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GB/T 23273.2-2009 English PDF

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GB/T 23273.2-2009: Methods for chemical analysis of cobalt oxalate -- Part 2: Determination of lead content -- Electrothermal atomic absorption spectrometry
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 23273.2-2009	English	139	Add to Cart	3 days [Need to translate]	Methods for chemical analysis of cobalt oxalate -- Part 2: Determination of lead content -- Electrothermal atomic absorption spectrometry	Valid	GB/T 23273.2-2009

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Basic data

Standard ID	GB/T 23273.2-2009 (GB/T23273.2-2009)
Description (Translated English)	Methods for chemical analysis of cobalt oxalate -- Part 2: Determination of lead content -- Electrothermal atomic absorption spectrometry
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H13
Classification of International Standard	77.120.70
Word Count Estimation	6,659
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 method for measuring the amount of lead in cobalt oxalate. This section applies to the determination of lead content in cobalt oxalate. Measuring range: 0. 001% to 0. 01 %.

GB/T 23273.2-2009: Methods for chemical analysis of cobalt oxalate -- Part 2: Determination of lead content -- Electrothermal 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 cobalt oxalate Part 2. Determination of lead content Electrothermal atomic absorption spectrometry. ICS 77.120.70 H13 National Standards of People's Republic of China Methods for chemical analysis of cobalt oxalate Part 2. Determination of lead content Electrothermal atomic absorption 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 2. 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, Yang Yuanyuan, Lv Qingcheng, Lixi Kai, Lin Hsiu-ying, in force, Tangshu Fang, Dai Fengying, Liu Tianping. Methods for chemical analysis of cobalt oxalate Part 2. Determination of lead content Electrothermal atomic absorption spectrometry

1 Scope

GB/T 23273 provisions of this part of the determination of the amount of lead in cobalt oxalate. This section applies to the determination of lead content of cobalt oxalate. Measurement range. 0.001% to 0.01%.

2 Method summary

Sample decomposition with nitric acid, in dilute nitric acid medium, graphite furnace atomic absorption spectrometer at a wavelength of 283.3nm, Zeeman effect deduction back King, measuring the absorption peak area, according to the standard curve matching cobalt matrix calculations lead content.

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 nitrate (ρ1.42g/mL), pure class distinctions. 3.2 nitric acid (1 + 1). Nitrate 3.3 (2 + 3). 3.4 nitric acid (1 + 99). 3.5 cobalt matrix solution. Weigh 16.50g metal cobalt (cobalt content ≥99.98%, lead < 0.0005%) in 1000mL beaker Was added 40mL of nitric acid (3.2), cover sheet pan, on low heat until completely dissolved, oxides of nitrogen purge boiling, remove the cooled to room temperature, washed with water Flush table dish and cup wall, moved into 1000mL volumetric flask, constant volume of water. This solution 1mL containing 16.5mg cobalt. 3.6 lead standard stock solution. Weigh 0.2000g metallic lead (Pb mass fraction ≥99.95%), placed in 150mL beaker, add 20mL of nitric acid (3.3), cover sheet pan, a hot plate set at low temperature, is heated until complete dissolution, boiling rid of nitrogen oxides, was cooled to room temperature, Transferred to 200mL volumetric flask, add 20mL of nitric acid (3.2), constant volume of water. 1mL solution containing 1mg lead. 3.7 lead standard solution A. Pipette 10.00mL lead standard stock solution (3.6), in 1000mL flask, add 10mL of nitric acid (3.2), constant volume of water. This solution 1mL containing 10μg lead. 3.8 lead standard solution B. Pipette 10.00mL lead standard solution A, in 100mL flask, 10mL of nitric acid was added (3.2), water Volume, 1mL solution containing 1μg lead.

4 Instrument

Atomic absorption spectrometer with graphite furnace atomizer with Zeeman effect background subtraction function, autosampler, with the female lead in hollow Pole lamp. Under optimum working conditions for those who can reach the following indicators can be used. --- Sensitivity. basically the same test solution and measurement solution, characteristic mass of lead should be less than 50pg. --- 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 the 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 0.70.

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