Study of the Freezing Temperature of Glutaric Acid as a New Reference Material in Thermometry

Abstract

The purification of Glutaric acid was carried out by zone melting
technique. A study of freezing behavior of Glutaric acid 99.965 % has been
carried out by using Copper/Copper-Nickel thermocouple (type-T) which was
calibrated by comparison against standard platinum resistance thermometer
(SPRT) at the national institute of measurement (IMGC-Italy). The average
value of the freezing point is found to be 97.18±0.28oC. A laboratory technique
for purification of Glutaric acid to be used as a reference material for
thermometric work is also described. In this paper the results for the realization
of Glutaric acid after and before purification are reported.