Sensitivity of particle measurement system increased
Sensitivity of particle measurement system increased
Keywords: Sensitivity, Evaluation, Particles, Measurment
Brookhaven Instruments has recently launched a photodiode detector option for its 90Plus particle size analyser, reportedly enabling it to detect particles with hydrodynamic radii as small as 1.5 nm. The BI-APD avalanche photodiode detector claims more than ten times the sensitivity of the standard PMT detector using only the standard 30 mW 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 wildly scattering samples is believed to become 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 50 pi 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 thought to be 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.
Futher details are available from (USA) Brookhaven Instruments Corporation. Tel: +1 631 758 3200; Fax: +1 631 758 3255; E-mail: info@bic.com; Web site: www.bic.com (UK) Brookhaven Instruments Limited. Tel:+ 44 (0) 1386 792727; Fax: + 44 (0) 1386 792720; E-mail: info@brookhaven.co.uk; Web site: www.brookhaven.co.uk
