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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