20150100249 | Method for Deciding Whether a Sample is Consistent with an Established Production Norm for Heterogeneous Products - A method of analysis of a heterogeneous product, for example heparin or heparin derivatives, to define whether said heterogeneous product is consistent with a library of verified heterogeneous samples (Library 1) by analysing the variation, natural or alien. The acceptable variation of the heterogeneous product is determined by comparing Library 1 with a second set of verified spectra (Library 2), by use of comparative two-dimensional correlation spectroscopic filtering (comparative 2D-COS-f). The method comprises obtaining a one-dimensional complex spectrum, for example | 04-09-2015 |