This standard specifies the chemical methods for determining the composition of asbestos fibre, a key raw material for asbestos cement products. It details the procedures for quantifying components like loss on ignition, silica, iron oxides, alumina, and magnesia. This standard has been withdrawn by BIS due to the ban and health hazards associated with asbestos.
Method of test for determination of the chemical composition of asbestos fibre
Quick Reference Values
Ignition temperature for LOI test1000 ± 25 °C
Sample drying temperature105 to 110 °C
Minimum sample weight for analysis2 g
Key Formulas
% Loss on Ignition = [(W1 - W2) / W] * 100, where W1 is initial weight, W2 is weight after ignition
% Silica (SiO2) = (Weight of residue / Weight of sample) * 100
Practical Notes
This standard is obsolete and has been formally withdrawn. Its use is limited to historical/forensic analysis.
Extreme caution and specialized PPE are mandatory when handling asbestos fibres, as they are a known carcinogen.
The 'Loss on Ignition' test is a critical parameter, primarily indicating the amount of chemically bound water in the fibre.