Automatic Derivative Spectrophotometric Titrations

Coulometirc Titration of +3 Iron with Electrogenerated Chlorocuprous Ion.

“…°-0591ogÍ¡cr¿) (5) or E -Ef cu+8,cuCh--0.059 log (6) At any time t (sec. ), with a constant current i (amp.…”

Our Remembrances of Howard Malmstadt

“…Later versions computed the third derivative for use with linear-segment titration curves such as those encountered with spectrophotometric titrations. 3 The titrator was later produced commercially by E. H. Sargent & Co. as the Sargent-Malmstadt Spectro/Electro Titrator. Howard Malmstadt's early work at Illinois would soon branch out from automated titrations to new areas in electrochemistry and spectroscopy.…”

Manual Differential Spectrophotometric Titrations. Application to Aqueous and Nonaqueous Acid-Base Titrations and to Chelometric Titrations.

“…Only very few photometric procedures have been proposed which involve data obtained close to the end point. Among these are the Type I plot of Higuchi, Rehm, and Barnstein (8), the titration to the equivalence point using a reference solution and differential spectrophotometry (26), and the automatic differential photometric titration apparatus developed bv Malmstadt and Roberts (19).…”