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Titrimetric analysis with catalytic end-point detection and a spotting technique

✍ Scribed by Herbert Weisz; Joachim Schlipf

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
519 KB
Volume
147
Category
Article
ISSN
0003-2670

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✦ Synopsis

In the determinations described, the catalyst is usually titrated with the inhibitor. A semi-automatic spotting method is used for end-point detection. Dilute solutions of metal ions (Cu, Fe, Co, Ni, Zn, Al, Fe + Ni, Fe + Al), usually in the range 3-70 pg ml-', are titrated with EDTA solutions. Mixtures of iodide (3-25 mg) and chloride (2-15 mg) are titrated sequentially with 1 M silver nitrate solution to different catalytic end-points. A minute proportion of the solution being titrated is transferred continuously to a mixing chamber where it reacts with suitable indicator solutions and drops onto a moving band, on which the end-point can be recognized by a colour change in successive drops. Calibration graphs are essential.

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