GB/T 25934.1-2010Methods for the chemical analysis of high-purity gold - Part 1: Determination of impurity elements by ethyl acetate extraction separation and inductively coupled plasma atomic emission spectrometry (English PDF)
高纯金化学分析方法 第1部分：乙酸乙酯萃取分离ICP-AES法 测定杂质元素的含量
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC
Level / Type
National · Recommended
Issue date
December 23, 2010
Implementation date
September 1, 2011
Scope
GB/T 25934.1-2010 is the English-translated version of 高纯金化学分析方法 第1部分：乙酸乙酯萃取分离ICP-AES法 测定杂质元素的含量.
GB/T 25934.1-2010 is the Chinese standard "Methods for the chemical analysis of high-purity gold - Part 1: Determination of impurity elements by ethyl acetate extraction separation and inductively coupled plasma atomic emission spectrometry".
Its scope clause reads: GB/T 25934 in the provisions of this part of the impurity elements in high purity gold determination. This section applies to the determination of 99.999% pure gold in high impurity element, measuring element and measuring an amount ranging from Table 1.
Table 1 Content range /% Content range /% Content range /% Content range /% Ag 0.00002 ~ 0.00100 Al 0.00002 ~ 0.00100 As 0.00002 ~ 0.00098 Bi 0.00002 ~ 0.00100 Cd 0.00002 ~ 0.00100 Cr 0.00002 ~ 0.00099 Cu 0.00002 ~ 0.00100 Fe 0.00010 ~ 0.00100 Ir 0.00002 ~ 0.00100 Mg 0.00010 ~ 0.00100 Mn 0.00002 ~ 0.00100 Ni 0.00002 ~ 0.00099 Pb 0.00002 ~ 0.00100 Pd 0.00002 ~ 0.00100 Pt 0.00002 ~ 0.00099 Rh 0.00002 ~ 0.00100 Sb 0.00002 ~ 0.00100 Se 0.00002 ~ 0.00100 Te 0.00002 ~ 0.00100 Ti 0.00002 ~ 0.00099 Zn 0.00010 ~ 0.00100. Its clauses include principle of the method; reagents.
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Document preview — GB/T 25934.1-2010
National Standard of the People's Republic of China
- ICS
- 77.040.30
- Classification
- H 15
Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 principle of the method
- 3 Reagents
1 Scope
GB/T 25934 in the provisions of this part of the impurity elements in high purity gold determination.
This section applies to the determination of 99.999% pure gold in high impurity element, measuring element and measuring an amount ranging from Table 1.
Table 1
Content range /%
Content range /%
Content range /%
Content range /%
Ag 0.00002 ~ 0.00100 Al 0.00002 ~ 0.00100 As 0.00002 ~ 0.00098 Bi 0.00002 ~ 0.00100
Cd 0.00002 ~ 0.00100 Cr 0.00002 ~ 0.00099 Cu 0.00002 ~ 0.00100 Fe 0.00010 ~ 0.00100
Ir 0.00002 ~ 0.00100 Mg 0.00010 ~ 0.00100 Mn 0.00002 ~ 0.00100 Ni 0.00002 ~ 0.00099
Pb 0.00002 ~ 0.00100 Pd 0.00002 ~ 0.00100 Pt 0.00002 ~ 0.00099 Rh 0.00002 ~ 0.00100
Sb 0.00002 ~ 0.00100 Se 0.00002 ~ 0.00100 Te 0.00002 ~ 0.00100 Ti 0.00002 ~ 0.00099
Zn 0.00010 ~ 0.00100
2 principle of the method
Sample with a mixed acid dissolved in hydrochloric acid 1mol/L, the separation of gold extracted with ethyl acetate, the aqueous phase was concentrated into a certain acidity
The liquid to be tested, inductively coupled plasma atomic emission spectrometer spectral intensity of each element.
3 Reagents
Unless otherwise indicated, used in the analysis confirmed only for the gifted class pure reagents and double distilled water or equivalent purity (resistivity
>=18.2Mohm/cm) of water.
3.1
hydrochloric acid (rho1.19g/mL), pure class distinctions.
3.2
nitrate (rho1.42g/mL), pure class distinctions.
3.3
sulfate (rho1.84g/mL), pure class distinctions.
3.4
hydrofluoric acid (rho1.15g/mL), pure class distinctions.
3.8
hydrochloride (111).
Mixed acid 3.9. 1 volume of nitric acid (3.2), 3 volumes of hydrochloric acid (3.1) and 3 volumes of water and mix well.
3.10 ethyl acetate
with hydrochloric acid (3.8) and washed 2 to 3 times reserve.
3.11
Standard stock solution.
3.11.1 silver standard stock solution
Weigh 0.1000g metallic silver (mass fraction >=99.99%) in 100mL beaker, add 10mL
Nitric acid solution (3.6), dissolved by heating low temperature, volatilization of oxides of nitrogen, cooled to room temperature, transferred to 100mL volumetric flask, was added 25mL of hydrochloric acid (3.1), dilute to the mark and mix. 1mL solution containing 1mg silver. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 25933-2010 — High-purity gold
GB/T 6682-2008 — Water for analytical laboratory use - Specification and test methods
GB/T 8170-2008 — Rules of rounding off for numerical values & expression and judgement of limiting values
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