method 2D method 2DD method
Pharmaceutical
Dosage Form
Dosage Form Standard addition Dosage Form Standard addition
Found %*±RSD% Pure added (μg/ ml) Found (μg/ ml) R% Found %*±RSD% Pure added (μg/ ml) Found (μg/ ml) R%
Antinal Capsules
(batch no.2488)
101.22±1.261 4 4.05 101.25 101.69±1.877 4 4.03 102.75
6 5.99 99.83 6 6.03 100.50
8 7.86 98.25 8 8.10 101.25
Mean±RSD   99.77±1.504   101.50±1.145

* Average of three determinations.
Table 6: (Determination of Nifuroxazide in Antinal® capsules by the proposed 2D, 2DD methods and application of standard addition techniques).