GB/T 17418.2-2010 English PDF

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GB/T 17418.2-2010: Methods for analysis of noble metals in geochemical samples -- Part 2: Determination of platinum and rhodium content -- Preconcentration by thiourea-catalytic polarographic method
Status: Valid

GB/T 17418.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 17418.2-2010	189	Add to Cart	3 days	Methods for analysis of noble metals in geochemical samples -- Part 2: Determination of platinum and rhodium content -- Preconcentration by thiourea-catalytic polarographic method	Valid
GB/T 17418.2-1998	199	Add to Cart	2 days	Methods for analysis of noble metals in geochemical samples--Determination of platinum and rhodium content-Preconcentration by thiourea-Catalytic polarographic method	Obsolete

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Basic data

Standard ID: GB/T 17418.2-2010 (GB/T17418.2-2010)
Description (Translated English): Methods for analysis of noble metals in geochemical samples -- Part 2: Determination of platinum and rhodium content -- Preconcentration by thiourea-catalytic polarographic method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D46
Classification of International Standard: 73.060
Word Count Estimation: 8,813
Date of Issue: 2010-11-10
Date of Implementation: 2011-02-01
Older Standard (superseded by this standard): GB/T 17418.2-1998
Quoted Standard: GB/T 17418.1
Regulation (derived from): National Standard Approval Announcement 2010 No.8 (Total No.163)
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 geochemical samples Determination of platinum and rhodium. This section applies to the determination of platinum and rhodium containing platinum group elements in geological materials ultrabasic rocks. Measurement range, quality score, said: Platinum 2 ng/g ~ 5 ��g/g, rhodium 1 ng/g ~ 0. 5 ��g/g.

GB/T 17418.2-2010: Methods for analysis of noble metals in geochemical samples -- Part 2: Determination of platinum and rhodium content -- Preconcentration by thiourea-catalytic polarographic 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 analysis of noble metals in geochemical samples Part 2. Determination of platinum and rhodium content Preconcentration by thiourea-catalytic polarographic method. ICS 73.060 D46 National Standards of People's Republic of China Replacing GB/T 17418.2-1998 Analysis of noble metals in geochemical samples Part 2. platinum and rhodium content determination Enrichment thiourea - Catalytic polarographic Part 2. Determinationofplatinumandrhodiumcontent- Issued on. 2010-11-10 2011-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 17418 "analysis of noble metals in geochemical samples Method" is divided into seven parts. --- Part 1. General rules and regulations; --- Part 2. platinum and rhodium content - Determination of thiourea enrichment - catalytic polarography; --- Part 3. Determination of palladium content - Preconcentration by thiourea - Graphite furnace atomic absorption spectrophotometry; --- Part 4. Determination of the amount of iridium-enriched thiourea - Catalytic spectrophotometry; --- Part 5. Determination of the amount of ruthenium and osmium distillation - Catalytic spectrophotometry; --- Part 6. platinum, palladium and gold contents - fire assay enrichment - Emission Spectrometry; --- Part 7. Determination of nickel sulphide fire assay gold platinum group elements - Inductively Coupled Plasma Mass Spectrometry. This section GB/T 17418 Part 2. Catalytic polarographic determination - in this section instead of GB/T 17418.2-1998 "analysis of noble metals in geochemical samples enriched thiourea Platinum and rhodium content. " This section compared with the GB/T 17418.2-1998, the main changes are as follows. --- Increased warnings; --- Clearly indicate the mass fraction measurement range; --- Specification standard noun; --- Modify simplifies sample scale test solution dispensing scale content; --- Change some sequence of reagents and samples sulfide bake conditions; --- Change the sequence number of part reagent; --- Additional modifications to the contents of the result of the calculation. This section presents the People's Republic of China Ministry of Land Resources. This part of the National Standardization Technical Committee under the jurisdiction of Land and Resources. This section is responsible for drafting. National geology test center. This section is drafted. Zhejiang Institute of Geology and Mineral Resources. The main drafters of this section. Zheng deposit Jiang Hu Yongping, Zhang Mingjie. This part of the standard replaces the previous editions are. --- GB/T 17418.2-1998. Analysis of noble metals in geochemical samples Part 2. platinum and rhodium content determination Enrichment thiourea - Catalytic polarographic Warning --- Use this section shall be a person experiences regular laboratory work. This section does not point out all possible security asked question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

GB/T 17418 provisions of this part of the geochemical samples determination of platinum and rhodium. This section applies to the determination of platinum and rhodium-containing platinum group elements in geological materials ultrabasic rocks. Measurement range, mass fraction, said. Platinum 2ng/g ~ 5μg/g; Rh 1ng/g ~ 0.5μg/g.

2 Normative references

The following documents contain provisions which, through reference GB/T 17418 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 17418.1 precious metal analysis methods General rules and regulations in geochemical samples Principle 3 In addition to the sample by burning sulfur and organic matter, sodium peroxide decomposition, water extraction to sulfuric acid, hydrofluoric acid plus evaporation smoke except silicon. In concentrated sulfuric Acid medium, when heated to 230 ℃, thiourea and platinum, palladium, rhodium, iridium and other platinum group elements generated sulfide precipitation to separate with a large base metals. Plus nitric acid - sulfuric acid to dissolve the precipitate and the destruction and removal of the sulfur filter paper, and then lithium sulfate - sodium pyrosulfate melt the platinum group, platinum, rhodium and other elements into Sulfate complex. Platinum and rhodium in sulfuric acid - hexamine - - produce high sensitivity catalytic wave Hydrazine sulfate base solution of ammonium chloride. Peak potential of about platinum -1.00V (Silver electrode). Platinum in the 0.2ng/mL ~ 2ng/mL range with its derivative peak height is linear. Rhodium peak potential of about It is -1.10V (silver electrode). Rhodium in 0.025ng/mL ~ 0.25ng/mL range, the catalytic current rhodium concentration is not entirely to Linear relationship, use the curve to calculate the concentration. Geochemical samples in the platinum content is generally not high, platinum, rhodium can be continuously measured. Under assay conditions, 10mL volume, less than 100ng platinum rhodium does not interfere with the determination, but a lot of platinum should be separated. 10mgPb, Co, Bi, Mo, 2mgCu, Ni, Cr, 200μgZn, 100μg As, Tl, 10μgAu, Se, Pd, 5μgIr, Os, 2μgRu, 1μgTe, 0.1μgRh not interfere with the determination of platinum. NO3- serious interference should Rush to make.

4 Reagents

4.1 hydrochloride (ρ1.19g/mL). Nitrate 4.2 (ρ1.42g/mL). 4.3 sulfate (ρ1.84g/mL). 4.4 sulfuric acid (11), warning --- improper dilution risk prone. 4.5 hydrofluoric acid (ρ1.15g/mL), warning of toxic and corrosive hydrofluoric acid ---, the operation should wear gloves to prevent skin contact. 4.6 phosphoric acid (ρ1.69g/mL). ......

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