This method is for the determination of asbestos in drinking water and drinking water supplies. The method determines the numberical concentration of asbestos fibers, the length and width of each fiber, and the estimated mass concentration of asbestos in the water. The fiber size and aspect ratio distributions can also be determined.
The sample is treated with ozone and ultraviolet light to oxidize organic matter and then filtered through a 0.1 micron polycarbonate filter. A carbon coating is applied to the filter in a cauum to the active surface and a small portion of the filter is analyzed by TEM (transmission electron microscopy).
Do not add acids to the sample container for preservation.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Analyze the sample as soon as possible after collection. |
| Preservatives: | Store in the dark and at 5°C to minimize algal and bacterial growth. |
| Required Preps: | 1L Polyethylene or glass bottle with a Teflon-lined lid. Avoid polypropylene bottles. |
| Collection Method: | Grab sampling |
| Analytical Methodology: | TEM |
| Documentation: | 
100.1
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Asbestos | 1332-21-4 |
0.2 |
MFL (million fibers per liter) | |
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.