App Notes

Natural heparin is a polysaccharide and consists of molecular chains of varying lengths. Low molecular weight heparin (LMWH) consists of short chains and is used as anticoagulant in diseases that feature thrombosis and for prophylaxis against it.

Polysulfone allows easy manufacturing of membranes, with reproducible properties and controllable pore sizes. These membranes are used for applications like haemodialysis, but also for waste water recovery or food and beverage processing.

Gradient HPLC can be hyphenated with GPC/SEC in a fully automated setup to measure molar mass and chemical composition distribution of copolymers simultaneously with highest peak capacity.

Helium is well known as Helium that makes balloons and airships float and in its liquid form, Helium is used in a variety of applications including cooling for magnets in Magnetic Resonance Imaging (MRI) scanners, cooling infrared detectors, and as a superconductor coolant in the large hadron collider at CERN.

This application note present a simple yet rugged analytical procedure for direct analysis of 2- and 4-MI using hydrophilic interaction liquid chromatography (HILIC) and UV detection.

Nuts are considered nutrient dense foods and their consumption has been associated with reduced risk of coronary heart disease. The health benefits of nuts are partially attributable to their high content of unsaturated fatty acids.

Infrared spectroscopy can be used as an analytical measurement technique to identify the molecular constituents (chemical groups) of an extremely wide range of solid, liquid and gaseous sample types.

Laboratories that switch gas supply from helium to hydrogen can see a number of benefits including reduced overheads, faster throughput and even improved separations.

Hydrogen has long been considered as the best carrier gas for gas chromatography. In many cases hydrogen has become the carrier gas of choice since it results in fast analysis, high efficiency, reduced costs, and prolonged column life.

Here we show the reasons behind the helium shortage, what hydrogen offers the chromatographer and show how hydrogen can improve the separation of analytes in a complex mixture of compounds whilst improving the throughput of sample.