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YS/T 244.1-2008: Chemical analysis methods of high purity aluminium. Part 1: Determination of iron content by 1, 10-phenanthroline-thiocyanate photometric method
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Chemical analysis methods of high purity aluminium. Part 1: Determination of iron content by 1, 10-phenanthroline-thiocyanate photometric method
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YS/T 244.1-2008
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Basic data | Standard ID | YS/T 244.1-2008 (YS/T244.1-2008) | | Description (Translated English) | Chemical analysis methods of high purity aluminium. Part 1: Determination of iron content by 1, 10-phenanthroline-thiocyanate photometric method | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H12 | | Classification of International Standard | 77.040.30 | | Word Count Estimation | 6,697 | | Date of Issue | 2008-03-12 | | Date of Implementation | 2008-09-01 | | Older Standard (superseded by this standard) | YS/T 244.1-1994 | | Regulation (derived from) | NDRC Notice No. 25 of 2008 | | Issuing agency(ies) | National Development and Reform Commission | | Summary | This standard provides high purity aluminum Determination of iron content. This standard applies to high purity iron content. Measuring range: ~ 0. 00050% 0. 00010%. | YS/T 244.1-2008: Chemical analysis methods of high purity aluminium. Part 1: Determination of iron content by 1, 10-phenanthroline-thiocyanate photometric method
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Chemical analysis methods of high purity aluminium.Part 1. Determination of iron content by 1, 10-phenanthroline-thiocyanate photometric method
ICS 77.040.30
H12
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 244.1-1994
Chemical analysis methods of high purity aluminum
Part 1. phenanthroline - thiocyanate
Spectrophotometric determination of iron content
Posted 2008-03-12
2008-09-01 implementation
National Development and Reform Commission issued
Foreword
YS/T 244 "Chemical analysis methods of high purity aluminum" is divided into nine sections.
--- Part 1. phenanthroline - thiocyanate spectrophotometric determination of iron content;
--- Part 2. molybdenum blue extraction and spectrophotometric determination of silicon content;
--- Part 3. Two-antipyrine DAM - spectrophotometric determination of titanium content thiocyanate;
--- Part 4. Butyl Rhodamine B spectrophotometric determination of gallium content;
--- Part 5. Determination of copper, zinc and lead content anodic stripping voltammetry;
--- Part 6. Catalytic manganese - sulfuric acid system through the determination of silver content;
--- Part 7. dithizone extraction and spectrophotometric determination of cadmium content;
--- Part 8. crystal violet extraction and spectrophotometric determination of indium content;
--- Part 9. Determination of impurities by inductively coupled plasma mass spectrometry.
This is Part 1.
The partial replacement of YS/T 244.1-1994 "Chemical analysis methods of high purity aluminum phenanthroline - thiocyanate photometric method for determination of iron content."
This part is YS/T 244.1-1994 revision. Compared with YS/T 244.1-1994, the main changes are as follows.
--- Added "repeatability" clause;
--- Increase the "quality assurance and control" clause.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This part of the Fushun Aluminum Co., Ltd., China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting.
This part of the Fushun Aluminum Co. drafted.
The main drafters of this section. Yang Yuhong, Liu Li, Wang Yuling.
This part of the standard replaces the previous editions are.
--- YS/T 244.1-1994.
Chemical analysis methods of high purity aluminum
Part 1. phenanthroline - thiocyanate
Spectrophotometric determination of iron content
1 Scope
This section provides high purity determination of iron content.
This section applies to the determination of high purity iron content. Measurement range. ~ 0.00010% 0.00050%.
2 Method summary
Sample decomposition with hydrochloric acid, in 2mol/L ~ 3mol/L hydrochloric acid, and methyl isobutyl ketone extraction of iron (Ⅲ), was added phenanthroline - thiocyanate
A mixed solution of potassium, so as to form a ternary complex of iron, measured at 520nm wavelength spectrophotometer absorbance.
5mg high purity nickel and impurities present not interfere with the determination.
3 Reagents
Reagent preparation and analysis of water are secondary deionized water or equivalent purity water.
3.1 ethanol, pure class distinctions.
3.2 methyl isobutyl ketone.
3.3 hydrochloric acid (1 + 1), the quartz distiller purified by distillation.
Hydrochloride 3.4 (1 + 3), of high purity.
3.5 hydrochloric acid (1 + 20), the quartz distiller purified by distillation.
3.6 solution of potassium thiocyanate (500g/L), pure class distinctions.
3.7 Hydrogen peroxide (30%).
3.8 phenanthroline solution (1g/L).
3.9 Mixed solution. 10mL solution of potassium thiocyanate (3.6), 10mL phenanthroline solution (3.8) and 80mL water and mix. The time is now equipped with.
3.10 nickel chloride (NiCl2 · 6H2O) solution (4g/L). Per 100mL solution containing 0.5mL of hydrochloric acid (3.3).
3.11 iron standard stock solution. Weigh 0.1000g metallic iron (purity 99.9%), placed in 100mL beaker, add 20mL hydrochloric acid
(3.3), was slowly heated to dissolve completely, cooled to room temperature, transferred to 1L volumetric flask, dilute to the mark with water and mix. The standard storage solution
Liquid 1mL containing 0.1mg iron.
3.12 Iron standard solution. Pipette 10.00mL iron standard stock solution (3.11), placed in 100mL flask, diluted with hydrochloric acid (3.5)
To the mark, and mix. Then from this solution Pipette 20.00mL in 100mL flask, diluted with hydrochloric acid (3.5) to the mark and mix. this
Standard solution 1mL containing 2μg iron.
4 instruments and equipment
4.1 Spectrophotometer.
4.2 electric centrifuge.
5 Sample
Sample 5.1 with hydrochloric acid (3.4) soaked for more than 3h, washed with deionized water, and dried over anhydrous ethanol (3.1) a dip.
5.2 A sample (5.1) drying at 70 ℃ ~ 80 ℃ 2h ~ 3h, to sulfate, and placed in a desiccator to cool to room temperature.
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