標準號：ISO 247-2006
中文標準名稱：橡膠.灰分的測定
英文標準名稱：Rubber - Determination of ash
標準類型：G40
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G40
國際標準分類號：83.060
引用標準：ISO 248;ISO 1629;ISO 1795
適用范圍：This International Standard specifies two methods for the determination of ash from raw rubbers, compounded rubbers and vulcanizates. The methods are applicable to raw, compounded or vulcanized rubbers of the M, N, O, R and U families described in ISO 1629, except that:— Method A shall not be used for the determination of ash from compounded or vulcanized rubbers containing chlorine, bromine or iodine.— Method B shall be used for compounded or vulcanized rubbers containing chlorine, bromine or iodine. It shall not be used for uncompounded rubbers.— Lithium and fluorine compounds may react with silica crucibles to form volatile compounds, giving low ash results. Platinum crucibles shall therefore be used for ashing fluorine-containing and lithium-polymerized rubbers.This International Standard does not cover the interpretation of the ash results as to the inorganic chemical content of a compound or vulcanizate. This is the responsibility of the analyst, who has to be aware of the behaviour of rubber additives at elevated temperatures.The two methods of ashing do not give identical results in all cases, and it is necessary to state in the test report the method of ashing employed.