Accurate molecular weight analysis

Testa Analytical introduces the LS Assistant, a new accessory for Multiangle Light Scattering (MALS) instruments that delivers accurate and reliable specific refractive index (dn/dc) measurements - a critical factor for precise molecular weight determination of macromolecules.

Designed for ease of use, the LS Assistant features an intuitive interface requiring minimal training. Its design ensures 100% sample recovery, allowing valuable samples to be reused for further testing.

Compatible with nearly any solvent, the system includes precise temperature control to maintain stable measurement conditions across a broad range of applications. Whether analysing polymers, proteins, or nanoparticles, the LS Assistant enhances macromolecular characterisation and integrates seamlessly with goniometers, light scattering instruments, and GPC systems.

The LS Assistant supports both concentration and dn/dc value measurements. Its integrated software enables rapid, accurate determination of dn/dc values from dissolved samples within minutes. Once the dn/dc value is established, the LS Assistant accurately measures sample concentration.

Available in multiple models tailored to match the operating wavelength of your light scattering instrument, the LS Assistant’s wavelength matching capability marks a significant improvement in molecular weight determination accuracy using dn/dc values.