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GB/T 37653-2019 PDF in English


GB/T 37653-2019 (GB/T37653-2019, GBT 37653-2019, GBT37653-2019)
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GB/T 37653-2019: PDF in English (GBT 37653-2019)

GB/T 37653-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.99
H 68
Platinum Ingots
铂锭
ISSUED ON: JUNE 04, 2019
IMPLEMENTED ON: MAY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Product Classification ... 4
4 Technical Requirements ... 4
5 Test Methods ... 6
6 Inspection Rules ... 6
7 Marking, Package, Transportation, Storage and Quality Certificate ... 8
8 Ordering Form (or Contract) Contents ... 9
Platinum Ingots
1 Scope
This Standard specifies product classification, technical requirements, test methods,
inspection rules, marking, package, transportation, storage, quality certificate, and
ordering form (or contract) contents of platinum ingots.
This Standard is applicable to the platinum ingots produced by the platinum-contained
raw materials.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 1419-2015 Sponge Platinum
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and
Judgement of Limiting Values
GB/T 18035 Precious Metals and its Alloys Designation System
YS/T 361 Determination of Trace Impurities in Purity Platinum by Atomic Emission
Spectrometric
3 Product Classification
According to the provisions of expression method specified in GB/T 18035, the
platinum ingot is divided into three designations as per the chemical composition of
platinum: IC-Pt99.99, IC-Pt99.95, and IC-Pt99.9.
4 Technical Requirements
4.1 Chemical composition
The chemical composition of platinum ingots shall conform to the provisions of Table
Figure 1 – Schematic Diagram of Sampling Points for Single Ingot
6.4.3 Use a 5mm~8mm drill bit to drill the platinum ingot; the drilling depth shall be no
less than 2/3 for the ingot thickness. After conducting the magnet treatment against
the drilled specimen, mix it evenly. Reduce it into 6 parts by quartering; each part is no
less than 2g.
6.4.4 In order to avoid the surface contamination of the sample, before analyzing the
sample, use 45°C~55°C hot hydrochloric acid (1+1) to immerse for 5min~10min. After
washing by water, rinse with alcohol or acetone twice and dry in an oven at
105°C~110°C.
6.5 Judgment of the inspection results
6.5.1 The actually-measured value of the impurity element shall be rounded off to 3
significant figures after the decimal points according to GB/T 8170; it shall be
expressed by the maximum limit value.
6.5.2 If the chemical composition is unqualified, such batch of products shall be judged
to be unqualified.
6.5.3 If the appearance quality is unqualified, then such block of platinum ingot shall
be judged to be unqualified.
6.4.4 When the weight or dimension are deviated, it shall not serve as the basis for
judging whether it is qualified or not.
7 Marking, Package, Transportation, Storage and
Quality Certificate
7.1 Marking
The surface of each block of platinum ingot shall be cast or printed with batch number,
weight, trademark, and designation, etc.
7.2 Package
Each block of platinum ingot shall be wrapped by clean paper or plastic film; then
packed into the wooden or plastic boxes.
7.3 Transportation and storage
The product shall not be damaged or contaminated during the transporting and storing
periods.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.