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Table 4 Determination of NPZ, PHN in their dosage form and application of standard addition technique using the proposed TLC method

From: A green TLC densitometric method for the simultaneous detection and quantification of naphazoline HCl, pheniramine maleate along with three official impurities

Naphcon-A® eye drop % found
Meana ± SD
Standard addition technique
Taken Added Recovery %
NPZ 101.36 ± 1.51 10.0 µg band−1 5.0 µg band−1 101.30
10.0 µg band−1 101.75
20.0 µg band−1 99.99
Mean ± SD 101.01 ± 0.914
PHN 100.94 ± 1.73 20.0 µg band−1 10.0 µg band−1 100.95
20.0 µg band−1 99.02
40.0 µg band−1 100.84
Mean ± SD 100.27 ± 1.084
  1. aAverage determinations of four eye drop dosage form solution