The ash content of anthraquinone (AQ) can be determined by the following steps:
Prepare the sample: Weigh about 1 gram of the anthraquinone sample and put it into a pre-weighed furnace boat.
Drying: Put the furnace boat into an oven preheated to 550°C, keep the hot air flux constant, and dry to constant weight. At this point, the organic matter in the sample has been thermally decomposed, leaving only the inorganic matter (ash).
Cooling: Take out the furnace boat and place it in a Drying Oven to cool down to room temperature.
Weighing: Weigh the furnace boat and the residue, subtract the weight of the furnace boat to obtain the ash content of the sample.
Calculation: Divide the ash content by the mass of the sample and multiply by 100% to get the ash percentage of the sample.
NBCHAO reminds you: the precision and accuracy of ash determination are closely related to the operation steps such as sample preparation, weighing and drying. In order to obtain accurate and reliable results, it is recommended to use calibrated precision balances and ovens, strictly control the experimental conditions and operating procedures, and avoid the influence of impurities in the air on the results.