GB/T 27679-2011 English PDF

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GB/T 27679-2011: Copper, lead, zinc and nickel concentrates -- Experimental methods for checking the precision of sampling
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 27679-2011	334	Add to Cart	3 days	Copper, lead, zinc and nickel concentrates -- Experimental methods for checking the precision of sampling	Valid

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Basic data

Standard ID: GB/T 27679-2011 (GB/T27679-2011)
Description (Translated English): Copper, lead, zinc and nickel concentrates -- Experimental methods for checking the precision of sampling
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D42
Classification of International Standard: 77.120.01
Word Count Estimation: 17,121
Date of Issue: 2011-12-30
Date of Implementation: 2012-10-01
Quoted Standard: ISO 12743
Adopted Standard: ISO 12744-2006 (E), IDT
Regulation (derived from): Announcement of Newly Approved National Standards No. 22 of 2011
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 copper, lead, zinc and nickel concentrates sampling, sample handling, chemical analysis, physical testing and moisture inspection methods such as precision, according to IS0 12743 requirements expressed in standard deviation precision.

GB/T 27679-2011: Copper, lead, zinc and nickel concentrates -- Experimental methods for checking the precision of sampling

---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.
Copper, lead, zinc and nickel concentrates. Experimental methods for checking the precision of sampling ICS 77.120.01 D42 National Standards of People's Republic of China Copper, lead, zinc and nickel concentrates Experimental methods for checking the precision of sampling Copper, lead, zincandnickel (ISO 12744.2006 (E), IDT) Issued on. 2011-12-30 2012-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is in accordance with GB/T 1.1-2009 given rules drafted. This standard uses the translation method identical with ISO 12744.2006 (E) "Copper, lead, zinc and nickel concentrates --- check sampling precision experiments method". This standard and ISO 12744. compared to 2006 (E), mainly to do the following editorial changes. --- With a decimal point instead of a comma as the decimal point in the international standard ",". ","; --- Use the "standard" instead of "this International Standard"; --- According to Chinese customary change the standard name; --- Remove the cover of the international standards, directory, foreword and introduction. This standard by the national non-ferrous metals Standardization Technical Committee (SAC/TC243) centralized. This standard is drafted by. Nantong CIQ, Jiyuan City, Wei Xin Industrial Co., a limited liability company. The main drafters of this standard. Hou Jin, Douhuai Zhi, Lu Xiang, Lin Wei Lian Cai will. Copper, lead, zinc and nickel concentrates Experimental methods for checking the precision of sampling Warning --- material covered by this standard, operations, and equipment may be dangerous. This standard is applicable prior to use are responsible for establishing appropriate Should the health and safety conditions and to determine the possible specification limits.

1 Scope

This standard specifies the copper, lead, zinc and nickel concentrate sampling, sample preparation, chemical analysis, physical testing and measurement of moisture and other precision inspection The method, according to the ISO 12743 regulations, in the form of standard deviation represents precision.

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) applies to this document. ISO 12743 Copper, lead, zinc and nickel concentrates - Sampling methods of metal and moisture content determination (Copper, lead, zincandnickel concentrates-Samplingproceduresfordeterminationofmetalandmoisturecontent)

3 General

3.1 Overview If the samples do parallel processing and measurement can determine sample handling and analysis precision, should take part in parallel samples from each batch to determine the Given the first stage sampling precision. 3.2 Batches To make accurate, we should concentrate more than the same kind of 20 batches of samples taken parallel parts, the size of the batch to batch number should be consistent with the requirements. 3.3 Sample (first stage sample) number and the number of samples The minimum number of samples should check deputy twice the precision of a predetermined number of ISO 12743. Therefore, if n is the number of samples daily and only A batch of samples, the minimum number of subsamples should be 2n, then composed of two increments. Or, if accuracy checks are part of routine sampling, Preferably n parts subsamples consisting of 2 parts increments, each increment comprising n/2 copies of a sample. Sampling precision obtained should be divided by 2 to get the parts comprising n Subsamples sample batch sampling precision. 3.4 Sample Preparation and Analysis Sample processing performed by the ISO 12743 regulations. Sample analysis should be based on relevant international standards for performing said method. 3.5 precision frequency of inspections It should continue at regular intervals after the completion of a check-precision accuracy check. When the device is changed, the precision should also be the subject check. Because a lot of work involved in checking precision, accuracy should check as part of routine sampling and analytical work to do. ......

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