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GB/T 18856.7-2008 English PDF

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US$149.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 18856.7-2008: Test methods for coal water mixture -- Part 7: Determination for pH value
Status: Valid

GB/T 18856.7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 18856.7-2008	149	Add to Cart	2 days	Test methods for coal water mixture -- Part 7: Determination for pH value	Valid
GB/T 18856.7-2002	239	Add to Cart	2 days	Test methods for quality of coal water mixture -- Part 7: Proximate analysis of coal water mixture	Obsolete

Similar standards

GB/T 19494.1 GB/T 19494.2 GB/T 18511 GB/T 18856.3 GB/T 18856.4 GB/T 18856.2

Basic data

Standard ID: GB/T 18856.7-2008 (GB/T18856.7-2008)
Description (Translated English): Test methods for coal water mixture -- Part 7: Determination for pH value
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D21
Classification of International Standard: 75.160
Word Count Estimation: 5,562
Date of Issue: 2008-07-29
Date of Implementation: 2009-04-01
Older Standard (superseded by this standard): GB/T 18856.14-2002
Quoted Standard: GB/T 6682
Regulation (derived from): National Standard Approval Announcement 2008 No.12 (Total No.125)
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 method for measuring the pH of coal-water slurry feed, reagents, equipment, measuring step, outcome statements and precision and so on. This section applies to a variety of CWS.

GB/T 18856.7-2008: Test methods for coal water mixture -- Part 7: Determination for pH value

---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.
Test methods for coal water mixture Part 7. Determination for pH value ICS 75.160 D21 National Standards of People's Republic of China Replacing GB/T 18856.14-2002 CWS Test Method Posted 2008-07-29 2009-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revision of GB/T 18856 "CWS Test Method" is divided into seven sections. --- Part 1. Sampling; --- Part 2. Determination of the concentration; --- Part 3. screening tests; --- Part 4. Determination of apparent viscosity; --- Part 5. Determination of stability; --- Part 6. Determination of density; Part --- Article 7. pH value measurement. This standard replaces GB/T 18856-2002 "Test methods for quality of coal water." This standard compared with GB/T 18856-2002, the main differences are as follows. --- Deleted - Part 6. Determination of calorific value coal water slurry; --- Deleted Part 7. CWS industry analysis; --- Deleted Part 8. Determination of total sulfur in coal water slurry; --- Deleted Part 10. Determination of the ash fusion CWS; --- Deleted Part 11. Determination of Hydrocarbon CWS; --- Deleted Part 12. CWS nitrogen determination method; --- Deleted Part 13. CWS ash component measurement method. Delete the contents were integrated into the standard measurement method related to coal and coal ash. This section GB/T Part of 718,856. This revision retains the entire contents of the GB/T version 18856.14-2002, only for Revised format. This Part replaces GB/T 18856.14-2002 "Test methods for quality of coal water - Part 14. CWS pH value measurement method." This part is proposed by the China Coal Industry Association. This part of the National Standardization Technical Committee centralized coal. This section is drafted. CCRI coal analysis laboratory. The main drafters of this section. Fu Cong, Shi Yuying, Min. This part of the standard replaces the previous editions are. --- GB/T 18856.14-2002. CWS Test Method

1 Scope

This section GB/T 18856 specifies the method feeds, reagents, instruments and equipment CWS pH value measurement, the measuring step, results are expressed And precision and so on. This section applies to a variety of CWS.

2 Normative references

The following documents contain provisions which, through reference GB/T 18856 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encouraged to reach under this section Research into whether the parties to the agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. Laboratory use specifications and test methods GB/T 6682 Analysis

3 Method summary

The glass electrode pH meter and calomel electrode immersed in the CWS, the potential difference between two electrodes, thereby giving the CWS pH.

4 Reagents

4.1 Water The water used in this section to comply with two water GB/T 6682 may require. Before use freshly boiled and cooled to room temperature. Weigh 3.40g potassium dihydrogen phosphate (GB/T 6853) and 3.55g disodium hydrogen phosphate (GB/T 6854), dissolved in water and diluted to 1000mL. Potassium dihydrogen phosphate and disodium hydrogen phosphate in advance (120 ± 10) ℃ drying 2h. Weigh 110 ℃ drying 1h at 10.21g of potassium hydrogen phthalate (GB/T 6857), dissolved in water and diluted to 1000mL. Weigh 3.81g sodium tetraborate (GB/T 6856), dissolved in water and diluted to 1000mL. It may be formulated in accordance with the instructions pH standard material certificates. When the pH value of each standard solutions at different temperatures as shown in Table 1. Temperature/℃ neutral phosphate standard solution of potassium hydrogen phthalate standard solution borate standard solution 0 6.98 4.00 9.46 5 6.95 4.00 9.40 10 6.92 4.00 9.33 ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 18856.7-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 18856.7-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 18856.7-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 18856.7-2008_English will be deemed to be sold to your employer/organization who actually pays 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+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 18856.7-2008?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 18856.7-2008 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.