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Table 3 Agglomerate size (mean ± range), zeta potential (mean ± SD ), and endotoxin contamination of MWCNT in RPMI media

From: Effect of MWCNT size, carboxylation, and purification on in vitro and in vivo toxicity, inflammation and lung pathology

MWCNT

Hydrodynamic size

Zeta potential

E-toxin

E-toxin

 

(nm)

(mV)

(EU/mg)

(ng/50 μg)

N/S-O

568 ± 677

−10.27 ± .39

0.246

0.123

N/S-F

1845 ± 650

−9.77 ± .47

14.471

7.235

N/S-P

625 ± 131

−10.97 ± .75

0.299

0.149

W/S-O

810 ± 62

−9.73 ± 1.26

0.392

0.196

W/S-F

1161 ± 183

−9.73 ± .55

13.027

6.513

W/S-P

769 ± 52

−9.17 ± .80

11.193

5.596

N/L-O

396 ± 22

−10.6 ± .4

0.408

0.204

N/L-F

669 ± 136

−9.32 ± .16

2.629

1.31

N/L-P

441 ± 69

−10.93 ± .55

0.224

0.112

  1. N/S: narrow diameter/short length; W/S: wide diameter/short length; N/L: narrow diameter/long length.
  2. O: original MW; F: functionalized MW; P: purified MW.