GB/T 4325.3-2013Methods for chemical analysis of molybdenum - Part 3: Determination of bismuth content - Atomic fluorescence spectrometry (English PDF)
钼化学分析方法 第3部分：铋量的测定 原子荧光光谱法
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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 4325.3-2013 is the English-translated version of 钼化学分析方法 第3部分：铋量的测定 原子荧光光谱法.
GB/T 4325.3-2013 is the Chinese standard "Methods for chemical analysis of molybdenum - Part 3: Determination of bismuth content - Atomic fluorescence spectrometry".
Its scope clause reads: GB/T 4325 This section specifies the method for determination of molybdenum bismuth content. This section applies to molybdenum powder, molybdenum, molybdenum trioxide, ammonium molybdate determination of bismuth content.
Measurement range. 0.0001% to 0.0050%. Its clauses include method summary; reagents; instrument.
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Document preview — GB/T 4325.3-2013
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 4325.2-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Reagents
- 4 Instrument
1 Scope
GB/T 4325 This section specifies the method for determination of molybdenum bismuth content.
This section applies to molybdenum powder, molybdenum, molybdenum trioxide, ammonium molybdate determination of bismuth content. Measurement range. 0.0001% to 0.0050%.
2 Method summary
Sample of nitric acid, hydrochloric acid decomposition. In hydrochloric acid medium to form a hydride with sodium borohydride and the role of bismuth, the import hydride atomizer,
In hollow cathode lamp as the light source, the fluorescence intensity of bismuth at the atomic fluorescence spectrometer, within a certain range, and fluorescence intensity measured element
Proportional to the content. Join molybdenum substrate can eliminate interference.
3 Reagents
Unless otherwise indicated, the reagents used in this section are excellent pure, the water is two or more than two water water.
3.1
of sodium borohydride.
3.2
sodium hydroxide.
3.3
nitric acid (rho = 1.42g/mL).
3.4
hydrochloric acid (rho = 1.19g/mL).
3.5
hydrochloride (19).
3.6
nitric acid (11).
3.7
ammonia (199).
3.8
Ammonia (2mol/L).
3.9 bismuth standard stock solution
Weigh 0.1000g bismuth (wBi>=99.99%) in 250mL beaker, add 100mL nitric acid (3.6), dissolved by heating, oxides of nitrogen purge after boiling, cooled and transferred to 1000mL volumetric flask, dilute to groove. This solution 1mL
Bismuth-containing 100µg.
3.10 Bismuth standard solution
Pipette 1.00mL standard bismuth stock solution (3.9) in 100mL volumetric flask, was added 10mL of hydrochloric acid (3.4),
Dilute with water to volume, and mix. This solution 1mL containing 1µg bismuth.
3.11 a solution of sodium borohydride (15g/L)
Weigh 1.5g of sodium borohydride was added 0.5g of sodium hydroxide previously dissolved in 100mL water, after
After the dissolution of the whole shake up, the time is now equipped with.
3.12 molybdenum substrate solution
Weigh 7.4977g pure molybdenum in 100mL beaker, 100mL added ammonia (3.8), low-temperature heating
Dissolved and then diluted with aqueous ammonia (3.7) to 100mL, shake well and set aside. This solution 1mL containing 50mg molybdenum.
3.13
argon, the volume fraction of not less than 99.99%.
4 Instrument
Atomic fluorescence spectrometer, with bismuth special hollow cathode lamp.
......
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 4325.3
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4325.3-2013 | Methods for chemical analysis of molybdenum - Part 3: Determination of bismuth content - Atomic fluorescence spectrometry | current edition | Current |
| GB/T 4325.2-1984 | Methods for chemical analysis of molybdenum - Part 3: Determination of bismuth content - Atomic fluorescence spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 4325.3-2013. Earlier editions are listed for reference only.
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GB/T 4325.1-2013 — Methods for chemical analysis of molybdenum - Part 1: Determination of lead content - Graphite furnace atomic absorption spectrometry
GB/T 4325.10-2013 — Methods for chemical analysis of molybdenum - Part 10: Determination of copper content - Flame atomic absorption spectrometry
GB/T 4325.11-2013 — Methods for chemical analysis of molybdenum - Part 11: Determination of aluminum content - Chromazurol S spectrophotometry and inductively coupled plasma atomic emission spectrometry
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