Residue On Ignition Test

Residue On Ignition Test: Organic drugs charred by incineration, then add sulfuric acid wet, low temperature heating to sulfuric acid vapor removal, at high temperature (700 ~ 800℃) incineration to complete ash, so that the destruction of organic material decomposition into volatile substances escape, non-volatile inorganic impurities (mostly metal oxides or salts) become sulfate, known as incineration residue. The residue on ignition check method is used as an indicator to control the quality of API. Among them, volatile inorganic drugs such as hydrochloric acid, ammonium chloride, by heat volatilization or decomposition, residual non-volatile impurities, so also according to the above method to check the burning residue.