Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7699320 | Marine Chemistry | 2015 | 6 Pages |
Abstract
Building on the spectrophotometric procedure of Yao and Byrne (1998), an automated analysis system has been developed for laboratory and shipboard measurements of total alkalinity at a rate of 6 samples per hour. The system is based on single-point hydrochloric acid (HCl) titrations of seawater samples of a known volume with bromocresol purple as an indicator. The titration is continuously monitored using visible spectroscopy to guide the titration rate according to the real-time pH of the samples. Each titration is terminated just below the equivalence point to achieve a precision and accuracy near 1 μmol kgâ 1.
Related Topics
Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Xuewu Liu, Robert H. Byrne, Michael Lindemuth, Regina Easley, Jeremy T. Mathis,