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A portable flow injection analyzer for use with ion‐selective electrodes
Author(s) -
Dimitrakopoulos Telis,
Alexander Peter W.,
Hibbert D. Brynn,
Cherkson Len,
Morgan John
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140071204
Subject(s) - electrode , peristaltic pump , analytical chemistry (journal) , materials science , software portability , spectrum analyzer , calibration , battery (electricity) , iodide , ion , range (aeronautics) , electrical engineering , chemistry , computer science , chromatography , inorganic chemistry , physics , engineering , power (physics) , organic chemistry , quantum mechanics , meteorology , programming language , composite material
A battery powered portable monitor based on flow injection potentiometry has been developed weighing 1.8 kg, constructed in a carry‐case and applicable for remote site monitoring. Portability has been achieved using a light weight rechargeable Ni‐Cd battery‐pack (7.2 V). The flow injection manifold incorporates a low powered peristaltic pump, a wall‐jet type flow cell containing a commercial iodide ion‐selective electrode and a Ag/AgCl reference electrode connected to an analog‐to‐digital converter, also powered by the battery pack, and a RS232‐serial output to a notebook computer for real‐time data display and storage. The system performance has been evaluated using the iodide ion‐selective electrode, including the effects of various carrier solutions on sample peak heights, peak widths and the calibration slopes and working ranges. Fast response with peak widths as low as approximately 10 s. was observed with near Nernstian response of −53.8 mV change per activity decade and a log‐linear range between 5 × 10 −6 and 1 × 10 −2 M in a 0.1 M sodium acetate carrier stream.