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Methods for sampling and sample preparation of copper concentrates in bulk for import
| Obsolete |
SN/T 3357-2012
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Standard similar to SN/T 3357-2012 SN/T 5268 Basic data | Standard ID | SN/T 3357-2012 (SN/T3357-2012) | | Description (Translated English) | Methods for sampling and sample preparation of copper concentrates in bulk for import | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Word Count Estimation | 13,198 | | Quoted Standard | GB/T 2007.3-1987; GB/T 2007.4-2008; GB/T 14260-2010; GB/T 14263 | | Regulation (derived from) | National Quality Inspection (2012) 777; industry standard filing Notice 2013 No. 4 (No. 160 overall) | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the bulk of imports of copper concentrate sampling, sample preparation and moisture determination procedures and methods. This standard applies to bulk chemical composition of copper concentrates and water samples taken for measure | SN/T 3357-2012: Methods for sampling and sample preparation of copper concentrates in bulk for import
---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 sampling and sample preparation of copper concentrates in bulk for import
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Copper concentrate imports bulk sampling and sample preparation method
Issued on. 2012-12-12
2013-07-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Jiangsu Entry-Exit Inspection and Quarantine Bureau.
The main drafters of this standard. Hou Jin, Wang Hua, Wang Tong-sheng, Wu Yang, Lu Xiang, Douhuai Zhi.
Copper concentrate imports bulk sampling and sample preparation method
1 Scope
This standard specifies the bulk of imports of copper concentrate sampling procedures and methods of sample preparation and determination of moisture.
Chemical Constituents and Water This standard applies to bulk copper concentrates was measured using a sample taken, preparation and determination of moisture content.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. Undated document, the latest edition (including any amendments) applies to this document.
GB/T 2007.3-1987 bulk minerals sampling and sample preparation General evaluation of quality variation test method
GB/T 2007.4-2008 bulk minerals sampling and sample preparation General Experimental methods for checking the precision bias
GB/T 14260-2010 heavy nonferrous metals flotation concentrates in bulk sampling and sample preparation General
GB/T 14263 bulk flotation of copper concentrate sampling, sample preparation method
3 General Provisions
3.1 standard specifies different test batches sampled least parts of the total number of samples and the accuracy of measurement (βspm) and sampling precision (βs) according to GB/T 14263
Were shown in Table 1.
Table 1 inspection lot different parts of copper concentrate should take a minimum number of samples
Batch tests
Quality variation type
small Medium Large
σW < 1.0 1.0≤σW < 2.0 σW≥2.0
Sampling precision βs
Total precision βSPM
6,062,032 0.90 1.02
300,144,672 0.64 0.68
500,185,894 0.52 0.56
Note. If the quality of excessive volatility, less than the required precision when, according to n = 2σW
β () s
Calculate the number of increments.
The first method of sampling criteria listed in 3.2 and reduction of sub-process is no system error method.
3.3 standard specifies the percentage of copper in the copper concentrate as quality characteristics.
3.4 This standard specifies strict accordance with the method of sampling and sample preparation, and, if required for checking the precision test.
3.5 In case of conditions, sampling methods can be used outside of this standard. But it should be checked tested to confirm it has no system errors before
use.
3.6 composition sample should be kept for at least six months to prepare for verification.
3.7 Sampling and sample preparation used equipment, tools and containers containing samples should be kept clean and dry. Sheng sample container should be better seal to prevent sample
Deterioration.
3.8 Test Method for Evaluating quality fluctuations, test methods and checking the precision of sampling error checking system test method respectively GB/T 2007.3-
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