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GB/T 7376-2008 English PDF

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US$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 7376-2008: Determination of micro-amounts of water in industrial Fluorinated alkane
Status: Valid

GB/T 7376: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7376-2008	209	Add to Cart	3 days	Determination of micro-amounts of water in industrial Fluorinated alkane	Valid
GB/T 7376-1987	239	Add to Cart	2 days	Fluorinated methanes for industrial uses--Determination of micro-amounts of water--Karl fischer methed	Obsolete

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Basic data

Standard ID: GB/T 7376-2008 (GB/T7376-2008)
Description (Translated English): Determination of micro-amounts of water in industrial Fluorinated alkane
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G15
Classification of International Standard: 71.080.20
Word Count Estimation: 9,949
Date of Issue: 2008-04-10
Date of Implementation: 2008-10-01
Older Standard (superseded by this standard): GB/T 10670-1989; GB/T 7374-1987; GB/T 7376-1987
Quoted Standard: GB/T 6283-1986; GB/T 6682-1992
Regulation (derived from): National Standard Approval Announcement 2008 No.5 (Total No.118)
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 test methods for industrial fluorinated alkanes cattle trace moisture measurement: Karl Fischer method-Capacity Act, Karl Fischer method-coulomb law and electrolysis. Electrolysis does not apply to a relatively high boiling point fluorinated alkanes. This standard applies to industrial use-Determination of fluorinated alkanes trace water.

GB/T 7376-2008: Determination of micro-amounts of water in industrial Fluorinated alkane

---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.
Determination of micro-amounts of water in industrial Fluorinated alkane ICS 71.080.20 G15 National Standards of People's Republic of China Replacing GB/T 7376-1987, GB/T 7374-1987, GB/T 10670-1989 Industrial Measurement moisture with fluorinated alkanes Trace Posted 2008-04-10 2008-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 7376-1987 "Fluorinated methanes for industrial use in the determination of trace water Karl Fischer method" GB/T 7374-1987 "industrial fluorinated methanes trace moisture Gravimetric method", GB/T 10670-1989 "industrial fluorinated Methane trace determination of water electrolysis. " The main changes compared to 7376-1987 standard and GB/T as follows. --- This standard is GB/T 7376-1987, GB/T 7374-1987, GB/T 10670-1989 standard integrated three amendments Merge to GB/T 7376 standards; --- Name of this standard by the "industrial fluorinated methanes trace moisture measurement Karl Fischer method" to "industrial fluorinated alkyl Determination of trace hydrocarbons in water "; --- On the "scope" chapter we made the appropriate modifications (1987 Edition Chapter 1, Chapter 4 of this edition); --- Increasing the Karl Fischer method --- Coulomb law (see 5.3); --- Increasing the electrolysis (see 5.4). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee branch of organic chemistry (SAC/TC63/SC2) centralized. This standard was drafted. Ying Peng Chemical Co., Ltd. Participated in the drafting of this standard. Zhejiang Chemical Co., Ltd. fluorescent. The main drafters of this standard. Yanrui Kang, Yang Xing Tong, Hu Dejun, Xie flood friends, Wang Hong Ying, Wu Yimin. This standard replaces the standard release case. --- GB/T 7376-1987; --- GB/T 7374-1987; --- GB/T 10670-1989. Industrial Measurement moisture with fluorinated alkanes Trace

1 Scope

This standard specifies the test methods for industrial use fluorinated alkanes in trace moisture measurement. Karl Fischer method --- volumetric method, Karl Fischer Law --- Coulomb law and electrolysis. Electrolysis does not apply to a relatively high boiling point fluorinated alkanes. This standard applies to industrial use - Determination fluorinated alkanes trace of moisture.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6283-1986 Determination of moisture content of chemical products Karl Fischer method (General method) GB/T 6682-1992 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987)

3 General Provisions

3.1 Unless otherwise stated in the analysis using only recognized as analytical reagents and GB/T 6682-1992 specified in the third grade water. Trace moisture measuring apparatus used in the tests 3.2 should ensure that seal. Each vent should be connected to a drying tube, the desiccant should be replaced. 3.3 test used in the sample cylinders, sampling catheters and needles and other equipment should be dry to avoid measurement error. 3.4 test method requires mixing, stirring speed should be consistent; consistent end judgment; avoid large measurement error. Sampling and sample pretreatment 4 According to relevant provisions of the standard product.

5 Test methods

5.1 Warning Some test procedures prescribed test method can lead to dangerous situations. The operator shall take appropriate safety and health practices. 5.2 Karl Fischer volumetric method --- 5.2.1 Method summary Sample water and Karl Fischer reagent quantitative reaction. Karl Fischer reagent with water beforehand accurately calibrate its titer to "dead stop Point "to judge the end. Milliliters consumption and its titer Karl Fischer reagent according to titration, calculate the content of water in the sample. Reaction. H2O + I2 + SO2 + 3C5H5N + CH3OH = 2C5H5N · HI + C5H5NH · SO4CH3 (light tan) 5.2.2 Instruments 5.2.2.1 Sample Cylinders. double-valve-type small stainless steel cylinder capacity of not less than 150mL, working pressure greater than 3.0MPa, see schematic Figure 1. Figure 1 Sample Cylinders schematic ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 7376-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 7376-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 7376-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 7376-2008_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 7376-2008?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7376-2008 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.