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Particle data interpretation

Understanding Microtrac Particle-Size Data

A particle-size report may contain percentiles, several means and distributions with different weighting. The labels matter: a median, a volume-weighted mean and an intensity-weighted result do not describe the same statistic.

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Can D50 be used as another name for average particle size?

It is a median on the stated distribution basis, not a universal average. Compare like definitions and examine the rest of the distribution where coarse or fine fractions matter.

Read the distribution basis and size definition before comparing numbers. A volume-based D50 identifies the point below which half the reported volume lies; it is not necessarily the arithmetic mean or a number-based median. Keep the software output definition with the result, including whether data describe percent smaller or percent larger.

Planning particle data interpretation

Keep a particle statistic connected to its distribution and definition. A mean, median or percentile can emphasize different aspects of the same data. Decide which output supports the actual quality decision, then compare the same definition between samples instead of treating every reported size as interchangeable.

What to bring to an application discussion

Understanding Microtrac Particle-Size Data: measurement checklist
ConsiderationInformation to provide
Output definitionPercentile, mean or distribution
Weighting basisNumber, volume or intensity
Reporting directionSmaller than or larger than

Questions before selecting a configuration

How can Glen Mills help with this application?

Share output definition, weighting basis, reporting direction when you contact Glen Mills for further information or a quote. This helps focus the discussion on the preparation and evaluation described here.

How should a measurement result be assessed?

Use the size definition, distribution basis and acceptance criteria required by your measurement method. Discuss particle measurement with Glen Mills when a representative trial is needed to evaluate the configuration.

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