GB/T 19198-2008 English PDF

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GB/T 19198-2008: Testing method for thermo-electromotive force of precious metals and their alloys pair up with platinum or copper
Status: Valid

GB/T 19198: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 19198-2008	209	Add to Cart	3 days	Testing method for thermo-electromotive force of precious metals and their alloys pair up with platinum or copper	Valid
GB/T 19198-2003	319	Add to Cart	3 days	Precious metals and their alloys of platinum thermal electromotive force test methods	Obsolete

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GB/T 17473.2   GB/T 17473.1   GB/T 17473.5   GB/T 45329   GB/T 26288   GB/T 45108   

Basic data

Standard ID: GB/T 19198-2008 (GB/T19198-2008)
Description (Translated English): Testing method for thermo-electromotive force of precious metals and their alloys pair up with platinum or copper
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H68
Classification of International Standard: 77.120.99
Word Count Estimation: 9,930
Date of Issue: 2008-03-31
Date of Implementation: 2008-09-01
Older Standard (superseded by this standard): GB/T 19198-2003
Quoted Standard: GB/T 5977; GB/T 8170; JJF 1059
Regulation (derived from): National Standard Approval Announcement 2008 No.5 (Total No.118)
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 precious metals and their alloys in the temperature range of 0��C ~ 300��C for platinum thermal emf measurement method. Provisions of the precious metals and their alloys in the temperature range of 0��C ~ 200��C copper thermal EMF measurement method. This standard applies to precious metals and their alloys measurements in the temperature range of 0��C ~ 300��C for platinum thermal electric forces, apply to precious metals and their alloys measurements in the temperature range of 0��C ~ 200��C thermal EMF of copper. Other types of metals and alloys of platinum or copper thermal electromotive force measurements may also refer to proceed.

GB/T 19198-2008: Testing method for thermo-electromotive force of precious metals and their alloys pair up with platinum or copper

---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.
Testing method for thermo-electromotive force of precious metals and their alloys pair up with platinum or copper ICS 77.120.99 H68 National Standards of People's Republic of China Replacing GB/T 19198-2003 Precious metals and their alloys of platinum, The method for measuring the thermal emf of copper Posted 2008-03-31 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 19198-2003 "Test Method for precious metals and their alloys platinum thermal electromotive force." This standard compared with GB/T 19198-2003, the main changes are as follows. --- The standard name was changed to "precious metals and their alloys of platinum, copper thermal EMF measurement method"; --- Increased precious metals and their alloys measured in the temperature range of 0 ℃ ~ 200 ℃ copper thermal electromotive force; --- Increasing the comparison electrode copper purity, size; --- Increase the comparison electrode wire cleaning, annealing treatment; --- Compared with the original standards were editorial changes in the text as well as a schematic aspect. Appendix A of this standard is the data appendix. The standard proposed by China Nonferrous Metals Industry Association. This standard Nonferrous Metals by the National Standardization Technical Committee. This standard by your research Platinum Ltd. is responsible for drafting. The main drafters of this standard. Huang Shaohua, Wu Qingwei, Wu Fei, Fu Gang. This standard replaces the standards previously issued as follows. --- GB/T 19198-2003. Precious metals and their alloys of platinum, The method for measuring the thermal emf of copper

1 Scope

This standard specifies the precious metals and their alloys in the temperature range of 0 ℃ ~ 300 ℃ measurement methods platinum thermal electromotive force, the provisions of the expensive Metals and their alloys in the temperature range of 0 ℃ ~ 200 ℃ copper thermal EMF measurement method. This standard applies to measuring precious metals and their alloys in the temperature range of 0 ℃ ~ 300 ℃ thermal EMF of platinum; for precious metals Its alloys measured in the temperature range of 0 ℃ ~ 200 ℃ copper thermal electromotive force. Other types of metals and their alloys or platinum Measurement of the thermal emf of copper may also be referring to.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 5977 resistance thermometers with platinum wire GB/T 8170 digital rounding rules JJF1059 Evaluation and Expression of Uncertainty in Measurement

3 PRINCIPLE OF THE METHOD

(1) (2) Where.

4 Materials

4.1 standard electrode Platinum wire, diameter 0.2mm ~ 1mm, a length of 800mm ~ 1000mm. Flag purity amount W (100 ℃) ≥1.3920, W (100 ℃) measured according to GB/T 5977 carried out. Pure platinum wire first with 30% hydrochloric acid solution boiling 15min, after removing the cook with distilled water Boil several times, until the solution was neutral. The clean platinum wire suspended power-annealing device for annealing, platinum wire surface temperature annealing Shall be not less than 1100 ℃, no less than 2h. 4.2 copper Diameter 0.2mm ~ 1mm, a length of 800mm ~ 1000mm. Copper purity not less than 99.99%. First with copper wire ......

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