GB/T 7731.14-2008 English PDFUS$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7731.14-2008: Ferrotungsten -- Determination of lead content -- The polarographic method and inductively coupled plasma-atomic emission spectrometry Status: Valid GB/T 7731.14: Historical versions
Basic dataStandard ID: GB/T 7731.14-2008 (GB/T7731.14-2008)Description (Translated English): Ferrotungsten -- Determination of lead content -- The polarographic method and inductively coupled plasma-atomic emission spectrometry Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H11 Classification of International Standard: 77.100 Word Count Estimation: 11,182 Date of Issue: 2008-05-13 Date of Implementation: 2008-11-01 Older Standard (superseded by this standard): GB/T 7731.14-1988 Quoted Standard: GB/T 4010 Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121) 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 of the amount of lead ferrotungsten by polarography spectrometry and inductively coupled plasma atomic emission. This section applies to the determination of lead content ferrotungsten. Measuring range (mass fraction): 0. 001% to 0. 12%. Polarographic method for the determination of which the mass fraction of 0. 001% to 0. 05 % lead content, inductively coupled plasma atomic emission spectrometry determination of suitable mass fraction 0. 010% to 0. 12 % lead content. GB/T 7731.14-2008: Ferrotungsten -- Determination of lead content -- The polarographic method and inductively coupled plasma-atomic emission spectrometry---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. Ferrotungsten.Determination of lead content.The polarographic method and inductively coupled plasma-atomic emission spectrometry ICS 77.100 H11 National Standards of People's Republic of China Replacing GB/T 7731.14-1988 Determination of lead content of tungsten iron polarography And inductively coupled plasma atomic emission spectrometry Posted 2008-05-13 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis Part replaces GB/T 7731.14-1988 "Methods for chemical analysis of tungsten iron Polarographic determination of lead content." This portion of the GB/T 7731.14-1988 comparison, the main changes are as follows. --- Newly added by inductively coupled plasma atomic emission spectrometry; --- Standard text format has been revised text. This section is informative Appendix A Appendix. This part is proposed by the China Iron and Steel Association. This section is under the jurisdiction of Metallurgical Industry Information Standards Institute. This section is drafted. Sichuan Investment Emei Ferroalloy (Group) Co., Ltd. The main drafters of this section. should Tang Hua, Fang Yan, Liu Huili, Zhangying Xia. This part of the standard replaces the previous editions are. GB/T 7731.14-1988. Determination of lead content of tungsten iron polarography And inductively coupled plasma atomic emission spectrometry Warning. Use of this section shall be a person experiences regular laboratory work. This section does not indicate that all possible security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.1 ScopeThis section specifies the determination of the amount of lead iron tungstate spectrometry by polarography and inductively coupled plasma atomic emission. This section applies to the determination of tungsten iron lead content. Measurement range (mass fraction). 0.001% to 0.12%. Where applicable polarography Determination of the mass fraction of 0.001% to 0.05% lead content; inductively coupled plasma atomic emission spectrometry applied to the mass fraction Determination of 0.010% to 0.12% lead content.2 Normative referencesThe following documents contain provisions which, through reference in this section constitute provisions of this section. For dated references, subsequent All amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to reach an agreement under this section Research on whether to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 4010 alloy chemical analysis and preparation of samples 3 Method One. Polarographic 3.1 Principle Sample with nitric acid - hydrofluoric acid dissolved perchlorate smoke, adding tartaric acid, pH adjusted with sodium hydroxide and dissolved tungstate. In pH7.5 ~ PH8.0 case, the copper nitrate as the carrier, with thioacetamide precipitation lead to interference separation of elements, and then to iron as the carrier, separated with ammonia copper. In perchloric acid and phosphoric bottom liquid nitrogen to oxygen, at the peak potential is -0.51V was measured POLAROGRAPHY. 3.2 Reagents and materials Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water. 3.2.1 hydrofluoric acid, ρ1.15g/mL. 3.2.2 nitrate, ρ1.42g/mL. 3.2.3 perchloric acid, ρ1.67g/mL. 3.2.4 hydrochloric acid, 1 + 1. 3.2.5 hydrochloric acid, 1 + 2. 3.2.6 hydrochloric acid - nitric acid mixture, 3 + 1. 3.2.7 phosphoric acid solution, 1mol/L. 3.2.8 ammonia, ρ0.90g/mL. 3.2.9 ammonia, 1 + 2. 3.2.10 ammonia, 1 + 100. 3.2.11 ammonia, 1 + 200. 3.2.12 sodium hydroxide solution, 250g/L, stored in plastic bottles. 3.2.13 copper nitrate solution, 10g/L. 3.2.14 ferric nitrate solution, 1g/L, Weigh 1g of ferric nitrate dissolved in 50mL water, adding 5mL nitric acid, transferred to 1000mL capacity Bottle, diluted with water to volume, and mix. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7731.14-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 7731.14-2008_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 7731.14-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7731.14-2008 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. |
