Avalanche photodiode detector has ten times the sensitivity of standard kit, enabling particle size analyser to detect particles with hydrodynamic radii as small as 1.5nm
Brookhaven Instruments has recently launched a photodiode detector option for its 90Plus particle size analyser, enabling it to detect particles with hydrodynamic radii as small as 1.5nm. The BI-APD avalanche photodiode detector has more than ten times the sensitivity of the standard PMT detector using only the standard 30mW laser.
The BI-APD can be used in conjunction with Brookhaven's ZetaPlus and ZetaPals instruments to take measurements of small globular proteins, micelles, microemulsions, superfine inorganic oxides, metal particles and even hydrated salt ions.
Analysis of weakly scattering samples becomes much easier and, because a high-powered laser is not required, more economical.
Brookhaven has also launched a disposable small volume cell for those times when only a milligram or two of sample is available for light scattering studies.
The BI-SM50 cell can hold 50µl of sample and fits directly onto the top of a custom adapter in the 90Plus or BI-MAS options on the ZetaPlus and ZetaPals.
The BI-SM50 is of particular benefit where very little sample exists - samples can be used undiluted and the open-well design of the cell allows their easy removal for reconstitution.
