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YS/T 226.7-2009 English PDF

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US$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
YS/T 226.7-2009: Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry
Status: Valid

YS/T 226.7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 226.7-2009	169	Add to Cart	3 days	Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry	Valid
YS/T 226.7-1994	199	Add to Cart	2 days	Determination of silicon content in selenium--Silicon-molybdenum blue photometric method	Obsolete

Similar standards

GB/T 14849.3 GB/T 14849.1 GB/T 37385 YS/T 226.3 YS/T 226.4 YS/T 226.2

Basic data

Standard ID: YS/T 226.7-2009 (YS/T226.7-2009)
Description (Translated English): Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H17
Classification of International Standard: 77.120.99
Word Count Estimation: 6,644
Date of Issue: 2009-12-04
Date of Implementation: 2010-06-01
Older Standard (superseded by this standard): YS/T 226.11-1994
Regulation (derived from): MIIT [2009] No. 66
Issuing agency(ies): Ministry of Industry and Information Technology
Summary: This standard specifies the amount of selenium in the determination of magnesium. This standard applies to the determination of selenium in the amount of magnesium. Measuring range: 0. 0002% to 0. 02%.

YS/T 226.7-2009: Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry

---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 selenium.Part 7. Determination of magnesium content.Flame atomic absorption spectrometry ICS 77.120.99 H17 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 226.11-1994 Chemical analysis of selenium Part 7. Determination of magnesium content Flame Atomic Absorption Spectrometry Posted 2009-12-04 2010-06-01 implementation Ministry of Industry and Information Technology of the People's Republic of China released

Foreword

YS/T 226 "selenium chemical analysis method" is divided into 13 parts. --- Part 1. Determination of bismuth content - Hydride Generation - Atomic Fluorescence Spectrometry --- Part 2. Determination of antimony content Hydride Generation - Atomic Fluorescence Spectrometry --- Part 3. Determination of aluminum content Chromazurol S- cetylpyridinium bromide spectrophotometric method --- Part 4. Determination of mercury content of dithizone - CTC colorimetric titration --- Part 5. Determination of the amount of silicon silicon molybdenum blue spectrophotometry --- Part 6. Determination of sulfur content symmetrical diphenyl semicarbazide spectrophotometry --- Part 7. Determination of magnesium content - Flame atomic absorption spectrometry --- Part 8. Determination of copper content - Flame atomic absorption spectrometry --- Part 9. Determination of iron content by flame atomic absorption spectrometry --- Part 10. Determination of nickel content by flame atomic absorption spectrometry --- Part 11. Determination of lead content by flame atomic absorption spectrometry --- Part 12. Determination of the amount of selenium sodium thiosulfate volumetric method --- Part 13. silver, aluminum, arsenic, boron, mercury, bismuth, copper, cadmium, iron, gallium, indium, magnesium, nickel, lead, silicon, antimony, tin, tellurium, titanium, zinc contents Inductively Coupled Plasma Mass Spectrometry This section YS/T Section 7226 of. The measured partial replacement of YS/T 226.11-1994 "selenium magnesium, copper, iron, nickel content - Flame atomic absorption spectrometric method" in the amount of magnesium Given portion. Compared with YS/T 226.11-1994, this section has the following main changes. --- Measurement by the scope of 0.0002% ~ 0.002% revised to 0.0002% to 0.02%; --- Increased draw a calibration curve; --- Supplementary terms of quality assurance and control; --- Increase the repeatability limit, will be allowed to poor reproducibility limit. The non-ferrous metal part by the National Standardization Technical Committee and centralized. This section is responsible for drafting unit. Jinchuan Group Limited. Participated in the drafting of this section. Beijing Nonferrous Metal Research Institute, Guangzhou Nonferrous Metal Research Institute. The main drafters of this section. Zhang Zhi hair, dry Yong, Shi Jingjing, Lin Hsiu-ying, in Xiaoxia, Liu Hong, Gao Yan. This part of the standard replaces the previous editions are. --- GB 2120-1980; --- YS/T 226.11-1994. Chemical analysis of selenium Part 7. Determination of magnesium content Flame Atomic Absorption Spectrometry

1 Scope

This section YS/T 226 specifies the method for determination of selenium in magnesium content. This section applies to the determination of selenium in magnesium content. Measurement range. 0.0002% to 0.02%.

2 Method summary

Sample decomposition with nitric acid at 320 ℃ volatile removing selenium, strontium salt added to eliminate the interference of coexisting elements, 3% hydrochloric acid medium, empty Gas - acetylene flame magnesium were measured absorbance at the wavelength of 285.2nm, and calculate the amount of magnesium by working curve method.

3 Reagents

Unless otherwise indicated, the second part of the water are distilled water, reagents were pure class distinctions. Nitrate 3.1 (ρ1.42g/mL). 3.2 hydrochloride (ρ1.19g/mL). 3.3 hydrochloric acid (1 + 2). 3.4 strontium solution (10g/L). Weigh 30.43g strontium chloride (excellent pure), placed in 250mL beaker, dissolved in water. Moved to 1000mL Volumetric flask, dilute to the mark, shake. 3.5 Magnesium standard stock solution. Weigh 1.658g of magnesium oxide (high purity, at 800 ℃ after pre-ignition to constant weight in a desiccator and cooled to room Temperature) was placed in 250mL beaker, add 20mL of nitric acid (3.1), after driving the acid smoke removed, washed with water and dish table Beibi, cool, moved 1000mL volumetric flask, constant volume of water, this solution 1mL containing 1mg magnesium. 3.5.1 Magnesium standard solution A. Pipette 5.00mL magnesium standard stock solution (3.5), placed 1000mL volumetric flask, dilute to the mark with water Degree, shake. This solution 1mL containing 5μg magnesium. 3.5.2 Magnesium standard solution B. Pipette 25.00mL magnesium standard stock solution (3.5), placed 1000mL volumetric flask, dilute to the mark with water Degree, shake. This solution 1mL containing 25μg magnesium.

4 Instrument

4.1 Atomic absorption spectrometer, with a magnesium hollow cathode lamp. Under optimum working conditions for those who can reach the following indicators can be used. --- Characteristic concentration. the test solution is consistent with the measurement of the solution, characterized in magnesium concentration of not more than 0.01μg/mL. --- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0%; The lowest concentration of standard solution used (instead of "zero" standard solution) absorbance measured 10 times, and the standard deviation should not exceed the maximum concentration 0.5% of the mean absorbance of standard solution. --- Linear curve. The curve is divided into five sections according to concentration, absorbance difference between the absorbance difference between the highest and the lowest segment of the segment Ratio of not less than 0.85. Atomic absorption spectrometer operating conditions refer to Table 1. Table 1 instrument conditions Wavelength/nm lamp current/mA monochromator passband/nm observation height/mm flame type 285.2 5 0.2 8 stoichiometric flame ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of YS/T 226.7-2009_English be delivered?

Answer: Upon your order, we will start to translate YS/T 226.7-2009_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of YS/T 226.7-2009_English with my colleagues?

Answer: Yes. The purchased PDF of YS/T 226.7-2009_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version YS/T 226.7-2009?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version YS/T 226.7-2009 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.