Abstract: The problems in the detection of carbon black content of ash-containing PE materials were analyzed by thermogravimetry from the view point of standardization and production technology. It should be pointed out that the current detection method of carbon black content was unreasonable due to the unreasonable setting of calcination conditions as well as the difference in the ash content of PE materials existed before and after calcination. Such a difference leads to the shortage of deviation in the test results of carbon black content. A new method was proposed to adjust the calcination conditions and reduce the calcination temperature and the quality change of ash before and after calcination， and eliminate the significant influence of the existence of ash on the test results of carbon black content of PE materials. These can meet the practical requirement for the detection of the carbon black content of ash-containing PE materials.

Key words: ash, carbon black, polyethylene