Berechnung des Endpunktes potentiometrischer Titrationen mit programmierbaren Tischrechnern

Polarographic analysis of 2-ethylanthraquinone and its tetrahydro derivative. Part II. Differential pulse polarography

“…4 Recently, the application of direct current polarography to the analysis of mixtures of these two quinones has been reported. 5 The present work is concerned with application of differential-pulse polarography (DPP) to the analysis of mixtures of 2EAQ and H4EAQ. Previous work by Princeton Applied Research Corporation (PAR) in the form of an application brief recommended the use of a solvent system of 1 : 1 ethanolwater and a supporting electrolyte of 0.1 M lithium chloride.…”

“…This supporting electrolyte has been recommended previously for the d.c. polarography of these quinones . 5 Experimental Chemicals 2EAQ and H4EAQ samples were donated by Laporte Industries Limited, General Chemicals Division, Widnes, Lancashire. The peak melting-points given by a Perkin-Elmer differential scanning calorimeter (Number 1B) were 108 and 168 "C for EAQ and H4EAQ, respectively.…”

Ion selective electrodes, potentiometry, and potentiometric titrations

“…Three papers by Anfelt and Jagner report digital computer applications to end-point determinations (34,416) and semiautomatic titrator data processing (35). Four papers by Ebel describe the evaluation of titration data by digital computer using the Gran principle (283)(284)(285)(286). Continuous monitoring using a computerized Gran plot method was reported by Fleet and Ho (321).…”