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Table 2 Colloidal characterization of ENM used in this study

From: An integrated methodology for assessing the impact of food matrix and gastrointestinal effects on the biokinetics and cellular toxicity of ingested engineered nanomaterials

Sample d H
(nm)
D 32
(nm)
PdI ζ
(mV)
σ
(mS/cm)
pH
Fe2O3 in water 108.3 ± 1.1 0.199 ± 0.007 −27.2 ± 0.4 0.03 ± 0.00 6.05
Emulsion 191.7 ± 2.2 138 ± 1 0.190 ± 0.019 −33.6 ± 1.3 0.81 ± 0.00 6.97
Emulsion + Fe2O3 200.7 ± 4.1 132 ± 3 0.243 ± 0.007 −36.3 ± 0.6 0.80 ± 0.01 6.94
Mouth digesta 365.4 ± 20.3 295 ± 9 0.489 ± 0.096 −23.0 ± 0.8 1.04 ± 0.03 6.66
Mouth digesta + Fe2O3 472.3 ± 4.3 270 ± 8 0.768 ± 0.008 −23.7 ± 1.1 1.03 ± 0.3 6.76
Stomach digesta 272.4 ± 5.9 29,967 ± 1254 0.354 ± 0.052 0.7 ± 0.5 1.49 ± 0.07 1.64
Stomach digesta + Fe2O3 332.2 ± 17.3 25,490 ± 550 0.541 ± 0.073 1.4 ± 0.2 1.40 ± 0.14 1.52
Sm. Int digesta 227.5 ± 1.7 1175 ± 182 0.322 ± 0.030 −55.2 ± 3.7 1.05 ± 0.03 7.02
Sm. Int digesta + Fe2O3 335.5 ± 0.7 491 ± 52 0.513 ± 0.015 −47.6 ± 1.7 1.08 ± 0.04 6.98
Sm. Int. digesta 1:3 D + F 1736.7 ± 160.9 405 ± 40 0.390 ± 0.130 −16.5 ± 1.1 2.23 ± 0.10 7.13
Sm. Int. digesta + Fe2O3, 1:3 D + F 1867.7 ± 144.3 336 ± 62 0.373 ± 0.023 −16.3 ± 1.6 2.29 ± 0.15 7.03
Sm. Int digesta 1:3 D-F 242.4 ± 1.7 347 ± 8 0.322 ± 0.040 −27.2 ± 1.4 2.17 ± 0.10 7.07
Sm. Int digesta + Fe2O3,1:3 D-F 394.2 ± 2.5 307 ± 52 0.536 ± 0.012 −24.9 ± 3.2 2.35 ± 0.14 7.10
  1. d H intensity-weighted mean hydrodynamic diameter by DLS, D 32 surface-weighted mean diameter by laser diffraction, PdI polydispersity index, ζ zeta potential, σ specific conductance