GB/T 4325.1-2013 English PDF

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GB/T 4325.1-2013: Methods for chemical analysis of molybdenum -- Part 1: Determination of lead content -- Graphite furnace atomic absorption spectrometry
Status: Valid

GB/T 4325.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4325.1-2013	169	Add to Cart	3 days	Methods for chemical analysis of molybdenum -- Part 1: Determination of lead content -- Graphite furnace atomic absorption spectrometry	Valid
GB/T 4325.1-1984	199	Add to Cart	2 days	Methods for chemical analysis of molybdenum--The square wave polarographic method for the successive determination of lead and cadmium content	Obsolete

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Basic data

Standard ID: GB/T 4325.1-2013 (GB/T4325.1-2013)
Description (Translated English): Methods for chemical analysis of molybdenum -- Part 1: Determination of lead content -- Graphite furnace atomic absorption spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H63
Classification of International Standard: 77.120.99
Word Count Estimation: 7,719
Older Standard (superseded by this standard): GB/T 4325.1-1984 Partial
Regulation (derived from): National Standards Bulletin 2013 No. 6
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 amount of molybdenum in the determination of lead. This section applies to molybdenum trioxide, ammonium, aluminum, molybdenum lead content. Measuring range: 0. 0001% to 0. 0100 %

GB/T 4325.1-2013: Methods for chemical analysis of molybdenum -- Part 1: Determination of lead content -- Graphite furnace 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 molybdenum Part 1. Determination of lead content Graphite furnace atomic absorption spectrometry ICS 77.120.99 H63 National Standards of People's Republic of China Replacing GB/T 4325.1-1984 Chemical analysis of molybdenum Part 1. Determination of lead content Graphite Furnace Atomic Absorption Spectrometry Part 1. Determinationofleadcontent- Issued on. 2013-05-09 2014-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 4325 "chemical analysis of molybdenum" is divided into 26 parts. --- Part 1. Determination of lead content - Graphite furnace atomic absorption spectrometry; --- Part 2. Determination of cadmium content by flame atomic absorption spectrometry; --- Part 3. Determination of bismuth content - atomic fluorescence spectrometry; --- Part 4. Determination of tin content by atomic fluorescence spectrometry; --- Part 5. Determination of antimony content - Atomic Fluorescence Spectrometry; --- Part 6. Determination of arsenic content by atomic fluorescence spectrometry; --- Part 7. Determination of the amount of iron phenanthroline spectrophotometry and inductively coupled plasma atomic emission spectrometry; --- Part 8. Determination of cobalt content of cobalt reagents spectrophotometry and flame atomic absorption spectrometry; --- Part 9. Determination of the amount of nickel dimethylglyoxime spectrophotometric method and the flame atomic absorption spectrometry; --- Part 10. Determination of copper content - Flame atomic absorption spectrometry; --- Part 11. Determination of aluminum content of chromium azure S spectrophotometry and inductively coupled plasma atomic emission spectrometry; --- Part 12. silicon content - Inductively coupled plasma atomic emission spectrometry; --- Part 13. Determination of calcium content by flame atomic absorption spectrometry; --- Part 14. Determination of magnesium content - Flame atomic absorption spectrometry; --- Part 15. Determination of sodium content by flame atomic absorption spectrometry; --- Part 16. Determination of potassium content by flame atomic absorption spectrometry; --- Part 17. Determination of titanium content of two methane antipyrine spectrophotometry and inductively coupled plasma atomic emission spectrometry; --- Part 18. Determination of the amount of vanadium tantalum reagent spectrophotometry and inductively coupled plasma atomic emission spectrometry; --- Part 19. Determination of chromium content of diphenyl carbon acid dihydrazide spectrophotometry; --- Part 20. Determination of manganese content by flame atomic absorption spectrometry; --- Part 21. Determination of the amount of carbon and sulfur content of the high-frequency combustion infrared absorption method; --- Part 22. Determination of phosphorus content - Molybdenum blue spectrophotometric method; --- Part 23. Determination of the oxygen and nitrogen inert gas fusion infrared absorption method - thermal conductivity method; --- Part 24. Determination of tungsten content - Inductively coupled plasma atomic emission spectrometry; --- Part 25. Determination of the amount of hydrogen in the inert gas fusion infrared absorption method/thermal conductivity method; --- Part 26. aluminum, magnesium, calcium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, arsenic, cadmium, tin, antimony, tungsten, lead and bismuth content - Inductively coupled Co-Plasma Mass Spectrometry. This section GB/T 14325 Part of. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 4325.1-1984 "chemical analysis of molybdenum square wave polarography determination of lead and cadmium content," Measurement of the amount of lead set. This section compared with the GB/T 4325.1-1984, the main technical changes are as follows. --- Will be changed to a square wave polarography graphite furnace - atomic absorption spectrometry; Measurement range adjustment --- 0.0001% 0.0100%; --- Increased repeatability terms; --- Increasing the test report clause. The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized. This section is drafted. Jinduicheng Molybdenum Industry Co., Ltd., Northwest Nonferrous Metal Research Institute. The main drafters of this section. Xie Mingming, Wang Guoliang, Li Qiao Hong, He Xin, Yang Pingping, Sunbao Lian, Zhangjiang Feng. This part of the standard replaces the previous editions are. --- GB/T 4325.1-1984. Chemical analysis of molybdenum Part 1. Determination of lead content Graphite Furnace Atomic Absorption Spectrometry

1 Scope

GB/T 4325 This section specifies the method for determination of molybdenum in lead content. This section applies to molybdenum trioxide, ammonium molybdate, molybdenum powder, molybdenum bar of lead contents. Measurement range. 0.0001% to 0.0100%.

2 Method summary

Sample was dissolved hydrogen peroxide. In nitric acid medium with argon as a protective gas, graphite furnace atomic absorption spectrometer wavelength 283.3nm Lead measured absorbance.

3 Reagents

Unless otherwise indicated, this part of water as a secondary water or water for more than two. The reagents were used pure class distinctions. 3.1 paramolybdate. mass fraction ≥99.99%. 3.2 molybdenum substrate. (wPb≤0.000005%). 3.3 nitric acid (ρ = 1.42g/mL). 3.4 Hydrogen peroxide (ρ = 1.10g/mL). 3.5 nitric acid (11). 3.6 lead standard stock solution. Weigh 0.1000g metallic lead (wPb≥99.99%) in 250mL beaker, covered table dish, add 30mL of nitric acid (3.5), dissolved by heating, cooling, transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution containing 1mL 100μg lead. 3.7 Lead standard solution. Pipette 1.00mL lead standard stock solution (3.6) in 100mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 1μg lead. 3.8 Argon. volume fraction of greater than 99.99%.

4 Instrument

Graphite furnace atomic absorption spectrometer, with a lead hollow cathode lamp. Under optimum working conditions for those who can reach the following indicators can be used. --- Characteristic concentration. the test solution and measurement matrix consistent solution, characteristic concentration of lead should be less than 1.6ng/mL; --- Precision. measure up to 10 times the standard solution, the absorbance of the standard deviation should not exceed 0.8% of the mean absorbance; the lowest Concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum concentration standard The average absorbance of standard solution of 0.4%; --- Linear curve. the curve according to concentration, divided into five sections, the difference between the absorbance of the absorbance difference between the highest and the lowest segment segment Ratio of not less than 0.7. ......

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