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GB/T 23368.1-2009 English PDF

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US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 23368.1-2009: Methods for chemical analysis of ammonium metatungstate -- Part 1: Determination of water insoluble content -- Gravimetric analysis
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23368.1-2009	139	Add to Cart	3 days	Methods for chemical analysis of ammonium metatungstate -- Part 1: Determination of water insoluble content -- Gravimetric analysis	Valid

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Basic data

Standard ID: GB/T 23368.1-2009 (GB/T23368.1-2009)
Description (Translated English): Methods for chemical analysis of ammonium metatungstate -- Part 1: Determination of water insoluble content -- Gravimetric analysis
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H63
Classification of International Standard: 77.120.99
Word Count Estimation: 6,680
Date of Issue: 2009-03-19
Date of Implementation: 2010-01-01
Regulation (derived from): National Standard Approval Announcement 2009 No.3 (Total No.143)
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 determination metatungstate water insolubles content. This section applies to the determination of ammonium tungstate partial water insolubles content. Measurement range of 0. 0025% to 2%.

GB/T 23368.1-2009: Methods for chemical analysis of ammonium metatungstate -- Part 1: Determination of water insoluble content -- Gravimetric analysis

---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.
Methods for chemical analysis of ammonium metatungstate Part 1. Determination of water insoluble content Gravimetric analysis ICS 77.120.99 H63 National Standards of People's Republic of China Chemical analysis of ammonium paratungstate Part 1. Determination of the amount of water insoluble weighing method Posted 2009-03-19 2010-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 23368 "partial ammonium tungsten chemical analysis methods" is divided into two parts. --- Part 1. Determination of the amount of water insoluble weighing method; --- Part 2. Determination of zinc content - Flame atomic absorption spectrometric method. This is Part 1. This section of Appendix A normative appendix. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This section is Ganzhou Huaxing Tungsten Products Co., Ltd., China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting. This section is Chongyi Zhangyuan Tungsten Co., Ltd., Ganzhou Nonferrous Metallurgy Research Institute participated in the drafting. The main drafters of this section. Wang Changji, Zhang Qian, Fang Xuan such danger Ling Yun-Xia Zhang, Lai sword. Chemical analysis of ammonium paratungstate Part 1. Determination of the amount of water insoluble weighing method

1 Scope

This section GB/T 23368 specifies the determination of ammonium paratungstate in water insolubles content. This section applies to partial determination of ammonium tungstate in water insoluble amount measured in the range of 0.0025% to 2%.

2 Method summary

The sample is dissolved in water, insoluble matter was separated by filtration which, after drying quality value is the amount of water insoluble.

3 Reagents and materials

3.1 distilled water (or deionized water), controlled at 25 ℃ ± 5 ℃. 3.2 glass sand core crucible. G4.

4 Sample

Ammonium paratungstate samples do not need special treatment, it can be directly used for analysis. Step 5 Analysis 5.1 Sample Table 1. Weigh the sample to the nearest 0.01g. Table 1 Ammonium paratungstate Grade Sample volume/g AMT-P 71.4 AMT-J 79.3 5.2 Determination of the number of Independently measured twice and averaged. 5.3 Determination 5.3.1 The sample (5.1) was dissolved in 70mL ~ 80mL distilled water (or deionized water) (3.1), and clear to be dissolved and transferred to 100mL Volumetric flask (3.1) diluted to the mark with distilled water (or deionized water) and shake. 5.3.2 The test solution (5.3.1) has been dried in, a constant amount of a sintered glass crucible (3.2) and filtered with distilled water (or deionized water) (3.1), and dried Polyester, water washed until free of tungsten date (sulfur hydrobromide chromogenic test method, see Appendix A). The sand core crucible placed 105 ℃ ~ 110 ℃ oven temperature incubated 1h, after removing placed in the dryer to cool to room temperature and weighed. And then placed in 105 ℃ ~ 110 ℃ constant temperature dry Dry tank insulation 30min, after removing placed in the dryer to cool to room temperature and weighed. Repeat this operation to constant weight. Calculation results of the analysis of 6 The mass fraction of water insoluble to w1 and its value is expressed in%, according to formula (1). W1 m1 = m1 1- 0 m1 × 100 (1) ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 23368.1-2009_English be delivered?

Answer: Upon your order, we will start to translate GB/T 23368.1-2009_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 23368.1-2009_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 23368.1-2009_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.