Skip to product information
1 of 4

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 7531-2008 English PDF (GBT7531-2008)

GB/T 7531-2008 English PDF (GBT7531-2008)

Regular price $70.00 USD
Regular price Sale price $70.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 7531-2008 to get it for Purchase Approval, Bank TT...

GB/T 7531-2008: Determination of ignition residue for organic chemical products

This Standard specifies the general method for the direct determination of ignition residues for organic chemical products. This Standard applies to the determination of ignition residue content for organic chemical products.
GB/T 7531-2008
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 71.040.40
G 15
Replacing GB/T 7531-1987
Determination of ignition residue
for organic chemical products
(ISO 6353-1:1982, Reagents for chemical analysis -
Part 1: General test methods, NEQ)
ISSUED ON: JUNE 04, 2008
IMPLEMENTED ON: DECEMBER 01, 2008
Issued by: General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 General provisions ... 4
4 Method summary ... 5
5 Reagents ... 5
6 Instruments ... 5
7 Analysis steps ... 5
8 Result calculation ... 6
9 Allowable difference ... 6
Foreword
The degree of consistency between this Standard and 5.15 (GM15) of ISO
6353:1:1982, Reagents for chemical analysis - Part 1: General test methods, NEQ, is non-equivalent.
This Standard replaces GB/T 7531-1987, Determination of ash content for organic chemical products.
Compared with GB/T 7531-1987, the major changes of this Standard are as follows:
-- Change the standard from "Determination of ash content for organic
chemical products" to "Determination of ignition residue for organic
chemical products" (cover of version 1987, cover of this version);
-- Add the normative references (see Chapter 2 of this Standard);
-- Change the volume of the crucible from (50 ~ 100) mL to (30 ~ 100) mL (3.3 of version 1987, 6.3 of this version).
-- Modify the weighing mass from ?€?it shall be based the acquisition of 5 mg ~ 30 mg of residue?€? to ?€?it shall be based on the acquisition of not less than 3 mg of residue?€? (5.3 of version 1987, 7.3 of this version);
-- Modify the allowable difference between two parallel determination results (Chapter 6 of version 1987, Chapter 7 of this version).
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of Organic Branch, National Standardization Technical Committee of Chemical (SAC/TC 63/SC 2).
The drafting organizations of this Standard: Jinan IFT Science and Technology Co., Ltd., Chemical Technology Academy of Shandong Province.
Organizations that participate in the drafting of this Standard: Hubei Yihua Chemical Industry Co., Ltd.
The drafters of this Standard: Han Shuxia, Zhang Guiqin, Li Shihui, Zou Benlian. This Standard was first published in March 1987.
Determination of ignition residue
for organic chemical products
Warning: This standard does not mention all safety issues that are related to the use of the standard. It is the responsibility of the user to take appropriate safety and protective measures and to ensure compliance
with the relevant national regulations.
1 Scope
This Standard specifies the general method for the direct determination of ignition residues for organic chemical products.
This Standard applies to the determination of ignition residue content for organic chemical products.
2 Normative references
The terms in the following documents become the terms of this Part by
reference to this Part. For dated references, all subsequent amendments (not including errata content) or revisions do not apply to this Part. However, parties to agreements that are based on this Part are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest edition applies to this Part.
GB/T 603-2002, Chemical reagent. Preparations of reagent solutions for use in test methods (ISO 6353-1:1982, NEQ)
3 General provisions
Unless otherwise stated, use only reagents that are identified as analytical reagent in the analysis
The preparations and products that are used in the analysis are prepared according to the provisions of GB/T 603-2002 when no other requirements are indicated.

View full details