Parameters

Derivative spectrophotometric methods

HPLC method

RPG

MTF

RPG

MTF

Linearity range^a (µg/mL)

5.0 - 50.0

5.0 - 50.0

5.0 - 50.0

5.0 - 50.0

Intra-day^b, RSD%

0.92

0.85

0.76

0.61

Inter-day^c, RSD%

1.76

1.18

1.91

1.19

Regression equation^d

A = 0.0111C + 0.0177

A = 0.0045C + 0.0116

A = 12,687.68C + 2930.32

A = 34,449.77C + 12,527.40

Correlation coefficient, r

0.9950

0.9999

0.9999

1.0000

LOD (µg/mL)

0.170

0.347

0.601

0.545

LOQ (µg/mL)

0.568

1.156

1.821

1.653