Pharmaceutical drug

[Fe(II)] Takenmol∙L⁻¹

Fe(II), % Found

Recovery %

SD, (RSD (%))

Calibration

AAS

calibration

AAS

calibration

ASS

Usinf Electrode (I):

Ferro sanol duodenal Ferrofol Folicron

1 × 10⁻³

0.988 × 10⁻³

0.997 × 10⁻³

0.987 × 10⁻³

0.979 × 10⁻³

0.989 × 10⁻³

0.999 × 10⁻³

98.80 99.70 98.70

97.90 98.90 99.90

2 × 10⁻⁵, (2.08)

1.9 × 10⁻⁵, (2.03)

2.1 × 10⁻⁵, (2.17)

2.3 × 10⁻⁵, (2.35)

2.2 × 10⁻⁵, (2.28)

2.3 × 10⁻⁵, (2.36)

Usinf electrode (II):

Ferro sanol duodenal Ferrofol Folicron

1 × 10⁻³

0.989 × 10⁻³

0.985 × 10⁻³

0.996 × 10⁻³

0.979 × 10⁻³

0.987 × 10⁻³

0.989 × 10⁻³

98.90 98.50 99.60

97.90 98.70 98.90

1.9 × 10⁻⁵, (2.01)

2.4 × 10⁻⁵, (2.5)

2.02 × 10⁻⁵, (2.08)

2.2 × 10⁻⁵, (2.4)

2.5 × 10⁻⁵, (2.6)

3.2 × 10⁻⁵, (3.37)