標準號：ISO 2828-1973
中文標準名稱：主要用于鋁生產的氧化鋁 氟含量的測定 茜素配位酮和氯化鑭分光光度法
英文標準名稱：Aluminium oxide primarily used for the production of aluminium; Determination of fluorine content; Alizarin complexone and lanthanum chloride spectrophotometric method
標準類型：G10
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：G10
國際標準分類號：71.100.10
適用范圍：Applicable to products having F contents of more than 0.003 % (m/m). Dissolution of a test portion by attack by sulphuric acid under pressure. Separation of the fluorine by distillation at a temperature of (150 1) 鳦 by sulphuric acid. The distillation is carried out by the method described in ISO 1693. Formation of a blue coloured complex between fluorine and alizarin complexone/lanthanum chloride reagent at a pH between 4.5 and 4.6. Addition of acetone to increase the stability and sensitivity of the fluorine complex. Spectrophotometric measurement of the complex at a wavelength of about 620 nm. Has also been approved by the IUPAC.