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Table 6 Determination of NF in capsules by the proposed spectrofluorimetric method and application of standard addition technique

From: A validated spectrofluorimetric method for the determination of nifuroxazide through coumarin formation using experimental design

Antinal® capsules Drotazide®capsules
Claimed (ng ml-1) % Recoverya Pure NF added (ng ml-1) % Recoverya Claimed (ng ml-1) % Recoverya Pure NFadded (ng ml-1) % Recoverya
100 99.70 80 100.11 100 99.01 80 100.97
   100 100.80    100 98.73
   120 100.68    120 99.53
150 100.53 120 100.11 150 100.07 120 100.11
   150 100.34    150 100.80
   170 99.90    170 99.50
200 99.56 160 98.38 200 100.25 160 100.11
   180 99.72    180 100.87
   200 99.42    200 99.42
Mean 99.93   99.94   99.78   100.00
± SD 0.524   0.730   0.670   0.773
  1. a Average of three different determinations.