IMPORTANT MESSAGE
Like many other companies and institutions around the world, we are experiencing interference with some of our systems within the TNT network.
We are implementing remediation steps as quickly as possible. We have implemented operational contingencies to continue to complete collections from customers with scheduled stops. For customers who do not have a regular stop, collection should be arranged via our customer service centers.
Customers may experience delays in the transit of shipments, particularly inter-continental or non-EU European delivery, as we work to remediate our systems. Additionally, if customers do not have the facility for self-labeling, they may also experience delays.
We are not able to collect shipments of dangerous goods at this time.
We regret any inconvenience to our customers.
The Effect of Crystal Orientation on Raman Spectra
The Effect of Crystal Orientation on Raman Spectra
Over recent years, Raman spectroscopy has proved to be a very effective tool for polymorph screening, especially when combined with multivariate analytical programs such as principal component analysis PCA. PCA is designed to highlight hidden trends within a data set by describing the variance present through factor loadings. However, in screening experiments it is important to distinguish between spectral differences due to polymorphism and those from other sources.
Here we show data highlighting the large spectral differences that can arise between the Raman spectra collected with different orientation of the excitation beam and crystallographic axes.
