This standard specifies the test method for determining asbestos in products with X-ray powder diffractometer and polarizing microscope.
This standard is applicable to the determination of asbestos in building material, friction material, sealing material, thermal insulation material and nonmetallic mineral.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 10736 Working Chemical - Potassium Chloride
GB/T 15896 Chemical Reagent - Formic Acid
HG/T 2892 Chemical Reagent - Isopropyl Alcohol
3 Terms, Symbols and Units
3.1 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1.1
asbestos
the fiber silicate mineral (chrysotile) belonging to serpentine as well as the fiber silicate minerals (amosite, blue asbestos, tremolite, actinolite and anthophyllite) belonging to hornblende in the minerals constituting rocks
3.1.2
vermiculite
the mica swelling clay mineral. A generic term for minerals containing hydrated magnesium layer between structural layers but generally containing hydrobiotite (with large amount of potassium) in interlayer structure
3.1.3
fiber particle
the particle with the length-diameter ratio greater than 3
3.1.4
the first analysis sample
pulverize or heat the sample and then sieve it under certain conditions
