Sequential injection methodology for carbon speciation in bathing waters

Membrane-based Separation in Flow Analysis for Environmental and Food Applications

“…Successful applications of this hyphenation can be observed in: the determination of bromide and sulfide in tap and wastewater by spectrophotometry (50,55); chlorine dioxide in water by fluorescence (47); and ammonia and inorganic carbon in water with an acidbased indicator by spectrophotometry (42,44), conductimetry (36,38,56,58) and fluorescence (41,49). Due to the high selectivity of GD membranes, most of the methods combine membrane-based separations with non-selective detectors such as spectrophotometric and conductimetric detection where the color change of acid-base indicators or conductivity changes are measured (36,38,40,42,44,48,50,(54)(55)(56)58,59). Fluorescence and chemiluminescence detectors are usually chosen when lower detection limits are intended as these are sensitive techniques (37,39,41,43,47,49).…”

A critical review on photochemical conversions in flow analysis

“…In spite of the predominance of flow injection with confluent streams and continuous solution pumping, other flow approaches (e.g. multicommutation [61], multipumping [62,63], flow-batch [55], and sequential injection analysis, SIA [64][65][66]) as well as sampling strategies (e.g. merging zones [18]) have also been successfully exploited.…”

“…Selectivity was enhanced by acidifying the medium and separating the generated CO 2 from the matrix in a gas diffusion chamber. Spectrophotometric detection was carried out into a cresol red[103] or bromocresol green[64] acceptor stream. Digestion times of 156[64] and 240 s[103] …”

“…Spectrophotometric detection was carried out into a cresol red[103] or bromocresol green[64] acceptor stream. Digestion times of 156[64] and 240 s[103] …”

Flow injection analysis as a tool for enhancing oceanographic nutrient measurements—A review

“…Whilst this effect may be overcome by the addition of hydroxylamine to the indicator stream [176], or by the use of conductimetric detection, there has been little application of FIA/SIA to seawater DOC analysis. Santos et al recently described a SIA system for the determination of DIC, free dissolved carbon dioxide (CO 2 ), TC, DOC and alkalinity in inland waters [179]. With minor modification, e.g.…”