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YS/T 227.9-2010: Methods for chemical analysis of tellurium. Part 9: Determination of tellurium content. Potassium bichromate-ammonium ferrous sulfate titration YS/T 227.9: Evolution and historical versions
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| YS/T 227.9-2010 | English | 209 |
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Methods for chemical analysis of tellurium. Part 9: Determination of tellurium content. Potassium bichromate-ammonium ferrous sulfate titration
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YS/T 227.9-2010
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| YS/T 227.9-1994 | English | 199 |
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Determination of tellurium content in tellurium. Potassium dichromate-ammonium ferrous sulfate volumetric method
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YS/T 227.9-1994
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PDF similar to YS/T 227.9-2010
Basic data | Standard ID | YS/T 227.9-2010 (YS/T227.9-2010) | | Description (Translated English) | Methods for chemical analysis of tellurium. Part 9: Determination of tellurium content. Potassium bichromate-ammonium ferrous sulfate titration | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,620 | | Date of Issue | 2010-11-22 | | Date of Implementation | 2011-03-01 | | Older Standard (superseded by this standard) | YS/T 227.9-1994 | | Regulation (derived from) | MIIT (2010) No. 126 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the determination of tellurium in tellurium method. This standard applies to the determination of tellurium in tellurium. Measuring range: 955 ~ 99. 5%. | YS/T 227.9-2010: Methods for chemical analysis of tellurium. Part 9: Determination of tellurium content. Potassium bichromate-ammonium ferrous sulfate titration
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Methods for chemical analysis of tellurium.Part 9. Determination of tellurium content.Potassium bichromate-ammonium ferrous sulfate titration
ICS 77.120.99
H13
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 227.9-1994
Methods for chemical analysis of tellurium
Part 9. Determination of tellurium content
Potassium dichromate - ammonium ferrous sulfate volumetric method
Part 9. Determinationofteluriumcontent-
Issued on. 2010-11-22
2011-03-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 227 "tellurium chemical analysis methods," a total of 12 parts.
--- Part 1. Determination of bismuth content hydride generation - atomic fluorescence spectrometry;
--- Part 2. Determination of aluminum content Chromazurol S- bromo cylpyridinium micellar solubilization spectrophotometry;
--- Part 3. Determination of lead content by flame atomic absorption spectrometry;
--- Part 4. Determination of iron content - Phenanthroline spectrophotometric method;
--- Part 5. determination of selenium content of 2,3-diaminonaphthalene spectrophotometry;
--- Part 6. Determination of copper content of solid-liquid separation - flame atomic absorption spectrometry;
--- Part 7. Determination of sulfur content by inductively coupled plasma atomic emission spectrometry;
--- Part 8. magnesium, sodium content - Flame atomic absorption spectrometry;
--- Part 9. Determination of tellurium content of potassium dichromate - ammonium ferrous sulfate volumetric method;
--- Part 10. Determination of arsenic content by hydride generation - atomic fluorescence spectrometry;
--- Part 11. Determination of silicon content of n-butanol silicon molybdenum blue spectrophotometric method;
--- Part 12. bismuth, aluminum, lead, iron, selenium, copper, magnesium, sodium, arsenic content - Inductively coupled plasma atomic emission spectrometry.
Part is divided into 9 parts.
This section drafted in accordance with GB/T 1.1-2009 given rules.
"Determination of tellurium in the tellurium content (potassium dichromate - ammonium ferrous sulfate volumetric method)" in this section instead of YS/T 227.9-1994. And YS/T 227.9-
Compared to 1994, this section has the following changes.
--- Measured by the 98.5% limit adjusted to 95%;
--- Complements the precision, quality assurance and control provisions;
--- Complements the "test report" requirement.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is responsible for drafting unit. Zhuzhou Smelter Group Co., Ltd.
This section is drafted. JCC.
Participated in the drafting of this section. Sichuan Apollo Solar Science and Technology Co., Ltd., Zhuzhou Smelter Group Co., Ltd.
The main drafters of this section. Lu Lin, a Hu continued, Wang Xueping, Luyin too, Zhang Dongguang, Zhou Yi.
This part of the standard replaces the previous editions are.
--- YS/T 227.9-1994;
--- GB/T 2145-1980.
Methods for chemical analysis of tellurium
Part 9. Determination of tellurium content
Potassium dichromate - ammonium ferrous sulfate volumetric method
Warning. Use of this standard shall have a person experiences regular laboratory work. This standard does not point out all possible security issues.
Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
YS/T of the provisions of the section 227 determination of tellurium in the tellurium content.
This section applies to the determination of tellurium in the tellurium content. Measuring range. 95% to 99.5%.
2 principle of the method
The sample is dissolved in nitric acid, sulfuric smoke, sulfuric acid, phosphoric acid, potassium dichromate oxidation telluric acid into telluric acid, for use with sodium
Indicator, with an excess of ferrous ammonium sulfate standard titration solution of potassium dichromate, this determination of tellurium content.
In the measurement sample containing 0.2% respectively, silver, antimony, arsenic and 5.0% copper, iron, selenium, lead, silicon, magnesium, tin, aluminum, bismuth, sodium did not affect the
Determination.
When antimony, arsenic greater than 0.2%, less than 5.0%, the bromine can be oxidized to As (Ⅴ), Sb (Ⅴ), to eliminate the As (Ⅲ),
Sb (Ⅲ) interference. MnO4-, Cr2O72-, Br2 other strong oxide sample decomposition caused when part of Te (Ⅳ) oxidation of Te (Ⅵ), adopt
Treated with hydrochloric acid to restore it.
3 Reagents
Unless otherwise indicated, used in the analysis confirmed analytically pure reagents and distilled or deionized water or equivalent purity.
Nitrate 3.1 (ρ1.42g/mL).
3.2 hydrochloride (ρ1.19g/mL).
3.3 phosphoric acid (ρ1.70g/mL).
3.4 sulfate (ρ1.84g/mL).
3.5 bromine.
3.6 sulfate (11).
3.7 ferrous ammonium sulfate standard solution (approximately 0.1mol/L). Weigh 39.2g ferrous ammonium sulfate and dissolved in sulfuric acid (0.5mol/L), and moved to
1000mL brown volumetric flask, dilute to the mark with sulfuric acid (0.5mol/L), and shake. In the shade, after standing 24h use.
3.8 standard potassium dichromate solution [c (1/6K2Cr2O7) = 0.2000mol/L].
3.8.1 preparation. Weigh 9.8060g baseline potassium dichromate (previously at 120 ℃ drying to constant weight), dissolved in a little water and transferred to 1000mL
Volumetric flask, dilute to the mark, shake.
3.8.2 The ratio of potassium dichromate standard solution (3.8) and ferrous ammonium sulfate standard solution (3.7) (K) of the assay. Pipette 10.00mL dichromate
Potassium standard solution (3.8), placed in a triangular 500mL beaker, add 200mL of water, 10 mL of hydrochloric acid (3.2), 20mL sulfuric acid (3.6),
5mL phosphate (3.3), 8 drops of sodium diphenyl ammonia solution (3.9), the standard ferrous ammonium sulfate solution (3.7) Analysis by titration step. ratio
(K) is measured along with the sample simultaneously.
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