Trimodal mass-size distribution

The mode of distribution is simply the value of the most frequent size present. A distribution exhibiting a single maximum is referred to as a unimodal distribution. When two or more maxima are present, the distribution is caUed bimodal, trimodal, and so on. The mode representing a particle population may have different values depending on whether the measurement is carried out on the basis of particle length, surface area, mass, or volume, or whether the data are represented ia terms of the diameter or log (diameter). 

Figure 5. Trimodal distribution of a suspension containing 0.261, 1.09 and 2.99 pm latex spheres measured by PCS. For each nominal size, the input and measured mass fractions were as follows For 0.261 pm, input = 0.07, measured = 0.24 for 1.09 pm, input = 0.74, measured = 0.03 for 2.99 pm, input = 0.19, measured = 0.73.

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