Table 1 Performance data for the proposed methods

Concentration range (μg mL ^-1 )

2.0-25.0

0.5-8.0

Limit of detection (LOD) (μg mL ^-1 )

0.15

0.13

Limit of quantification (LOQ) (μg mL ^-1 )

0.47

0.39

Correlation coefficient (r)

0.9999

0.9999

Slope

0.0352

0.107

Intercept

-0.0116

0.0203

S _y/x

0.003

0.005

S _a

0.002

0.004

S _b

0.0001

0.0009

%RSD

1.35

1.10

% Error

0.51

0.45

ε (l/mol./cm.)

5604

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