The influence of temperature on ignition loss of shallow sea bottom sediments
1993
Sato, Y. (Japan Sea National Fisheries Research Inst., Niigata (Japan)) | Nagasawa, T.
The difference in ignition loss of the sea bottom sediments at 550 degrees C for 6 hours and 900 degrees C for 1 hour was precisely revealed. It has been explained by the decomposition of carbonate. The carbon content in the sample ignited at 550 degrees C for 6 hours was analysed by the CHN-Analyzer. The amount of carbonate calculated from the carbon value was lower than the difference; therefore, this difference was not explained by the decomposition of carbonate only. We assumed that the sample ignited at 550 degrees C for 6 hours contained H2O because it was shown to contain hydrogen by CHN-Analyzer. If the remaining H2O was removed at 900 degrees C, then the difference in ignition loss of the two conditions was explained well. Consequently, we concluded that the ignited samples contained water of crystallization, and the difference in ignition loss at low and high temperatures is caused by the decomposition of carbonate and discharge of water of crystallization
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