International Journal of Analytical Chemistry / 2012 / Article / Tab 2

Research Article

Preliminary Assessment of the Chemical Stability of Dried Extracts from Guazuma ulmifolia Lam. (Sterculiaceae)

Table 2

Thermogravimetry parameters of the crude extract (CE) and the crude extract + colloidal silicon dioxide (CEA) of Guazuma ulmifolia.

SampleMass loss (%)Days of storage
2 7 14 21

CE1 3.68 4.44 4.51 4.85 4.90
2 9.70 8.44 8.98 8.38 8.27
3 32.46 33.06 32.29 31.79 30.75

Total mass loss (%) 45.87 46.22 46.81 45.45 44.85

CEA1 2.31 3.54 3.11 2.07 2.36
2 4.80 4.15 5.13 4.85 4.97
3 19.79 19.39 20.89 18.98 19.21

Total mass loss (%) 27.33 27.60 29.47 26.03 26.93

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