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YS/T 535.7-2009 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.
YS/T 535.7-2009: Chemical analysis methods of sodium fluoride. Part 7: Determination of acidity. Neutral titration method
Status: Valid

YS/T 535.7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 535.7-2009	149	Add to Cart	2 days	Chemical analysis methods of sodium fluoride. Part 7: Determination of acidity. Neutral titration method	Valid
YS/T 535.7-2006	199	Add to Cart	2 days	Methods for chemical analysis of sodium fluoride The neutral titration for the determination of acidity	Obsolete

Similar standards

YS/T 581.15 GB/T 1425 GB/T 351 YS/T 535.11 YS/T 535.2 YS/T 535.10

Basic data

Standard ID: YS/T 535.7-2009 (YS/T535.7-2009)
Description (Translated English): Chemical analysis methods of sodium fluoride. Part 7: Determination of acidity. Neutral titration method
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H21
Classification of International Standard: 71.060.50
Word Count Estimation: 5,585
Date of Issue: 2009-12-04
Date of Implementation: 2010-06-01
Older Standard (superseded by this standard): YS/T 535.7-2006
Quoted Standard: YS/T 535.10-2009
Regulation (derived from): MIIT [2009] No. 66
Issuing agency(ies): Ministry of Industry and Information Technology
Summary: This standard specifies the NaF acidity (expressed in hydrogen fluoride) measurement method. This standard applies to sodium fluoride in acidity (expressed in hydrogen fluoride) determination. Measuring range (mass fraction): �� 1. 00%.

YS/T 535.7-2009: Chemical analysis methods of sodium fluoride. Part 7: Determination of acidity. Neutral titration method

---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.
Chemical analysis methods of sodium fluoride. Part 7. Determination of acidity.Neutral titration method ICS 71.060.50 H21 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 535.7-2006 Chemical analysis of sodium fluoride Part 7. determination of acidity and neutralization method 2009-12-04 released 2010-06-01 Implementation Issued by the Ministry of Industry and Information Technology of the People's Republic of China

Foreword

YS/T 535 "sodium fluoride chemical analysis method" is divided into 10 parts. - Part 1. Determination of wet water content - Weight method; - Part 2. Determination of fluorine content - Distillation - thorium nitrate titration capacity method; - Part 3. Determination of silicon content - Molybdenum blue spectrophotometric method; - Part 4. Determination of iron content - o - phenanthroline spectrophotometric method; - Part 5. Determination of soluble sulfate content - Turbidimetric method; - Part 6. Determination of carbonate content - Gravimetric method; - Part 7. Determination of acidity and neutral method; - Part 8. Determination of water insoluble content - Gravimetric method; - Part 9. Determination of chlorine content - Turbidimetric method; - Part 10. Preparation and storage of specimens. This section is part 7. This part replaces YS/T 535.7-2006 (original GB/T 8158.7-1987). This part is the YS/T 535.7-2006 "sodium fluoride chemical analysis method neutralization method of acidity" revision, and YS/T 535.7- 2006 compared to increase the precision and quality assurance and control and so on. This part of the National Nonferrous Metals Standardization Technical Committee proposed and centralized. This part is drafted by Fushun Aluminum Co., Ltd. and China Nonferrous Metals Industry Standard Measurement Quality Research Institute. This part is drafted by Fushun Aluminum Company Limited. This part of the main drafters. Wang Yuling, Xu Tieling, Wu Yuchun. This part of the previous version of the standard to replace the release of the situation. YS/T 535.7-2006 (original GB/T 8158.7-1987). Chemical analysis of sodium fluoride Part 7. determination of acidity and neutralization method

1 Scope

This section specifies the determination of acidity (expressed as hydrogen fluoride) in sodium fluoride. This part applies to the determination of acidity (expressed as hydrogen fluoride) in sodium fluoride. Determination range (mass fraction). ≤1.00%.

2 normative reference documents

The terms of this document are incorporated by reference in this section and become part of this section. Whichever is the date of the reference file, which is followed by all (Excluding corrigenda) or revisions do not apply to this part, however, encourage parties to reach an agreement under this section Whether you can use the latest version of these files. For undated references, the latest edition applies to this section. Methods for chemical analysis of sodium fluoride - Part 10. Preparation and storage of samples YS/T 535.10-2009

3 method summary

After the sample was dissolved in water, the acidity was measured by acid-base neutralization in the presence of potassium chloride.

4 reagent

4.1 Potassium chloride. Saturated solution. 4.2 phenolphthalein ethanol solution (10g/L). 4.3 no carbon dioxide distilled water. the distilled water to boil for 20min, after cooling stored in glass bottles, with a lime lime attached to the stopper Cover it. 4.4 sodium hydroxide standard solution (0.2500mol/L), prepared as follows. 4.4.1 Preparation. Weigh 10 g of sodium hydroxide, placed in a polyethylene cup, add 100 mL of water, dissolve it, and then move into a 1 L volumetric flask , Diluted with water to the mark, mix well. Immediately move into a polyethylene bottle. 4.4.2 Calibration. phenolphthalein as an indicator, with 0.2500mol/L standard hydrochloric acid solution calibration. Calculate the actual concentration of sodium hydroxide standard titration solution according to formula (1) C = c0 × V 1 V 2 (1) Where. C - the actual concentration of sodium hydroxide standard titration solution in moles per liter (mol/L); C0 - the concentration of hydrochloric acid standard solution in moles per liter (mol/L); V 1 --- Remove the volume of hydrochloric acid standard solution in milliliters (mL); V 2 --- titration, titration hydrochloric acid standard solution consumed sodium hydroxide standard titration solution volume, in milliliters (mL).

5 instruments

General laboratory equipment.

6 samples

The specimen shall comply with the requirements of 4.2 of YS/T 535.10-2009. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of YS/T 535.7-2009_English be delivered?

Answer: Upon your order, we will start to translate YS/T 535.7-2009_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 YS/T 535.7-2009_English with my colleagues?

Answer: Yes. The purchased PDF of YS/T 535.7-2009_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 YS/T 535.7-2009?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version YS/T 535.7-2009 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.