Light scattering experiments are set to become easier with the launch of the BI-DNDC Differential Refractometer by Brookhaven Instruments. The new differential refractometer has a warm-up time of just one hour and is significantly less expensive than other models on the market.
An accessory to the existing line of Brookhaven’s light scattering instruments, the BI-DNDC is a deflection type refractometer that provides key information for continuing research and/or monitoring activities. The instrument comes with sophisticated Windows™ based software that can calculate the specific refractive index increment (dn/dc) in either static or dynamic mode. An accurate value of dn/dc is essential in molecular weight determination by light scattering. In dynamic mode the BI-DNDC can also be used as a concentration detector for HPLC and GPC applications.
Easily programmable and user-friendly, the BI-DNDC can be controlled and read using the LED readout or by an external computer. Refractive index and temperature data can be transferred to a PC via a standard serial interface. Included with the instrument is a syringe kit with tubing, fittings and syringes. Other features include nine measurement ranges, active temperature control up to 80 °C, autozero, reference cell flush and sensitivity of 2.5 x 10-9 RIU – equivalent to 1.5 ng fructose per mL H2O.