From:  Quality control assessment of bisoprolol fumarate scored tablet products available in Saudi Arabia

 % Recoveries of BF.

% of surplus drug addedTheoretical concentration (ppm)Measured concentration (mean ± SD) (ppm)% RecoveryRSD (%)
08.929.59 ± 0.03107.50%0.27
5013.3814.03 ± 0.01104.90%0.08
10017.8419.59 ± 0.04109.80%0.24
15022.322.94 ± 0.04102.88%0.17

BF: bisoprolol fumarate; RSD: relative standard deviation.