Brands % assay before degredation % assay after heating % assay after uv light   % assay after acid % assay after base % assay after time
A 175.96% 126.65% 128.10% 77.85% 171.36% 106.58%
B 76.80% 81.71% 68.23% 49.79% 77.11% 53.50%
C 159.40% 150.02% 97.64% 74.77% 107.28% 109.23%
D 68.51% 74.97% 68.41% 54.76% 72.82% 52.92%
E 128% 126.97% 129.13% 106.87% 128.72% 110.46%
Table 1: % Availability of different brands of metformin before and after degradation.