Chemistry: physical processes – Physical processes – Crystallization
Patent
1980-01-21
1981-05-12
Serwin, Ronald
Chemistry: physical processes
Physical processes
Crystallization
204 1T, 364497, 422 76, 422 77, G01N 3116, G01N 2744
Patent
active
042669421
ABSTRACT:
A method for the automatic, electro-chemical determination of the end point of titration utilizing an initial, continuous addition of the titrant, up to a predetermined value, followed by a step-by-step addition with a resting time inserted therebetween for stabilization of the solution is disclosed. As the titrant is being added to the bath sample in constant volume units, a measured value is formed after every such addition. The difference to the preceding measurement is determined and the three consecutive differences of greatest magnitude are utilized in a mathematical formula for calculating the end point. The titration ceases when the greatest difference lies between two lesser values.
REFERENCES:
patent: 3157471 (1964-11-01), Harrison
patent: 3195982 (1965-07-01), Nicholson
patent: 3246952 (1966-04-01), Dawe
patent: 3769178 (1973-10-01), Rothermel, Jr.
patent: 4058365 (1977-11-01), Krogh
patent: 4180440 (1979-12-01), Gibboney et al.
Ebel, "Evaluation of Automated Potentiometric Titrations", Chemie-Ingenieur-Technik, vol. 46, 1974, No. 19, pp. 811-817.
Vandenbossche Chris
Vanhumbeeck Jacky
Serwin Ronald
Siemens Aktiengesellschaft
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