GB/T 17418.4-1998Methods for analysis of noble metals in geochemical samples--Determination of iridium content-Preconcentration by thiourea-Catalytic spectrophotometric method (English PDF)
地球化学样品中贵金属分析方法 硫脲富集-催化分光光度法测定铱量
GB/T 17418.4 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| GB/T 17418.4-2010 | Methods for analysis of noble metals in geochemical samples - Part 4: Determination of iridium content - Preconcentration by thiourea-catalytic spectrophotometric method | Valid |
| GB/T 17418.4-1998 | Methods for analysis of noble metals in geochemical samples--Determination of iridium content-Preconcentration by thiourea-Catalytic spectrophotometric method | Obsolete |
GB/T 17418.4-1998 is obsolete. It has been replaced by GB/T 17418.4-2010. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
State Bureau of Quality and Technical Supervision
Level / Type
National · Recommended
Issue date
June 17, 1998
Implementation date
January 1, 1999
Scope
GB/T 17418.4-1998 is the English-translated version of 地球化学样品中贵金属分析方法 硫脲富集-催化分光光度法测定铱量.
GB/T 17418.4-1998 is the Chinese national standard "Methods for analysis of noble metals in geochemical samples--Determination of iridium content-Preconcentration by thiourea-Catalytic spectrophotometric method".
It was issued on June 17, 1998 by the State Bureau of Quality and Technical Supervision, and took effect on January 1, 1999. It is obsolete: it has been replaced by GB/T 17418.4-2010.
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Document preview — GB/T 17418.4-1998
National Standard of the People's Republic of China
Issued by: State Bureau of Quality and Technical Supervision
Contents
- Document data
1 Document data
Sector: National standard (Recommended).
Issuing body: State Bureau of Quality and Technical Supervision.
Date of issue: 1998-06-17.
Date of implementation: 1999-01-01.
Status: obsolete, replaced by GB/T 17418.4-2010.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
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Related Standards
GB/T 17418.5-2010 — Methods for analysis of noble metals in geochemical samples - Part 5: Determination of ruthenium and osmium content - Separationby distillation-catalytic spectrophotometric method
GB/T 17418.3-1998 — Methods for analysis of noble metals in geochemical samples--Determination of palladium content-Preconcentration by thiourea-Graphite furnace atomic absorption spectrophotometric method
GB/T 17418.5-1998 — Methods for analysis of noble metals in geochemical samples--Determination of ruthenium and osmium content-Separation by distillation-Catalytic spectrophotometric method
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GB/T 17418.4-1998
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