Sample

Average nanoiron content (wt%)

Average iron-oxide content (wt%)

Reference commercial material

87.7

12.3

nFe23-stored under ethanol for 3 weeks

88.8

11.2

nFe23-stored under water for 3 weeks

68

32

nFe 24-freshly prepared

87

13

nFe26-freshly prepared

85

15

Reference Iron-oxide powder

0

100

nFe-prepared by blasting methods

5.5

94.5