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Table 3 Comparison of three columns under optimized conditions

From: Development and validation of a chromatographic method for determining Clematichinenoside AR and related impurities

Columns

Compounds

Rs

As

α

k’

NTP

Thermo ODS Hypersil

Imp-1

-

1.681

-

0.279

8610

(4.6mm ×150mm, 5 μm)

Imp −2

3.62

1.281

1.234

0.579

3280

AR

9.49

0.879

2.583

2.178

3162

Imp-3

1.60

1.036

1.119

2.559

3255

Imp-4

1.63

0.934

1.116

2.979

3615

Imp-5

40.03

2.778

3.215

10.974

127412

Diamonsil C18(4.6mm ×150mm, 5 μm)

Imp-1

-

0.707

-

0.237

5722

Imp-2

3.37

1.135

1.283

0.586

2009

AR

9.41

0.878

3.051

2.786

2167

Imp-3

1.52

0.977

1.135

3.297

2448

Imp-4

1.90

0.951

1.157

3.977

2948

Imp-5

27.88

0.691

2.341

10.740

159346

Agilent TC-C18(4.6mm×150mm,5 μm)

Imp-1

-

1.124

-

0.693

4009

Imp-2

6.79

1.047

1.872

1.630

3889

AR

18.33

0.838

2.856

5.547

10299

Imp-3

1.99

0.964

1.080

6.032

14992

Imp-4

2.06

0.974

1.070

6.492

19418

 

Imp-5

26.91

1.012

1.686

11.335

248207

  1. Rs, resolution; As, tailing factor; α, selectivity; k’, capacity factor; NTP, number of theoretical plates.