation was recently completed at the US Army Tropic Test Center in the Canal Zone to develop an improved analytical method for rapid determination of water-soluble chlorides. For the past 8 years, ambient salt has been measured for corrosion studies by wet-candle sampling and determining water-soluble chlorides by manual mercuric nitrate titration using diphenylcarbazone-bromphenol blue indicator. Two experimental methods, select ion electrode and flame emission for sodium, were evaluated against the standard mercuric nitrate method. Flame emission for sodium, using an empirical chloride to sodium ratio of 1.69, provides the best estimate of chloride concentration to the mercuric nitrate method and results were well within the error limitations of the wet-candle sampling method. The investigation showed that by using flame emission, instead of the mercuric nitrate titration, time for laboratory work was halved. It was recommended that the new method be adopted as standard operating procedure at the Tropic Test Center, thereby realizing a savings/ investment ratio of 1.17 and a 17 percent rate of return of the initial cost of the investigation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1975
- Accession Number
- ADA020110
Entities
People
- J. F. Sprouse