Table 1 System suitability parameters of the proposed RP-HPLC and TLC methods

Retention time (t_R) / Retardation factor

1.60

2.19

2.52

3.25

7.38

0.12

0.30

0.42

0.54

–

Tailing factor (T)

1.05

1.00

0.88

0 .95

1.09

1.18

1.00

0.79

1.00

T = 1 for a symmetric peak

T = 1 for a symmetric peak

Capacity factor (K`)

1.30

2.12

2.60

3.63

9.55

7.33

2.33

1.38

0.85

1–10

The higher the capacity factor, the smaller the Rf

Resolution factor (R_s)

10.37

3.85

2.21

3.20

1.23

1.00

1.02

R_s > 2

Rs > 1

Selectivity factor (α)

2.63

1.63

1.23

1.40

3.15

1.69

1.62

α > 1

α > 1

Number of theoretical plates (N)

1840

3401

4508

1863

3492

Increase with the efficiency of the separation

HETP

0.136

0.074

0.055

0.134

0.072

The smaller the value, the higher the column efficiency