An apparatus for automatic measurement of absorbancy

Study on automatic chemical analysis of steel. I

Abstract

An automatic apparatus has been developed for measuring the absorbancies of colored sample solutions in measuring flasks. The apparatus consists of a sample solution changer with twelve suction tubes, aspectrophotometer with flow-through cuvette and an aspirator. The changer is mainly made up of twelve electromagnetic cocks, each of which is fitted with one of the twelve tubes dipped in the colored sample solutions. It is automatically controlled to open the cocks in order, sucking the sample solutions through the flow-through cuvette for absorbancy measurement. The cock is newly applied and works on the basis of pressing a tube between the plunger and the metal rod for closing the flow-pass of the tube.
The time required for measuring absorbancies of twelve sample solutions was about 6 min. The analytical results showed a good accuracy and reproducibility.