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Table 2 Regression and validation data for quantitative analysis of ASP and OMZ by the proposed methods

From: Application of different quantitative analytical techniques for estimation of aspirin and omeprazole in pharmaceutical preparation

Parameters

1DD

TLC densitometry

ASP

OMZ

ASP

OMZ

Wavelength (nm)

237

295

272

272

Linearity range

20–140 µg/mL

4–20 µg/mL

10–50 ng/band

10–50 ng/band

Slope

0.0591

0.2693

478.27

974.66

Intercept

0.0392

0.0780

386.52

133.29

Coefficient of determination (r2)

0.9997

0.9999

0.9996

0.9999

LOD

6.183 µg/mL

1.129 µg/mL

3.026 ng/band

2.838 ng/band

LOQ

18.736 µg/mL

3.422 µg/mL

9.169 ng/band

8.597 ng/band

Accuracy (%R)a

98.72

100.24

100.38

98.75

Repeatability precision (RSD)b

0.621

0.521

0.732

0.528

Intermediate precision (RSD)b

0.425

0.670

0.798

0.882

  1. aAverage of 9 determinations (3 concentrations repeated 3 times)
  2. bRSD of 9 determinations (3 concentrations repeated 3 times)