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Study on the implementation of flow titrations in sequential injection analysis

✍ Scribed by J. M. Estela; F. Mas; A. Cladera; V. Cerdà

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
203 KB
Volume
11
Category
Article
ISSN
0895-7533

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✦ Synopsis

Several variables that affect flow spectrophotometric titrations in sequential injection analysis (SIA) systems were studied by using titration of a strong acid with a strong base as a model; blue bromothymol was used as an indicator and distilled water was used as a carrier. Both possibilities of performing titrations on SIA systems according to the aspiration sequences (a) titrant B/sample/titrant A and (b) titrant/sample are considered. In case (a) the possibilities regarding the use of different volumes and/or different concentrations of titrant reagents were studied and are discussed. The established methodology allows hydrochloric acid determinations with 0.1 M sodium hydroxide within the range 32-1000 mM by means of logarithmic calibration curves. The analysis rate is of 5 min/sample.

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