GB/T 8762.5-1988 Yttrium oxide of phosphor grade--Determination of trace rare earth oxide contents--Spectrochemical method and direct spectrographic method
荧光级氧化钇中微量稀土氧化物测定 化学光谱和直接光谱法 ;
Category No.: | 71.060.20 |
Valid Status: | superseded |
Issued Organization: | National Bureau of Standards |
Issued Date: | 1988-02-25 |
Implemented Date: | 1989-2-1 |
Abolished Date: | |
Superseded Standard.: | GB/T 18115.12-2006 Chemical analysis methods of rare earth impurities in rare earth metals and their oxides Yttrium - Determination of lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lu
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Superseded Date: | 2006-10-1 |