YS/T 227.5-2010 English PDF

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YS/T 227.5-2010: Methods for chemical analysis of tellurium. Part 5: Determination of selenium content. 2, 3-Diamino naphthalene spectrophotometry

YS/T 227.5: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 227.5-2010	209	Add to Cart	3 days	Methods for chemical analysis of tellurium. Part 5: Determination of selenium content. 2, 3-Diamino naphthalene spectrophotometry
YS/T 227.5-1994	199	Add to Cart	2 days	Determination of selenium content in tellurium. 2, 3-diaminonaphthalene absorption photometric method	Obsolete

Similar standards

GB/T 3884.2   GB/T 3884.1   YS/T 252.1   YS/T 227.12   YS/T 227.1   YS/T 227.10   

Basic data

Standard ID: YS/T 227.5-2010 (YS/T227.5-2010)
Description (Translated English): Methods for chemical analysis of tellurium. Part 5: Determination of selenium content. 2, 3-Diamino naphthalene spectrophotometry
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H13
Classification of International Standard: 77.120.99
Word Count Estimation: 6,648
Date of Issue: 2010-11-22
Date of Implementation: 2011-03-01
Older Standard (superseded by this standard): YS/T 227.5-1994
Regulation (derived from): MIIT (2010) No. 126
Issuing agency(ies): Ministry of Industry and Information Technology
Summary: This standard specifies the determination of selenium tellurium method. This standard applies to the determination of selenium tellurium. Measuring range: 0. 0015% to 0. 030%

YS/T 227.5-2010: Methods for chemical analysis of tellurium. Part 5: Determination of selenium content. 2, 3-Diamino naphthalene spectrophotometry

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods for chemical analysis of tellurium.Part 5. Determination of selenium content.2, 3-Diamino naphthalene spectrophotometry ICS 77.120.99 H13 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 227.5-1994 Methods for chemical analysis of tellurium Part 5. Determination of the amount of selenium 2,3-diaminonaphthalene spectrophotometry Part 5. Determinationofseleniumcontent- 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. This is Part 5. This section drafted in accordance with GB/T 1.1-2009 given rules. The partial replacement of YS/T 227.5-1994 "Determination of the amount of selenium tellurium (2,3-diaminonaphthalene photometric method)." And YS/T 227.5- Compared to 1994, this section has the following changes. --- Measured by the scope of 0.0015% to 0.06% was adjusted to 0.0015% ~ 0.030%; --- 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. Beijing General Research Institute of Mining and Metallurgy. Participated in the drafting of this section. Liaoning Entry Inspection and Quarantine Bureau, Zhuzhou Smelter Group Co., Ltd. The main drafters of this section. Yuanyu Xia, Chen Chao Yan, Chen Geng Dian, Li Yan, Dong Xiuwen, Lu Qingqing, Xiao Xiaohui. This part of the standard replaces the previous editions are. --- YS/T 227.5-1994; --- GB/T 2141-1980. Methods for chemical analysis of tellurium Part 5. Determination of the amount of selenium 2,3-diaminonaphthalene spectrophotometry 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 content of selenium. This section applies to the determination of tellurium content of selenium. Measurement range. 0.0015% to 0.030%.

2 principle of the method

Samples with hydrochloric acid, nitric acid dissolved in about pH = 1 solution, ammonium citrate complex tellurium, 2,3-diaminonaphthalene as chromogenic reagent, in water Bath heating and selenium color forms a colored complex in a spectrophotometer at 490nm wavelength measured absorbance, calculated using the working curve method result.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. Nitrate 3.1 (ρ1.43g/mL). 3.2 hydrochloride (ρ1.19g/mL). 3.3 Ammonia (ρ0.90g/mL). 3.4 mixed acid. A 90mL hydrochloric acid (3.2) and 30mL of nitric acid (3.1) and mix before use formulation. 3.5 ammonium citrate solution (500g/L). 3.6 Disodium ethylenediaminetetraacetate solution (10g/L). 3.7 2,3-diaminonaphthalene solution (1g/L). Weigh 0.10g2,3- diaminonaphthalene, placed in 200mL beaker, hydrochloric acid solution was added 50mL Solution (0.1mol/L), was heated to near boiling water bath for 5min dissolved out sufficiently stirred 5min, a solution of hydrochloric acid was added 50mL (0.1mol/L), Stir with a slow quantitative filter paper into a brown bottle, valid for one week. 3.8 Selenium standard stock solution. Weigh 0.1000g selenium (≥99.95%), placed in a beaker of 100mL, 10mL of nitric acid was added (11), Low heat to dissolve, remove oxides of nitrogen, cooled and transferred to 1000mL volumetric flask, dilute with water to the mark. This solution 1mL Containing 100μg selenium. 3.9 Selenium standard solution. Pipette 30.00mL solution (3.8), placed in 100mL flask, diluted with water to the mark. This solution 1mL containing 30μg selenium.

4 Instrument

Spectrophotometer. ......

Image     

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