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QAS Catalogue

What are Malvern Quality Audit Standards?

Malvern's Quality Audit Standards have been produced to provide users of Malvern particle size analysers with a reliable one-shot polydisperse transfer standard to enable them to check the performance of their particle sizers and sample dispersion units for the whole working life of their systems.

Each Quality Audit Standard is supplied as a pack of 10 one-shot bottles of 15 to 150 µm glass beads of the right weight for the individual sample dispersion units to be tested and each pack includes data sheets giving pass/fail criteria, detailed measurement protocols and MSDS.

The relative standard deviation on the Dv50 obtained from a series of bottle-to-bottle comparisons carried out on a single sizer system has been established as 0.22%. This is within the repeatability that can be expected from repeat measurements of a single well-dispersed sample recirculating within the measurement system.

Drawn from a master batch of 1000kg, the following standards are expected to be available for the next fifteen years*


Part Number.
 Weight
 Used on
Replaces
QAS3001B
 0.4g

MS1, DIF2021, Hydro 2000S and Hydro 2000SM.

QAS2001 and QAS3001
QAS3002

 2.5g

Wet sample dispersion units:
DIF2012, Hydro 2000G, Hydro 2000M/MU and Autosampler 2000 with the Hydro G (uses 2 bottles).

Dry powder feeders:
MAM2460/2461, Scirocco 2000, EDA2000 and EDA2001.

 

 QAS2002 and QAS2003
QAS3004

 100mg

Hydro µP

 QAS2005
 


  *at current usage rates
 
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