YS/T 240.4-2007Methods for chemical analysis of bismuth concentrate. Determination of tungsten trioxide content. Thiocyanate spectrophotometric method (English PDF)
铋精矿化学分析方法 三氧化钨量的测定 硫氰酸盐分光光度法
YS/T 240.4 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| YS/T 240.4-2024 | Methods for chemical analysis of bismuth concentrate Part 4:Determination of tungsten trioxide contentThiocyanate spectrophotometric method | Valid |
| YS/T 240.4-2007 | Methods for chemical analysis of bismuth concentrate. Determination of tungsten trioxide content. Thiocyanate spectrophotometric method | Obsolete |
YS/T 240.4-2007 is obsolete. It has been replaced by YS/T 240.4-2024. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
National Development and Reform Commission
Level / Type
National · Recommended
Issue date
April 13, 2007
Implementation date
October 1, 2007
Scope
YS/T 240.4-2007 is the English-translated version of 铋精矿化学分析方法 三氧化钨量的测定 硫氰酸盐分光光度法.
YS/T 240.4-2007 is the Chinese industry standard "Methods for chemical analysis of bismuth concentrate. Determination of tungsten trioxide content. Thiocyanate spectrophotometric method".
It was issued on April 13, 2007 by the National Development and Reform Commission, and took effect on October 1, 2007. It is obsolete: it has been replaced by YS/T 240.4-2024.
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Document preview — YS/T 240.4-2007
National Standard of the People's Republic of China
Issued by: National Development and Reform Commission
Contents
- Document data
1 Document data
Sector: National Recommended (industry standard).
Issuing body: National Development and Reform Commission.
Date of issue: 2007-04-13.
Date of implementation: 2007-10-01.
Status: obsolete, replaced by YS/T 240.4-2024.
......
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
YS/T 240.5-2024 — Chemical analysis method for bismuth concentrate - Part 5: Determination of molybdenum content - Thiocyanate spectrophotometry
YS/T 240.3-2007 — Methods for chemical analysis of bismuth concentrate. Determination of silicon dioxide content. Molybdenum blue spectrophotometric method and gravimetric method
YS/T 240.5-2007 — Methods for chemical analysis of bismuth concentrate. Determiantion of molybdenum content. Thiocyanate spectrophotometric method
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YS/T 240.4-2007
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