Automated Coulometer (Robinson and Williams, 1992)
|Within Vocab||SeaVoX Device Catalogue|
|Alternative Labels||Automated coulometer|
|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.|
|Has Current Version||1|
|L05 SeaDataNet device categories - (2)|
||Bangor University, School of Ocean Sciences||Mapping: 1448592|
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