Table 1. Size distribution of raw and agglomerated WPI-fortified SMP particles with different SMP/WPI ratios

Sample D[3,2] (μm) Dv10 (μm) Dv50 (μm) Dv90 (μm) Span
Raw powder WPI 61.6±0.59a 29.2±0.35a 108.8±1.53a 218±2.52a 1.73±0.01a
SMP 63.0±0.47a 33.5±0.15b 87.7±0.60b 211±4.62ab 2.02±0.04b
SMP9/WPI1 62.4±0.21a 33.1±0.15bc 90.8±0.35b 203±1.73ab 1.87±0.02c
SMP8/WPI2 62.7±0.49a 32.5±0.20bc 95.6±0.93c 210±2.00ab 1.86±0.01c
SMP7/WPI3 61.9±0.58a 31.7±0.32c 97.1±1.06c 210±2.08ab 1.84±0.01c
Agglomerated powder SMP 130.7±2.31b 73.6±1.21d 169.3±3.06d 345±7.55c 1.61±0.02d
SMP9/WPI1 115.7±1.53c 66.3±0.91e 159.7±2.31e 322±6.35d 1.60±0.01d
SMP8/WPI2 103.3±0.58d 59.3±0.21f 151.3±1.53f 306±2.52e 1.63±0.01d
SMP7/WPI3 90.7±1.59e 52.7±0.76g 136.7±1.15g 269±2.00f 1.58±0.01d
Values are the means of three measurements±SD.
Mean values in the same line with different letters are significantly different (p<0.05).
The SMP (skim milk powder) was mixed with WPI (whey protein isolate) at different ratios of 9:1 (SMP9/WPI1), 8:2 (SMP8/WPI2), and 7:3 (SMP7/WPI3).