ZhongKeLongHui mission is to contribute to health and safety in both living and work surroundings. The laboratory examines water, air, ground and material samples for the possible presence of hazardous substances and bacteria such as asbestos and Legionella. As one of the leading inspection and testing companies we can help safeguard your interests and minimise associated risk.

Note: according to customer requirements,issued by the different language versions of the report of the testing.

>> Detection of asbestos: asbestos materials, asbestos in the air.

1, asbestos dust in the air detection: classification of asbestos, asbestos fibers, such as the number of indicators.

2, detection of asbestos materials: building materials (including cement, coatings, waterproofing, insulation materials, etc.), insulation, friction material (brake, and so on) whether or not containing asbestos.

Asbestos fibers in its unique physical properties of chemicals used in building materials, insulation materials, insulation, seal materials, friction materials, the materials found in a wide range of daily life. Asbestos fibers on the human health effects have been more in-depth studies into the body of the asbestos fibers may be pathogenic.
Clients: the production of asbestos-containing materials, building owners in day-to-day maintenance of buildings, environmental health and safety audit of industrial enterprises.

Detection indicators: asbestos materials, asbestos in the air.
Service Process: In an client, experienced professionals will be entrusted with the staff to investigate the presence of asbestos, asbestos hazards and the extent of the impact of the scope of the use of professional methods, the collection of asbestos-containing suspicious materials, send Laboratory testing and analysis of the report.

The detection of asbestos, the key lies in the sample, whether collected representative samples containing asbestos, asbestos detection is the key point in the first and the other asbestos samples in microscopy analysis of the professional staff on the technical requirements are very high, need to be aware of the different The types of asbestos fibers in the shape under the microscope.

>> Materials in the detection of asbestos fibers：

Scanning electron microscope - to determine spectroscopy system to identify asbestos fibers have unique advantages: scanning electron microscope observation of the topography features can be the difference between fiber and other non-fibrous particles particles, and based on the characteristics of shape to make a preliminary ruling; Spectroscopy system through the observation of the fiber particles for elemental analysis, drawn by the particles of elements, compared with the standard spectrum, to identify whether such a fiber of asbestos fibers, asbestos and the type of judge.

In recent years, was commissioned by the unit determined the material are two types of samples, materials (including cement, coatings, waterproofing, insulation materials, etc.) and the friction material (brake). To smash through the sample material, organic matter removal, sample preparation, sample surface conductive plasma spraying, and electron microscopy observations measured steps. The following are typical of asbestos materials and photographs fiber spectrum.

>> Asbestos in the workplace asbestos fibers in the air testing:

Asbestos fibers in the air to detect the need for on-site sample collection, for the use of electron microscopy analysis of the nuclear pore membrane to carry out the work of collection. Cut a small piece of sample collection good film, with double-sided conductive plastic sheets fixed in the electron microscope samples of the platform-specific, on the surface conductive coating particles, and then into scanning electron microscope in the test.

Asbestos fibers to determine the methods and materials of the same methods. Asbestos fiber counts of principle: the length of the fiber is greater than 5 microns, the width of less than 3 microns, the aspect ratio greater than 3:1. Detection of this principle to carry out asbestos fiber counts. Detection of certain asbestos fibers in the area of the root of the number projected for the whole sample of asbestos fiber membrane of the total number of roots, and then divided by the sample size, can be converted into a unit the size of asbestos fibers in the air a few root.

>> ISO 14966:2002
Ambient air -- Determination of numerical concentration of inorganic fibrous particles -- Scanning electron microscopy method

ISO 14966:2002 specifies a method using scanning electron microscopy for determination of the concentration of inorganic fibrous particles in the air. The method specifies the use of gold-coated, capillary-pore, track-etched membrane filters, through which a known volume of air has been drawn. Using energy-dispersive X-ray analysis, the method can discriminate between fibres with compositions consistent with those of the asbestos varieties (e.g. serpentine and amphibole), gypsum and other inorganic fibres. Annex C provides a summary of fibre types which can be measured.

ISO 14966:2002 is applicable to the measurement of the concentrations of inorganic fibrous particles in ambient air. The method is also applicable for determining the numerical concentrations of inorganic fibrous particles in the interior atmospheres of buildings, for example, to determine the concentration of airborne inorganic fibrous particles remaining after the removal of asbestos-containing products.

The range of concentrations for fibres with lengths greater than 5 micrometres, in the range of widths which can be detected under standard measurement conditions, is approximately 3 fibres to 200 fibres per square millimetre of filter area. The air concentrations, in fibres per cubic metre, represented by these values are a function of the volume of air sampled.

NOTE The ability of the method to detect and classify fibres with widths lower than 0,2 micrometres is limited. If airborne fibres in the atmosphere being sampled are predominantly less than 0,2 micrometres in width, a transmission electron microscopy method such as ISO 10312 can be used to determine the smaller fibres.