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GB/T 6730.78-2019 English PDF

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GB/T 6730.78-2019: Iron ores - Determination of cadmium content - Graphite furnace atomic absorption spectrophotometric method
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 6730.78-2019	English	279	Add to Cart	3 days [Need to translate]	Iron ores - Determination of cadmium content - Graphite furnace atomic absorption spectrophotometric method	Valid	GB/T 6730.78-2019

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Basic data

Standard ID	GB/T 6730.78-2019 (GB/T6730.78-2019)
Description (Translated English)	Iron ores - Determination of cadmium content - Graphite furnace atomic absorption spectrophotometric method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	D31
Classification of International Standard	73.060.10
Word Count Estimation	14,137
Date of Issue	2019-08-30
Date of Implementation	2020-07-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 6730.78-2019: Iron ores - Determination of cadmium content - Graphite furnace atomic absorption spectrophotometric method

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Iron ores - Determination of cadmium content - Graphite furnace atomic absorption spectrophotometric method ICS 73.060.10 D31 National Standards of People's Republic of China Determination of cadmium content in iron ore Graphite furnace atomic absorption spectrometry Published on.2019-08-30 2020-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

GB/T 6730 "Iron Ore" is divided into dozens of parts. This part is the 78th part of GB/T 6730. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part was proposed by the China Iron and Steel Association. This part is under the jurisdiction of the National Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC317). This section drafted by. Tianjin Entry-Exit Inspection and Quarantine Bureau of Mining Metal Materials Testing Center, Metallurgical Industry Information Standards Institute, China Inspection and Quarantine Science Research Institute, China Inspection National Research Institute (Beijing) Technology Co., Ltd., Tsinghua University. The main drafters of this section. Gu Songhai, Su Mingyue, Guo Fen, Wu Qianqian, Li Quanbin, Chen Zibin, Zou Mingqiang, Qi Xiaohua, Wang Hong, Wang Yunyun, Hu Dexin, Yang Jinkun, Zhao Wei, Wang Sheng, Zhou Chengyu, Ye Jianfeng. Determination of cadmium content in iron ore Graphite furnace atomic absorption spectrometry Cautions - Personnel using this section should have hands-on experience in formal laboratory work. This section does not point out all possible security questions. question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the relevant national laws and regulations.

1 Scope

This part of GB/T 6730 specifies the determination of cadmium in iron ore by graphite furnace atomic absorption spectrometry. This section applies to natural iron ore, iron concentrates and lump ore, including the determination of cadmium content in sintered products. Measuring range (mass score). 0.0001%~0.010%.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6379.1 Accuracy of measurement methods and results (accuracy and precision) Part 1. General and definition GB/T 6379.2 Accuracy of measurement methods and results (accuracy and precision) Part 2. Determination of standard method of measurement Basic method of sex and reproducibility GB/T 6682 Analytical laboratory water specifications and test methods GB/T 6730.1 Preparation of pre-dried samples for iron ore analysis GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values GB/T 10322.1 Iron ore sampling and sample preparation method GB/T 12806 laboratory glass instrument single standard line volumetric flask GB/T 12807 laboratory glass instrument indexing pipette GB/T 12808 laboratory glass instrument single standard line pipette GB/T 15337 General rules for atomic absorption spectrometry

3 Principle

Digest the sample with hydrochloric acid or nitric acid in a closed microwave digestion apparatus, or use hydrochloric acid, nitric acid, hydrofluoric acid or perchloric acid under normal conditions. The sample was removed. Dilute the test solution according to the concentration of cadmium in the test solution. Heating atomization in graphite furnace with ammonium dihydrogen phosphate solution as matrix modifier Cadmium was measured for its absorbance on an atomic absorption spectrometer and the cadmium content was calculated according to the standard curve method.

4 reagents and materials

In the analysis, unless otherwise stated, only approved high-grade pure reagents and secondary water in accordance with GB/T 6682 or equivalent in purity are used. Water. 4.1 Hydrochloric acid, ρ≈ 1.19g/mL.

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