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GB/T 8152.2-2006 PDF English

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GB/T 8152.2-2006: Methods for chemical analysis of lead concentrates -- Determination of lead content -- Back titration of EDTA after precipitation of lead sulfate (ISO 11441: 1995E Lead sulfide concentrates -- Determination of lead content -- Back titration of EDTA after
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GB/T 8152.2: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 8152.2-2006English190 Add to Cart 0-9 seconds. Auto-delivery Methods for chemical analysis of lead concentrates -- Determination of lead content -- Back titration of EDTA after precipitation of lead sulfate (ISO 11441: 1995E Lead sulfide concentrates -- Determination of lead content -- Back titration of EDTA after Valid
GB/T 8152.2-1987English199 Add to Cart 2 days Methods for chemical analysis of lead concentrates--The Na2 EDTA volumetric method for the determination of zinc content Obsolete

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GB/T 8152.2-2006: Methods for chemical analysis of lead concentrates -- Determination of lead content -- Back titration of EDTA after precipitation of lead sulfate (ISO 11441: 1995E Lead sulfide concentrates -- Determination of lead content -- Back titration of EDTA after



---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT8152.2-2006
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.060 D 42 GB/T 8152.2-2006 / ISO 11441:1995 Replacing GB/T 8152.1-1987 Methods for chemical analysis of lead concentrates - Determination of lead content - Back titration of EDTA after precipitation of lead sulfate (ISO 11441:1995E Lead sulfide concentrates - Determination of lead content - Back titration of EDTA after precipitation of lead sulfate, IDT) ISSUED ON: AUGUST 24, 2006 IMPLEMENTED ON: FEBRUARY 01, 2007 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC; Standardization Administration of the PRC.

Table of Contents

Foreword ... 3 1 Scope ... 6 2 Normative references ... 6 3 Principle ... 6 4 Reagents ... 7 5 Apparatus ... 11 6 Sample ... 11 7 Procedure ... 12 8 Expression of results ... 15 9 Precision ... 16 10 Test report ... 19 Annex A (Normative) Procedure for the preparation and determination of the mass of a predried test portion ... 20 Annex B (Normative) Flow sheet of the evaluation procedure for the acceptance of analytical values for test samples ... 23 Annex C (Informative) Derivation of precision equations ... 24

Foreword

GB/T 8152-2006 “Methods for chemical analysis of lead concentrates” has 10 parts: - GB/T 8152.1 Methods for chemical analysis of lead concentrates - Determination of lead content - EDTA titration method after acid digestion; - GB/T 8152.2 Methods for chemical analysis of lead concentrates - Determination of lead content - Back titration of EDTA after precipitation of lead sulfate; - GB/T 8152.3 Methods for chemical analysis of lead concentrates - Determination of aluminium (III) oxide content - Chrome azurol S spectrophotometric method; - GB/T 8152.4 Methods for chemical analysis of lead concentrates - Determination of zinc content - EDTA titration method; - GB/T 8152.5 Methods for chemical analysis of lead concentrates - Determination of arsenic content - Atomic fluorescence spectrometer method; - GB/T 8152.7 Methods for chemical analysis of lead concentrates - Determination of copper content - Flame atomic absorption spectrometric method; - GB/T 8152.9 Methods for chemical analysis of lead concentrates - Determination of magnesium oxide content - Flame atomic absorption spectrometric method; - GB/T 8152.10 Methods for chemical analysis of lead concentrates - Determination of silver and gold content - Fire assay and flame atomic absorption spectrometric method using scorification or cupellation; - GB/T 8152.11 Methods for chemical analysis of lead concentrates - Determination of mercury content - Atomic fluorescence spectrometer method; - GB/T 8152.12 Methods for chemical analysis of lead concentrates - Determination of cadmium content - Flame atomic absorption spectrometric method. GB/T 8152.6-1987 “Methods for chemical analysis of lead concentrates - The polarographic method for the determination of bismuth content” and GB/T 8152.8-1987 “Methods for chemical analysis of lead concentrates - The DTPM spectrophotometric method for the determination of bismuth content” are not changed. This Part is Part 2. This Part is identical to ISO 11441:1995 (E) “Lead sulfide concentrates - Determination of lead content - Back titration of EDTA after precipitation of lead sulfate”. For ease of use, this Part has made the following editorial changes: a) USE a decimal point “.” to replace the comma “,” used as a decimal point in international standards; b) USE “this Part” to replace “this International Standard”; c) CHANGE the standard name according to Chinese habits; d) Delete the cover, contents, foreword and introduction in the international standard. This Part replaces GB/T 8152.1-1987 “Methods for chemical analysis of lead concentrates - The Na2 EDTA volumetric method for the determination of lead content”. Because of the development of international analysis technique, the previous standard has been outdated. Compared with GB/T 8152.1-1987, there are the following changes: a) This Part is changed from the direct titration of the previous national standard to the back titration, which solves the problem of determination of high barium lead concentrate. b) This Part adds normative general elements such as “scope” and “normative references”, and adds normative technical elements such as “precision” and “test report”, to make the standard text more complete. c) Delete annex A of the previous national standard “Determination of the lead content when the barium content exceeds one-tenth of the lead content”. d) ADD annex A “Procedure for the preparation and determination of the mass of a pre-dried test portion”, annex B “Flow sheet of the evaluation procedure for the acceptance of analytical values for test samples”, annex C “Derivation of precision equations”. Annexes A and B of this Part are normative annexes. Annex C is an informative annex. Methods for chemical analysis of lead concentrates - Determination of lead content - Back titration of EDTA after precipitation of lead sulfate

1 Scope

This Part specifies a lead sulfate precipitation EDTA titrimetric method for the determination of lead content in lead sulfide concentrates. This Part is applicable to all lead sulfide concentrates with lead content in the range from 10 % (m/m) to 80 % (m/m).

2 Normative references

The following standards contain provisions which, through reference in this Part, constitute provisions of this Part. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Part are encouraged to use the most recent editions of the following standards as much as possible. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 385-1:1984 Laboratory glassware - Burettes - Part 1: General requirements ISO 648:1977 Laboratory glassware - One-mark pipettes ISO 1042:1983 Laboratory glassware - One-mark volumetric flasks ISO 4787:1984 Laboratory glassware - Volumetric glassware - Methods for use and testing of capacity ISO 9599:1991 Copper, lead and zinc sulfide concentrates - Determination of hygroscopic moisture in the analysis sample - Gravimetric method ISO Guide 35:1989 Certification of reference materials - General and statistical principles

3 Principle

The stages which comprise the determination are described in 3.1 to 3.4 ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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