SN/T 0679-2014 English PDF

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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: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 0679-2014	729	Add to Cart	5 days	Methods of sampling and sample preparation of tin concentrates in bags for export	Valid
SN/T 0679-1997	999	Add to Cart	6 days	Methods of sampling and sample preparation of tin concentrates in bags for export	Obsolete

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YS/T 575.20   YS/T 575.22   SN/T 3510   SN/T 5687   SN/T 5412   SN/T 0681   

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Older Standard (superseded by this standard): SN/T 0679-1997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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