EPA Method 100.2


EPA Method 100.2 does not directly match ALS - Columbia's list of currently available methods. Please call for availability.


Method information displayed is provided for informational purposes only. No warranty (express or implied) is made as to the website accuracy, completeness, or applicability (such as the age of a method and whether or not it applies to your project). Please contact us for assistance. Analytical testing dots

PDF IconView Actual EPA Method 100.2 (PDF File)


EPA Method 100.2:
Asbestos in Water by TEM. Official Name: Determination of Asbestos Structures Over 10 um in Length in Drinking Water

Summary:
Known aliquots of a sample are filtered through a 0.1 to 0.22 um pore mixed cellulose ester (MCE). A carbon extraction replica is prepared from a portion of the filter and is examined in the TEM at a magnification of 10,000 to 20,000X. Asbestos structures are identified by morphology, selected area electron diffraction (SAED) and energy dispersive x-ray analysis (EDXA). Structures are then classified.

Scope:
This method determines the presence and quantitation of asbestos structures in drinking water samples. This method allows for the quantitation of structures greater than 10 um in length.

Citation:
Determination of Asbestos Structures Over 10 um in Length in Drinking Water (EPA/600R-94/134)

Interferences:
The following minerals exhibit morphological, chemical or crystal structure similarities similar to the asbestos minerals: Antigorite, Attapulgite (Palygorskite), Halloysite, Horneblende, Pyroxenes, Sepiolite, Vermiculite scrolls.

QC Requirements:
The quality control checks generally follow those specified in the Federal Register for AHERA analysis of air samples, and the NISTIR document relating to airborne asbestos analysis. Requirements are specified in the method, and include: sample receiving checks, sample prep checks (supplies and reagents, grid opening size, clean air monitoring, lab blank, etcher blank, grids/sample), sample analysis checks(system check, alignment check, mag calibration, camera constant, EDS line), performance checks (lab blanks, replicates, duplicates, standards, SRM, data entry, SAED patterns), and calculation checks.

Maximum Holding Time:
Filter within 48 hours of collection.

Media:
WATER

Subcategory:
Inorganic

Concentration:
See method.

Precision:
-

Detection:
A sensitivity of 200,000 fibers per liter (0.2 MFL) is generally required.

Revision Number:
Jun-94

Analytical testing dots


Examples:  8260
TO-15

Examples:  Dioxin
Mercury
Analytical testing dots


<-- Search All Test Methods



Suggestions? The test methods page continues to expand and improve. If you have suggestions for improvement, we would enjoy hearing from you. Please contact the webmaster here.


Analytical testing dots