Assertion: high temperature furnace | /r/HasProperty | figure
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Source sentences:
text: However, if the starting material contains organic matter of unidentified composition or has a large amount of impurities, it is advised to pre-carbonize the sample in a low temperature hot wall furnace of the GLO range up to 1100 °C to purify the sample under inert gas atmosphere until it is suitable to be heat treated in a more sensitive high temperature graphite furnace (Figure 6 and 7).