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SN/T 0679-2014: Methods of sampling and sample preparation of tin concentrates in bags for export
Status: Valid SN/T 0679: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 0679-2014 | English | 729 |
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Methods of sampling and sample preparation of tin concentrates in bags for export
| Valid |
SN/T 0679-2014
|
| SN/T 0679-1997 | English | 999 |
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Methods of sampling and sample preparation of tin concentrates in bags for export
| Obsolete |
SN/T 0679-1997
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PDF similar to SN/T 0679-2014
Basic data | Standard ID | SN/T 0679-2014 (SN/T0679-2014) | | Description (Translated English) | Methods of sampling and sample preparation of tin concentrates in bags for export | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | D42 | | Classification of International Standard | 73.060 | | Word Count Estimation | 28,298 | | Older Standard (superseded by this standard) | SN/T 0679-1997 | | Quoted Standard | GB/T 2007.1; GB/T 2007.3; GB/T 2007.4; GB/T 1819.2; GB/T 4414 | | Regulation (derived from) | AQSIQ notification issued in 2014 on the first batch of 230 industry-standard entry-exit inspection and quarantine | | Issuing agency(ies) | General Administration of Customs | | Summary | This Standard specifies the export of tin concentrate bag sampling and sample preparation methods. This Standard applies to the chemical composition and the water outlet bags with tin concentrates prepared to take samples and measured. | SN/T 0679-2014: Methods of sampling and sample preparation of tin concentrates in bags for export
---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 of sampling and sample preparation of tin concentrates in bags for export
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Instead of the SN/T 0679-1997
Export bags tin concentrates sampling and sample preparation method
Issued on. 2014-01-13
2014-08-01 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.
Instead of the standard SN/T 0679-1997 "exit bag of tin concentrates sampling and sample preparation method."
This standard SN/T 0679-1997 The main differences are as follows.
--- Increasing the normative references;
--- Increased by formula (3) and (B.21), formula (B.22), formula (B.23), formula (B.24), formula (B.25), formula (B.26 );
--- Amend Appendix B.2.4 flowcharts and descriptions;
--- Modify the formula in Appendix B.3.1.6 sample standard deviation.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Guangdong CIQ.
The main drafters of this standard. Zhangxian Chen, Wang Yong, Zhang Peng Jie, Peng Zhimin, Wang.
This standard replaces the previous release version of the case.
--- SN/T 0679-1997.
Export bags tin concentrates sampling and sample preparation method
1 Scope
This standard specifies the export of tin concentrate bag sampling and sample preparation methods.
This standard applies to the chemical composition and water outlet bags with tin concentrates prepared to take samples and determination.
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. For undated references, the latest edition (including any amendments) apply to this section.
GB/T 2007.1 bulk minerals sampling and sample preparation General manual sampling methods
GB/T 2007.3 minerals in bulk sampling, test methods for sample preparation quality fluctuation General Evaluation
GB/T 2007.4 bulk minerals for sampling and sample bias General, Experimental methods for checking the precision
GB/T 1819.2 Methods for chemical analysis of tin concentrates - Determination of tin content potassium iodate titration
GB/T 4414 Packaging tungsten concentrate sample preparation methods
3 Terms and Definitions
GB 4414, GB/T 2007.1 and GB/T 2007.3 and established the following terms and definitions apply to this document.
3.1
Basic batch basicbatch
Sieve mesh size of about 5%.
3.2
Variance variance
S2
Each square of measured values Xi and X mean the difference between the measured value and divided by the number of times n minus 1 of the difference, see equation (1).
S2 = Σ
(Xi-X) 2
n-1 =
nΣX2i- (ΣXi) 2
n (n-1)
(1)
3.3
Standard deviation standarddeviation
The square root of the variance.
3.4
The relative standard deviation relativestandarddeviation
RSD
Standard deviation divided by the average percentage, see formula (2).
RSD (%) =
× 100 (2)
3.5
Quality fluctuation standard deviation thestandarddeviationofthequalityfluctuations
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