QB/T 3812.14-1999
Leather.Determination of sulphated total ash and sulphated water insoluble ash (English Version)

Standard No.

QB/T 3812.14-1999

Language

Chinese, Available in English version

Release Date

1984

Published By

Professional Standard - Light Industry

Status

Be replaced 2005-09

Replace By

QB/T 2719-2005

Latest

QB/T 2719-2005

Scope

This standard specifies the method for determining the total sulfate ash content and sulfate brine insoluble ash content of leather, and is applicable to various types of leather. This standard may not be accurate for leather containing organometallic compounds such as silicones (see note ① in 6.1). The amount of minerals obtained by ashing leather may differ from the actual content due to decomposition, reduction or volatilization of certain salts. The ash is treated with sulfuric acid, in which both salts and oxides are converted into sulfates. However, some salts can be converted into oxides again at a selected ignition temperature. Determination of the total mineral content, e.g. water-soluble and water-insoluble inorganic substances, within the full analytical range of leather can be determined by calculation or separate determination. Ammonium salts cannot be determined using this method.

QB/T 3812.14-1999 history

• 2005 QB/T 2719-2005 Leather-Chemical tests-Determination of sulphated total ash and sulphated water-insoluble ash
• 1984 QB/T 3812.14-1999 Leather.Determination of sulphated total ash and sulphated water insoluble ash

QB/T 3812.14-1999 Leather.Determination of sulphated total ash and sulphated water insoluble ash was changed to QB/T 2719-2005 Leather-Chemical tests-Determination of sulphated total ash and sulphated water-insoluble ash.