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Table 1 Physicochemical characteristics of the MWCNT library

From: The pulmonary toxicity of carboxylated or aminated multi-walled carbon nanotubes in mice is determined by the prior purification method

MWCNT

sample

ICP-MSa

residues

(%)

Raman spectroscopy

EDXb

XPSc

Kaiser test

BETd

Pore volume

Al

TEe

ID1/IG

ACf

C (%)

O(%)

N(%)

C(%)

O(%)

N(%)

(μmol/g)

(m2/g)

(μl/g)

NC7000

4.43

0.54

1.29

4.68

92.05

3.19

0

97.8

1.4

0

24

61

TP7000

0.04

0.16

0.47

0.48

98.89

1.06

0

99.4

0.6

0

30

83

TP-COOH

0.41

0.81

98.59

1.22

0

95.1

4.4

0.5

141

381

TP-NH2

0.39

1.92

90.97

5.99

3.02

86.3

7.3

6.4

47

182

402

CP7000

0.13

0.15

1.28

4.07

98.88

0.98

0

98.1

1.9

0

30

111

CP-COOH

1.16

5.00

95.47

4.33

0

94.1

5.9

0

179

521

CP-NH2

1.28

4.53

97.62

1.17

0.78

98.6

0.7

0.5

62

111

330

  1. aTE, transition elements (Co and Fe)
  2. bEDX, energy dispersive X-ray analysis
  3. cXPS, X-ray photoelectron spectroscopy
  4. dBET, Brunauer, Emmett and Teller analysis
  5. eTE, transition elements (Co and Fe)
  6. fAC amorphous carbon content estimated from the area of the D3 band expressed as area percent from the total deconvoluted Raman spectra (see Additional File 3)