Concept
Automated Coulometer (Robinson and Williams, 1992)
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL0635/ |
|---|---|
| Within Vocab | SeaVoX Device Catalogue |
| Preferred Label | Automated Coulometer (Robinson and Williams, 1992) |
| Definition | An automated coulometric titration system used for the continual measurement of dissolved inorganic carbon (TCO2), developed by Robinson and Williams (1992). The instrument consists of a sampling pipette, CO2 extractor-stripper, scrubbers and a coulometer interfaced with a PC. The equivalence point is detected photometrically with thymolphthalein as the indicator. It is based on the Johnson et al. (1987) 5011 coulometer manufactured by UIC, but with a number of improvements, including: improved analytical time of 6 minutes; solid state optical liquid-level switches; a three-way mixer valve to allow interchange between sample and standard input; and replacement of PTFE tubing with stainless steel. The Robinson and Williams (1992) coulometer achieves an analytical precision (1 SD) of +/-0.5-1.0 umol/kg (0.025-0.05 percent) and accuracy of 0.15 percent. |
| Broader |
L05:
autoanalysers L05: titrators |
| Related |
B75:
Bangor University, School of Ocean Sciences |
| Note | accepted |
| Deprecated | false |
| Alternative Label | Automated coulometer |
| Version | 1 |
| Has Current Version | http://vocab.nerc.ac.uk/collection/L22/current/TOOL0635/1/ |
| Authored On | 2013-08-14 15:42:08 |
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