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Table 1 Determination of Fe2+.and Fe3+ in water samples

From: Terminalia chebula: a novel natural product colorimetric sensor for Fe2+ and Fe3+ ions

Metal ion

Added (M)

Recovered (M)

Recovery (%)

R.S.D (n = 3) (%)

Fe2+

0

0

  
 

1.50 × 10–4

1.48 × 10–4

98.66

1.71

 

3.0 × 10–4

2.97 × 10–4

99

1.69

Fe3+

0

0

  
 

1.50 × 10–4

1.47 × 10–4

98

1.84

 

3.0 × 10–4

2.95 × 10–4

98.33

1.81