Discussion on the melting phenomenon, the effect of impurities, and a short derivation of Van’t Hoff’s relation
.3 Impurity effects Impurity effects are usually the most significant source of uncertainty in fixed-point realisations. Recent improvements in the accuracy and limits of detection in the chemical analysis of impurities in fixed-point substances have made it feasible to model and correct for some impurities. This has had a considerable impact on both the realization […]