Concept
Scripps Institution of Oceanography total alkalinity titration system
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1851/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | Scripps TA titration system | ||
| Definition | A laboratory titration system designed to measure the total alkalinity of discrete seawater samples. The system is based on the Metrohm 876 Dosimat Plus, with a calibrated 5 ml exchange unit. It also uses an Agilent 34970A Data Acquisition/Data Logger Switch Unit with a custom-made unity gain amplifier. The recommended pH electrode is the Metrohm Ecotrode Plus. The system uses a potentiometric titration method: The sample is acidified to a pH of 3.6. The evolved CO2 is removed, and the titration continues to a pH of 3. The equivalence point corresponding to the total alkalinity is evaluated from titration points in the pH region 3.0 to 3.5 using a non-linear least-squares procedure. This corrects for the reactions with sulfate and fluoride ions present in the seawater. The system includes a desktop computer with LabVIEW 2013 software. Recommended titration temperature is 20 degC. Sample volume is 125 ml. Initial start-up takes approximately 1 hour, with a measurement throughput of 4 - 6 per hour. Power line frequency is 60 Hz. | ||
| Date | 2022-10-04T10:24:29 | ||
| Identifier | SDN:L22::TOOL1851 | ||
| Note | accepted | ||
| Is Version Of | TOOL1851 | ||
| version | 1 | ||
| Broader | L05:LAB12 |
titrators | |
| Related | B75:ORG00134 |
Scripps Institution of Oceanography | |
L35:MAN0039 |
Scripps Institution of Oceanography | ||
Alternate Formats
Other formats for this page:
RDF/XML Turtle JSON-LDAlternate Profiles
Other views of this page:
Alternate Profiles ?Different Media Types (HTML, text, RDF, JSON etc.) and different information model views, profiles, are available for this resource.
NVS html view ? Default NVS html view.
