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Standard Insuued on: 1990-12

GB/T 12690.21-1990    Rare-earth metals and their oxides--Determination of phosphorus content--Molybdenum blue spectrophotometric method
稀土金属及其氧化物化学分析方法 钼蓝分光光度法测定磷量
Category No.:GB Valid Status:superseded
Issued Organization: Issued Date:1990-12-30
Implemented Date:1992-1-1 Abolished Date:2004-06-01
Superseded Standard.:GB/T 12690.10-2003 Gadolinium oxide-Determination of samarium oxide, europium oxide, terbium oxide, dysprosium oxide a
Superseded Date:2004-6-1
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GB/T 678-1990   GB/T 12600-1990   GB/T 12545.1-2008   GB/T 12529.1-2008   GB/T 12529.3-2008   GB 13022-1991   GB/T 12690.21-1990   GB/T 12689.5-1990   GB/T 12689.1-1990   GB/T 12690.13-1990   GB 2367-1990   GB/T 12689.4-1990   GB/T 12689.14-1990   GB/T 12761-1991   GB/T 12690.25-1990   GB/T 12689.6-1990   GB/T 12689.7-1990   GB 2961-1990   GB/T 12689.13-1990   GB/T 12689.12-1990  

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