TGA Test
Thermogravimetric analysis (TGA) reveals when mass loss occurs during heating
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Details
LOI testing quantifies the total mass lost at a chosen temperature (due to decomposition). However, thermogravimetric analysis (TGA) reveals when mass loss occurs during heating.
An ordinary pottery test kiln can also be used to fire weighed specimens to progressively higher temperatures, cooling and weighing them after each firing. By comparing successive weight losses, a technician can construct an approximate cumulative LOI profile. This is less precise than TGA, but potentially very revealing.
Related Information
TGA Analysis graph
With overlaid mass spectrometry curve
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TGA/DTA curves for Copper Hydroxide
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TGA/DTA curves showing weight loss over the temperature range.
TGA-DTA Sample curve for Copper Carbonate
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Links
| Glossary |
DTA Test
Differential thermal analysis (DTA) or differential scanning calorimetry (DSC) helps identify heat-absorbing or heat-releasing events, including some that produce no mass loss. |
| Tests |
TGA
This test plots a history of weight changes in a material as it is heated in a kiln |
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