GB/T 4325.18-2013Methods for chemical analysis of molybdenum - Part 18: Determination of vanadium content - N-benzoyl-N-phenylhydroxylamine spectrophotometry and inductively coupled plasma atomic emission spectrometry (English PDF)
钼化学分析方法 第18部分：钒量的测定 钽试剂分光光度法和电感耦合等离子体原子发射光谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 9, 2013
Implementation date
February 1, 2014
Scope
GB/T 4325.18-2013 is the English-translated version of 钼化学分析方法 第18部分：钒量的测定 钽试剂分光光度法和电感耦合等离子体原子发射光谱法.
GB/T 4325.18-2013 is the Chinese standard "Methods for chemical analysis of molybdenum - Part 18: Determination of vanadium content - N-benzoyl-N-phenylhydroxylamine spectrophotometry and inductively coupled plasma atomic emission spectrometry".
Its scope clause reads: GB/T 4325 This section specifies the method for determination of molybdenum vanadium content. This section applies to molybdenum powder, molybdenum, molybdenum trioxide, ammonium molybdate vanadium contents.
A method for determining the scope and method II are 0.0005% to 0.0100%. Its clauses include general; reagent spectrophotometric method of a tantalum.
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Document preview — GB/T 4325.18-2013
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 4325.20-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 General
- 4 reagent spectrophotometric method of a tantalum
1 Scope
GB/T 4325 This section specifies the method for determination of molybdenum vanadium content.
This section applies to molybdenum powder, molybdenum, molybdenum trioxide, ammonium molybdate vanadium contents. A method for determining the scope and method II are
0.0005% to 0.0100%.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) apply to this section.
GB/T 6682 analytical laboratory use specifications and test methods (ISO 3696)
GB/T 12806 Laboratory glassware single marking flask (ISO 1042)
GB/T 12808 standard laboratory glassware single line pipette (ISO 648)
GB/T 12809 laboratory design and construction principles of glassware gauges (ISO 384)
GB/T 12810 calibration laboratory capacity and methods of use of glassware gauges (ISO 4787)
3 General
3.1
Unless otherwise stated, the use of analytical reagent only recognized in the analysis; the water is distilled or deionized water or equivalent purity,
Shall comply with GB/T 6682's.
3.2
instruments shall be within the test cycle, the performance indicators should meet the technical parameters required for verification; glass containers GB/T 12808,
GB/T 12809, GB/T 12806 stipulated A-level, with reference to the specific use of GB/T 12810 of.
4 reagent spectrophotometric method of a tantalum
4.1 Method summary
Sample decomposition by aqua regia. Hydrochloric acid acidity 2mol/L ~ 3mol/L, in the presence of citrate, acetyl acetone - chloroform extraction
Separation of molybdenum. In 3mol L ~ 6mol L hydrochloric acid solution//, the pentavalent vanadium and tantalum reagent generated purple complex, extracted with chloroform, to
515nm wavelength spectrophotometer measured absorbance.
4.2 Reagents
4.2.1
citric acid.
4.2.2
sulfuric acid (rho = 1.84g/mL).
4.2.3
nitric acid (rho = 1.42g/mL).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 4325.18
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4325.18-2013 | Methods for chemical analysis of molybdenum - Part 18: Determination of vanadium content - N-benzoyl-N-phenylhydroxylamine spectrophotometry and inductively coupled plasma atomic emission spectrometry | current edition | Current |
| GB/T 4325.20-1984 | Methods for chemical analysis of molybdenum - Part 18: Determination of vanadium content - N-benzoyl-N-phenylhydroxylamine spectrophotometry and inductively coupled plasma atomic emission spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 4325.18-2013. Earlier editions are listed for reference only.
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Related Standards
GB/T 4325.19-2013 — Methods for chemical analysis of molybdenum - Part 19: Determination of chromium content - Diphenylcarbazide spectrophotometry
GB/T 4325.17-1984 — Methods for chemical analysis of molybdenum--The atomic absorption spectrophotometric method for the determination of sodium content
GB/T 4325.19-1984 — Methods for chemical analysis of molybdenum--The diantipyrylmethane photometric method for the determination of titanium content
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