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Table 2 Regression equation parameters

From: Stability-indicating method development and validation for the concurrent determination of darunavir, cobicistat, emtricitabine and tenofovir alafenamide by UPLC in bulk and tablet dosage forms

Parameter

TAF

COBI

FTC

DRV

Linearity range (μg/mL)

1.25–7.5

18.75–112.5

25–150

100–600

Slope

21,358

4922

5361

5101

Y-intercept

1291

4588

6194

9556

Correlation co-efficient

0.9993

0.9996

0.9998

0.9998

Regression equation

y = 21405x + 1118.4

y = 4936.9x + 3777.5

y = 5362.2x + 4786.9

y = 5108.7x + 5717.5

  1. TAF tenofovir alafenamide, COBI cobicistat, FTC emtricitabine, DRV darunavir, μg/mL microgram/millilitre