Potentiometric Titrations

Abstract

review includes potentiometric titrations and related de-velopments which became available during the period from December 1963 (14S) through November 1965. Publications are grouped into six major categories on the basis of emphasis alone.General reviews of the subject include a book by Ashworth (9) on organic analysis and a report by Headridge, Pierce, and Anderson (79). Redox methods were briefly covered byStephen ( 212), and to a greater extent by Zyka (244,245). TITRATION CURVES AND THEIR INTERPRETATIONAcid-Base Titrations. A fresh approach to the mathematical treatment of mono-and diprotic weak acidstrong base titration curves was developed by Stokes (213). He formu-

Potentiometric titrations

“…This technique has been called "differential electrolytic potentiometry," "polarovoltry," "biopotentiometry," and "constant current potentiometry." The reviewer pleads, as did his predecessor (221), for one term to prevail. The first or last terms are both well suited for keyword indexing, the third term is quite analogous to the amperometric situation and the second, though apt, does not settle pleasantly in one's ear.…”

Food additive testing

“…At the time when the Polyster WOL programme began, the subcutaneous injection of the test substance was considered to be an acceptable example of a stringent test and many scientists accepted this without question, However, despite the fact that benign or malignant cancer can certainly be produced in this way when a variety of chemicals are injected, there was a growing belief that this was not a suitable test (Roe, 1966;Food Protection Committee and Others, 1967;Shubik, Saffiotti, Lijinsky, Pietra, Rappaport, Toth, Rahn, Tomatis & Feldman, 1962). This subject has been dealt with at greater length by Philp (1968).…”