made by VocPrez  for NVS

Concept

Scripps Institution of Oceanography total alkalinity titration system

URI http://vocab.nerc.ac.uk/collection/L22/current/TOOL1851/
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
Has Current Version 1
version 1
inScheme http://vocab.nerc.ac.uk/scheme/SDNDEV/current/
Broader L05:LAB12 titrators Mapping: 1742336
Related B75:ORG00134 Scripps Institution of Oceanography Mapping: 1742338
L35:MAN0039 Scripps Institution of Oceanography Mapping: 1742340

Alternate Formats

Other formats for this page:

RDF/XML Turtle JSON-LD

Alternate 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.