GB/T 6678-2003 PDF English
US$135.00 · In stock · Download in 9 secondsGB/T 6678-2003: General principles for sampling chemical products Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 6678: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 6678-2003 | English | 135 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
General principles for sampling chemical products
| Valid |
| GB/T 6678-1986 | English | 639 |
Add to Cart
|
5 days
|
General principles for sampling chemical products
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 6678-2003
GB/T 6678-2003: General principles for sampling chemical products---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT6678-2003
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.01
G 04
Replacing GB/T 6678-1986
General Principles for Sampling Chemical Products
Issued on. OCTOBER 11, 2003
Implemented on. MAY 01, 2004
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 Purposes of Sampling... 4
5 Basic Principle of Sampling... 6
6 Sampling Plan... 6
7 Sampling Technology... 7
8 Sampling Safety... 11
9 Sampling Records and Sampling Report... 11
10 Sample Container and Storage... 12
11 Measuring One-Time Sampling Inspection... 12
Appendix A (Informative) Relevant Examples of this Standard... 19
Appendix B (Normative) Relevant Schedules of this Standard... 24
Foreword
There is no difference between this standard and the previous version of standard in technical
content. According to the requirements of GB/T1.1-2000, only some editorial changes have
been made.
This Standard replaces GB/T 6678-1986 General Principles for Sampling of Chemical
Products from the date of implementation.
The Appendix A of this Standard is informative; while Appendix B is normative.
This Standard compensates with GB/T 6679-2003 General Rules for Sampling Solid Chemical
Products, GB/T 6680-2003 General Rules for Sampling Liquid Chemical Products, and GB/T
6681-2003 General Rules for Sampling Gaseous Chemical Products.
This Standard was proposed by China Petroleum and Chemical Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Chemistry (SAC/TC 63).
This Standard was entrusted to National Technical Committee for Standardization of Chemistry
for interpretation.
Drafting organization of this Standard. Zhonghua Chemical Industry Institute of
Standardization.
Participating drafting organizations of this Standard. Changzhou Entry-Exit Inspection and
Quarantine Bureau; Nantong Entry-Exit Inspection and Quarantine Bureau; and Tianjin Yuhua
Trade Corporation.
Chief drafting staffs of this Standard. Chen Liping, Mei Jian, Zhou Wei, Wang Xiaobing, Zhou
Feizhou, Wang Hua, and Wang Rong.
This Standard was first-time published in August of 1986.
General Principles for Sampling Chemical Products
1 Scope
This Standard specifies the terms and definitions of chemical product sampling, sampling
purposes, basic principles of sampling, sampling plans, sampling techniques, sampling safety,
sampling records and sampling reports, sample containers and storage, and metering one-time
sampling inspection.
This Standard applies to the sampling of chemical products.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard; however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced document
applies.
GB/T 3723 Sampling of Chemical Products for Industrial Use - Safety in Sampling (GB/T
3723-1999, idt ISO 3165.1976)
GB/T 4650 Chemical Products for Industrial Use – Sampling – Vocabulary (GB/T 4650-
1998, idt ISO 6206.1979)
GB/T 6679 General Rules for Sampling Solid Chemical Products
3 Terms and Definitions
For the purposes of this Standard, the terms and definitions given in GB/T 4650 apply.
4 Purposes of Sampling
The basic purpose of sampling is to obtain a representative sample from the overall material to
be tested, and to obtain data within the allowable error through the detection of the sample, so
as to obtain the average value and variability of one or some characteristics of the inspected
material.
4.1 Purposes in technical aspect
4.2 Purposes in business aspect
4.3 Purposes in law aspect
4.3.1 To check whether the material meets the statutory requirements;
4.3.2 To check whether the leakage of hazardous substances in the production process exceeds
the allowable limit;
4.4 Purposes in safety aspect
4.4.1 To determine whether the material is safe or dangerous;
5 Basic Principle of Sampling
The basic principle of sampling is to make the collected samples fully representative.
When the cost of sampling (such as material cost, operation cost, etc.) is high, the sampling
error and cost can be properly considered when designing the sampling plan, but the
requirements for sampling error shall be met.
6 Sampling Plan
6.1 Factors influencing the sampling plan
6.1.1 The nature, physical state and range of the overall material to be collected. The range can
be a certain delivery batch agreed by the purchaser and supplier, or a certain production batch
produced intermittently; and in the case of continuous production, it can be the material
produced within a certain time interval;
6.1.6 Precision of the detection method;
6.1.7 Value of the material;
6.1.8 Possibility to simplify sampling operations.
6.2 Basic content of sampling plan
6.2.1 Determine the range of the overall material;
6.2.2 Determine the sampling unit and the secondary sampling unit;
6.2.5 Specify the processing method of the sample;
6.2.6 Specify sampling safety measures.
7 Sampling Technology
7.1 Sampling error
7.1.1 Sampling random error
Sampling random error is the deviation caused by some uncontrollable accidental factors in the
sampling process, which cannot be avoided. Increasing the number of sampling repetitions can
reduce such error.
7.2 Variability types of material characteristic values
Materials can be divided into two types according to the variability of characteristic values,
namely uniform materials and non-uniform materials. Non-uniform materials can be
subdivided as follows.
7.3 Variability of overall material characteristic values and inference of their types
The variability of the overall material characteristic values and their types are the basis for
designing a sampling plan. They exist objectively, but it is expensive and difficult to operate to
estimate them through the detected data. Therefore, the actual measurement is generally not
carried out when designing the sampling plan, but inferences and assumptions are made based
on experience and the material information that has been mastered.
7.4 Sampling of uniform material
7.5 Sampling of non-uniform materials
For the sampling of non-uniform materials, in addition to paying attention to the same two
points as uniform materials, random sampling is generally adopted.
7.6 The number of samples and the quantity of samples
Under the premise of meeting the needs, the minimum number of samples and the minimum
quantity of samples that can give the required information are the optimal number of samples
and the optimal quantity of samples.
7.6.1 The number of samples
For general chemical products, multi-unit materials can be used for processing. Its unit
boundaries may be tangible, such as a container; or imagined, such as a specific time interval
for flowing material.
7.6.2 The quantity of samples
On the premise of meeting the needs, the quantity of samples shall at least meet the following
requirements.
7.6.2.1 At least meet the requirements of three repeated inspections;
7.6.2.2 When it is necessary to keep the test-prep samples, the requirements for the test-prep
samples shall be met;
8 Sampling Safety
See national standard GB/T 3723.
9 Sampling Records and Sampling Report
The unit number of overall material The minimum selected unit number
All units
10 Sample Container and Storage
10.1 Sample container
10.2 Sample label
10.2.1 The name and serial number of sample;
10.2.5 The quantity of sample;
10.2.6 Sampling date;
10.2.7 Samplers, etc.
10.3 Saving and withdrawing of samples
The product sampling method standard or sampling operation procedure shall stipulate the
storage amount of the sample (as a test-pre sample), storage environment, storage time and
withdrawal method.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 6678-2003 be delivered?Answer: The full copy PDF of English version of GB/T 6678-2003 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 6678-2003_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 6678-2003_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 6678-2003 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 6678-2003?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6678-2003 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 6678-2003?A step-by-step guide to download PDF of GB/T 6678-2003_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 6678-2003".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |