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GB/T 23273.3-2009 English PDF

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GB/T 23273.3-2009: Methods for chemical analysis of cobalt oxalate -- Part 3: Determination of arsenic content -- Hydride generation-atomic fluorescence spectrometry
Status: Valid
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GB/T 23273.3-2009English139 Add to Cart 3 days [Need to translate] Methods for chemical analysis of cobalt oxalate -- Part 3: Determination of arsenic content -- Hydride generation-atomic fluorescence spectrometry Valid GB/T 23273.3-2009

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Basic data

Standard ID GB/T 23273.3-2009 (GB/T23273.3-2009)
Description (Translated English) Methods for chemical analysis of cobalt oxalate -- Part 3: Determination of arsenic content -- Hydride generation-atomic fluorescence spectrometry
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H13
Classification of International Standard 77.120.70
Word Count Estimation 6,698
Date of Issue 2009-01-05
Date of Implementation 2009-11-01
Regulation (derived from) National Standard Approval Announcement 2009 No.2 (Total No.142)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the determination of the amount of arsenic, cobalt oxalate. This section applies to the determination of arsenic content of cobalt oxalate. Measuring range: 0. 000 1% to 0. 004 %.

GB/T 23273.3-2009: Methods for chemical analysis of cobalt oxalate -- Part 3: Determination of arsenic content -- Hydride generation-atomic fluorescence spectrometry


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Methods for chemical analysis of cobalt oxatate Part 3. Determination of arsenic content Hydride generation-atomic fluorescence spectrometry ICS 77.120.70 H13 National Standards of People's Republic of China Methods for chemical analysis of cobalt oxalate Part 3. Determination of arsenic content Hydride Generation - Atomic Fluorescence Spectrometry Posted 2009-01-05 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 23273 "Methods for chemical analysis of cobalt oxalate" a total of eight sections. --- Part 1. Determination of cobalt content by potentiometric titration --- Part 2. Determination of lead content of electrothermal atomic absorption spectrometry --- Part 3. Determination of arsenic content by hydride generation - atomic fluorescence spectrometry --- Part 4. Determination of silicon content - Molybdenum blue spectrophotometric method --- Part 5. calcium, magnesium, sodium content - Flame Atomic Absorption Spectrometry --- Part 6. Determination of the amount of chloride ion selective electrode method --- Part 7. Determination of sulfate ion content of combustion - iodometric method --- Part 8. nickel, copper, iron, zinc, aluminum, manganese, lead, arsenic, calcium, magnesium, sodium content - Inductively coupled plasma atomic emission spectrometry This is Part 3. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This section is responsible for drafting Jinchuan Group Limited. This in part by the Beijing Research Institute, Guangzhou Nonferrous Metal Research Institute of Mining and Metallurgy in the drafting. The main drafters of this section. Zhang Zhi hair, dry Yong, Zhang Wen, Qin Xia, Huang Guihua, Lin Hsiu-ying, Tangshu Fang, Yu Li, Liu Tianping, Dai Fengying?. Methods for chemical analysis of cobalt oxalate Part 3. Determination of arsenic content Hydride Generation - Atomic Fluorescence Spectrometry

1 Scope

GB/T 23273 provisions of this part of the determination of the amount of arsenic, cobalt oxalate. This section applies to the determination of arsenic content of cobalt oxalate. Measurement range. 0.0001% to 0.004%.

2 Method summary

Sample decomposition with hydrochloric acid, hydrochloric acid medium with thiourea - ascorbic acid pre-reduction, arsenic hydride generator is potassium borohydride Reduction of hydride with argon gas was introduced into the atomizer, the fluorescence intensity measured on the atomic fluorescence spectrometer, by matching cobalt matrix standard song Line method to calculate the content of arsenic.

3 Reagents

Analysis of water are two of water or equivalent purity. After dilute nitric acid used in the experiment containers are treated with hot, clean water. 3.1 hydrochloride (ρ1.19g/mL). 3.2 HCl (1 + 1). Hydrochloride 3.3 (1 + 3). Nitrate 3.4 (ρ1.42g/mL). 3.5 nitric acid (1 + 1). Thiourea 3.6 - ascorbic acid solution (100g/L). Weigh 10.0g of thiourea, was added 80mL of water was heated to about dissolved, cooled 10.0g ascorbic acid, dissolved diluted to 100mL, and mix using now. 3.7 solution of potassium borohydride (20g/L). Weigh 2.0g of potassium borohydride is added 100mL sodium hydroxide solution (5g/L) were dissolved, and mix. use When existing service. 3.8 cobalt matrix solution (cobalt-containing 16g/L). Weigh 1.6000g metal cobalt (cobalt content ≥99.98%, wherein the mass fraction of arsenic < 0.0001%), was added 20mL of nitric acid (3.5) were dissolved, coolish, was added 10mL of hydrochloric acid (3.1) was dissolved to a small volume, and cooled to remove At room temperature and transferred to 100mL volumetric flask, constant volume of water. 3.9 arsenic standard stock solution. Weigh 0.1320g trioxide (arsenic trioxide mass fraction ≥99.9%, sulfuric acid in a dry beforehand Is dried to constant weight) in 150mL beaker, 5mL sodium hydroxide solution (200g/L), cover the dish table, low dissolved, add 5mL Water, 2 drops of phenolphthalein ethanol solution (1g/L), washed with hydrochloric acid (3.2) to the red and then disappear just excess 2mL, moved 1000mL volumetric flask The constant volume of water. This solution 1mL containing 100μg arsenic. 3.10 arsenic standard solution. Pipette 10.00mL arsenic standard stock solution (3.9) in 1000mL volumetric flask, was added 20mL of hydrochloric acid (3.2), constant volume of water. This solution 1mL containing 1μg of arsenic. 3.11 argon (Ar≥99.99%).

4 Instrument

Atomic fluorescence spectrometer, with a high-intensity arsenic hollow cathode lamp. Under optimum working conditions for those who reach the following indicators can be used. --- Detection limit. less than 0.5ng/mL.

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