Development of a Commercial Automatic Colorimetric Titrator

Abstract

An automatic titrator is described, which can be used for many routine colorimetric determinations. The titration is monitored by a light beam passing through the titration beaker; at the end point the change in transmittance causes a meter relay to close, which in turn stops delivery of reagent. Titrations are most conveniently carried out using a motor-driven syringe to deliver the titrant, although both solenoid burets and coulometric generation can be used. Results on most titrations have standard deviations of 3 parts per thousand or better for delivery of 3.5 ml. of titrant. © 1959, American Chemical Society. All rights reserved.