GB/T 12690.2-1990Lanthanum oxide--Determination of neodymium oxide, cerium oxide, praseodymium oxide, samarium oxide and yttrium oxide contents-Emission spectrographic method (English PDF)
GB/T 12690.2 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| GB/T 12690.2-2015 | Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides - Part 2: Determination of ignition loss content of rare earth oxides - Gravimetric method | Valid |
| GB/T 12690.2-2002 | Chemical analysis methods for non-RE impurity of rare earth metals and their oxides - Determination of ignition loss content of rare earth oxides - Gravimetric method | Obsolete |
| GB/T 12690.2-1990 | Lanthanum oxide--Determination of neodymium oxide, cerium oxide, praseodymium oxide, samarium oxide and yttrium oxide contents-Emission spectrographic method | Obsolete |
GB/T 12690.2-1990 is obsolete. It has been replaced by GB/T 12690.2-2002. This page sells the obsolete edition, for projects and contracts that still cite it.
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Level / Type
National · Recommended
Scope
GB/T 12690.2-1990 (Lanthanum oxide--Determination of neodymium oxide, cerium oxide, praseodymium oxide, samarium oxide and yttrium oxide contents-Emission spectrographic method) is available as an English-translated PDF.
GB/T 12690.2-1990 is the Chinese national standard "Lanthanum oxide--Determination of neodymium oxide, cerium oxide, praseodymium oxide, samarium oxide and yttrium oxide contents-Emission spectrographic method". It is obsolete: it has been replaced by GB/T 12690.2-2002.
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Document preview — GB/T 12690.2-1990
Contents
- Document data
1 Document data
Sector: National standard (Recommended).
Status: obsolete, replaced by GB/T 12690.2-2002.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
Referenced standards
Cited by
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- GB/T 31968-2025Rare earth composite yttrium zirconium oxide ceramic powder
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- GB/T 45009-2024Ytterbium silicate powder for rare earth environmental barrier coatings
- GB/T 38061-2019Cerium dioxide nanomaterial
- GB/T 13219-2018Scandium oxide
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Related Standards
GB/T 12690.3-2015 — Chemical analysis methods for non-rare earth impurities in rare earth metals and their oxides - Part 3: Determination of the water content of rare earth oxides - Gravimetric method
GB/T 12690.1-1990 — Lanthanum oxide--Determination of cerium oxide, praseodymium oxide, nedeodynium oxide, samarium oxide and yttrium oxide--Induetively coupled plasma atomic emission spectrographic method
GB/T 12690.3-2002 — Chemical analysis methods for non-RE impurity of rare earth metals and their oxides - Determination of water content of rare earth oxides - Gravimetric method
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GB/T 12690.2-1990
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