Purification and Physical–Chemical Characterization of Bromocresol Purple for Carbon System Measurements in Freshwaters, Estuaries, and Oceans
Ellie Hudson‐Heck, Xuewu Liu, Robert H. Byrne
Abstract
value determined for purified BCP in this study can be used with previously published procedures to correct BCP absorbance measurements obtained using off-the-shelf (unpurified) BCP. This work provides a method for purifying BCP, fills a critical gap in the suite of available purified sulfonephthalein indicators, enables high-quality spectrophotometric measurements of total alkalinity, and facilitates pH measurements in freshwater, estuarine, and ocean environments within the range 4.0 ≤ pH ≤ 7.5.
Topics & Concepts
SeawaterBromocresol greenAbsorbanceAlkalinityMolar absorptivitySalinityChemistryBromocresol purpleAnalytical Chemistry (journal)pH indicatorDissociation constantEnvironmental chemistryChromatographyGeologyOceanographyPhysicsOpticsPhysical chemistryBiochemistryOrganic chemistryReceptorAnalytical Chemistry and SensorsWater Quality Monitoring and AnalysisElectrochemical Analysis and Applications