Green Chemistry: A Simple Manual Apparatus for Potentiometric and Conductometric Micro-Titration of Small Samples for the Educational Laboratory

A simple manual micro-titration method is proposed for the potentiometric and conductometric titration of 200 to 800 µL liquid samples. The sample be titrated dispensed into chamber; bottom section a plastic test tube that glued center small stirring magnet. After inserting sensing probe tip titrant delivery chamber, chamber-stirring magnet assembly spun at low speed using conventional magnetic stirrer. Titrant delivered (with 0.2 resolution) from submerged 100-µL capacity micro-pipette by rotating plunger with locking ring unlocked. apparatus has been used acids bases usually encountered in educational laboratories. Compared macro-scale titrations, obtained accuracy was between +2.2% -3.9% relative error precision ranged 1.6% 2.9% standard deviation. procedure cuts reagent consumption 1% or less compared titrations.