YS/T 955.2-2024 English PDF

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YS/T 955.2-2024: (Chemical analysis method of crude silver - Part 2: Determination of palladium content - Flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry)
Status: Valid

YS/T 955.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 955.2-2024	389	Add to Cart	4 days	(Chemical analysis method of crude silver - Part 2: Determination of palladium content - Flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry)	Valid
YS/T 955.2-2014	279	Add to Cart	3 days	Methods for chemical analysis of crude silver. Part 2: Determination of palladium content. Flame atomic absorption spectrometric method	Obsolete

Basic data

Standard ID: YS/T 955.2-2024 (YS/T955.2-2024)
Description (Translated English): (Chemical analysis method of crude silver - Part 2: Determination of palladium content - Flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry)
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H15
Classification of International Standard: 77.120.99
Word Count Estimation: 17,187
Date of Issue: 2024-10-24
Date of Implementation: 2025-05-01
Older Standard (superseded by this standard): YS/T 955.2-2014
Issuing agency(ies): Ministry of Industry and Information Technology
Summary: This standard specifies the method for determining the palladium content in crude silver. Method 1 is flame atomic absorption spectrometry and method 2 is inductively coupled plasma atomic emission spectrometry. This standard applies to the determination of palladium content in crude silver.

YS/T 955.2-2014: Methods for chemical analysis of crude silver. Part 2: Determination of palladium content. Flame atomic absorption spectrometric method

---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 crude silver Part 2. Determination of palladium content Flame atomic absorption spectrometric method ICS 77.120.99 H68 People's Republic of China Nonferrous Metals Industry Standard Silver crude chemical analysis methods - Part 2. Palladium content - Flame Atomic Absorption Spectrometry Methodsforchemicalanalysisofcrudesilver-Part 2. Determinationof Issued on. 2014-10-14 2015-04-01 implementation Ministry of Industry and Information Technology of the People's Republic of China released

Foreword

YS/T 955-2014 "crude chemical analysis of silver" is divided into two parts. --- Part 1. Determination of the amount of silver fire assay; --- Part 2. Flame atomic absorption spectrometry palladium content. This section YS/T Part 2 955. This section drafted in accordance with GB/T 1.1-2009 given rules. The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized. This section is responsible for drafting unit. Beijing General Research Institute of Mining and Metallurgy. Participated in the drafting of this section. Guangzhou Nonferrous Metal Research Institute, China Nonferrous Guilin Research Institute of Geology and Minerals Co. Ltd., Tongling Nonferrous rare Precious metals subsidiary, Hangzhou Fuchunjiang Smelting Co., Ltd., Fujian Zijin Mining and Metallurgy Testing Technology Co., Jiangxi Copper Company Limited Division. The main drafters of this section. Wanghao Ying, Dian Chen Geng, Feng Zhenhua, Chen Xiaolan, Wang Fang, Shi Yihua Zhou deposits, Gong Chang together, Zhang Liao, Summer pearl, Kang Guangli. Silver crude chemical analysis methods - Part 2. Palladium content - Flame Atomic Absorption Spectrometry

1 Scope

This method specifies the method for the determination of the amount of crude silver palladium. This method is applicable to the determination of the amount of crude palladium silver. Determination of the range of 100g/t ~ 4000g/t.

2 Method summary

Using fire assay cupellation lead pack, isolated crude silver in addition to noble metals impurities, palladium enriched in grains together. Co-grain decomposition by nitric acid, silver chloride Precipitation of silver, using air at 5% mixed acid medium - acetylene flame atomic absorption spectrometer at a wavelength of 247.6nm measured absorption of palladium Luminosity, to calculate the amount of palladium.

3 Reagents and materials

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 3.1 lead foil. pure lead (wPb≥99.99%) thickness of about 0.1mm. 3.2 hydrochloric acid (ρ = 1.19g/mL). 3.3 nitric acid (ρ = 1.42g/mL). 3.4 Glacial acetic acid (ρ = 1.42g/mL). 3.5 mixed acid. hydrochloric acid (3.2) and nitrate (3.3) in a volume ratio 3.1 mixture preparation. 3.6 lean acid (595). Take 5 parts of mixed acid (3.5) and 95 parts of water are mixed formulation. 3.7 nitric acid (17). 3.8 acetic acid (13). 3.9 palladium standard stock solution. Weigh 0.1000g of palladium (wPd≥99.99%) in 100mL beaker, add 20mL mixed acid (3.5), After heated to dissolve, add 5 drops of sodium chloride solution 200g L /, on the steam bath to nearly dry, add 20mL dissolved in hydrochloric acid and transferred to 100mL capacity Flask, cooled to room temperature, diluted with water to volume, and mix. This solution 1mL containing 1000μg palladium. 3.10 Palladium standard solution. Pipette 10.00mL palladium standard stock solution (3.9) in 100mL flask, add 10mL mixed acid (3.5), Dilute with water to volume, and mix. This solution 1mL containing 100μg palladium.

4 instruments and equipment

4.1 Analytical balance. dividing the value of 0.1mg. 4.2 Assaying furnace. The maximum heating temperature is not lower than 1000 ℃. 4.3 cupel machine. 4.4 magnesite cupel. top diameter of about 35mm, the bottom of the outer diameter of about 40mm, height 30cm, depth of about 17mm. Method. 85 parts and 15 parts of magnesia cement (mass ratio) and mix, add some water and stir evenly, pressing machine in the ash pan (4.3), and dried Two months later backup. 4.5 porcelain crucible. a volume of 30mL. ......

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