Compositional Analysis by Thermogravimetric Analysis (TGA)
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ASTM E1131, ISO 11358
A2LA Accredited
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Scope:
In a Thermogravimetric Analysis, the percent weight loss of a test sample is recorded while the sample is being heated at a uniform rate in an appropriate environment. The loss in weight over specific temperature ranges provides an indication of the composition of the sample, including volatiles and inert filler, as well as indications of thermal stability
Test Procedure:
Set the inert (usually N2) and oxidative (O2) gas flow rates to provide the appropriate environments for the test. Place the test material in the specimen holder and raise the furnace. Set the initial weight reading to 100%, then initiate the heating program. The gas environment is preselected for either a thermal decomposition (inert - nitrogen gas), an oxidative decomposition (air or oxygen), or a thermal-oxidative combination.
Specimen size:
10 to 15 milligrams
Data:
A plot of percent weight loss versus temperature.
Equipment Used:
Perkin Elmer TGA7 Thermogravimetric Analyzer
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