GB/T 9345.1-2008 in English

《GB/T 9345.1-2008塑料 灰分的测定 第1部分：通用方法》由TC15（全国塑料标准化技术委员会）归口，TC15SC4（全国塑料标准化技术委员会通用方法和产品分会）执行，主管部门为中国石油和化学工业联合会。
GB/T 9345《塑料　灰分的测定》分为五个部分，本部分为GB/T 9345的第1部分。
本部分代替GB/T 9345-1988《塑料灰分通用测定方法》。
GB/T 9345的本部分规定了测定各种塑料（树脂及混合料）中灰分的通用方法及合适用试验条件。某种材料所选择的具体条件，可在该塑料的材料规范中规定。
本部分与GB/T 9345-1988相比，主要变化如下：
―――增加了精密度数据；
―――设备上增加了通风橱；
―――在涉及人身安全的试剂后增加了警示语。

1 Scope

This part of GB/T 9345 specifies general methods, with suitable test conditions, for the determination of the ash of a range of plastics (resins and compounds). The particular conditions chosen may be included in the specifications for the plastic material in question.

Particular conditions applicable to plastics containing glass fibre reinforcement, fillers and/or certain additives are specified in further parts of GB/T 9345 pertaining to specific types of plastics (see foreword).

2 Principle

It is possible to determine the ash of an organic material by three main methods:

a) Direct calcination, i.e. by burning the organic matter and heating the residue at high temperature until constant mass is reached (method A).

b) Calcination after sulfation, which may be carried out by two different procedures:

——With sulfuric acid treatment after burning, i.e. by burning the organic matter, transforming the inorganic residue into sulfates with concentrated sulfuric acid and heating the residue at high temperature until constant mass is reached. This is the common method of obtaining “sulfated ash” (method B).

Foreword i
1 Scope
2 Principle
3 Reagents (for Methods B and C Only)
4 Apparatus
5 Procedure
6 Number of Tests
7 Expression of Results
8 Precision
9 Test Report