Recycling Polymer Materials in Design, Construction and Trial Application of Positive Pressure Laboratory Dispenser

Abstract

A positive pressure pneumatic device sourced mostly from used plastics
and glass was constructed for use as dispenser in the laboratory. Here
reagents for routine laboratory use were tested in the equipment to
determine its applicability. Systematic studies were carried out on the
comparative stability of analytical reagents in conventional titrimetric
method on one hand and pneumatic dispenser on the other hand using
both oxidation/reduction and acid/base reactions as the basis of the
study. The titre values of 12.00, 12.00, 12.00 and 12.00 cm3 were
recorded respectively in conventional titration, while 12.00, 12.00,
12.00, and 12.00 cm3
titres were recorded respectively using stabilized
oxidation/reduction titration. In the case of (HCl/K2CO3 couple)
reaction, the following titre values were recorded for conventional
titrimetric method; 20.00, 20.00, 20.00, 20.00 and 20.00 cm3 while the
equivalent value for the pneumatic dispenser were; 20.00, 20.00, 20.00,
20.01, and 20.00 cm3
. Results showed no difference between the two
trials made using the two methods of analysis. Therefore, the
equipment is suitable for the intended purpose.