This method is for the determination of beryllium from stationary sources, specifically ducts and stacks. This method is referred to as the Beryllium Screening Method. EPA Method 104 is a simliar method for the determination of beryllium emissions from stationary sources.
Samples are collected isokinetically using a probe, nozzle, filter, and metering/pump box. Each test consists of three runs collected at 3 different points in the duct or stack. The minimum flow rate specified by the method is 14L/min. (0.5cfm) and a minimum sampling time of 2 hours. The samples should estimate the amount of beryllium emitted into the atmosphere in a 24-hour period. The method recommends that stacks less than 1 foot in diameter not be sampled.
A glass fiber filter (Millipore AA or equivalent) is used for sample collection. It is recommended to place a cellulose fiber filter (Whatman 41 or equivalent) against the backside of the front filter as a guard against breakage. Both filters are analyzed for beryllium.
After collection, the filters are placed in a container along with an acetone rinse of the probe, filter holder. The samples are digested and analyzed per the method by "an appropriate technique". Appropriate techniques include GFAA (graphite furnace atomic absorption), ICP (inductively coupled plasma spectrometry) or ICP-MS. ICP and ICP-MS are the most common techniques used as they achieve the lowest analyte detection limits and are less time consuming for the laboratory.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in method. |
| Preservatives: | None specified in method. |
| Required Preps: | Glass fiber filter, cellulose fiber filter |
| Collection Method: | Sample collected following Method 103 procedures. |
| Analytical Methodology: | ICP or ICP/MS |
| Documentation: | 
103
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Beryllium | Be |
7440-41-7 |
0.11 |
µg/m³ |
* 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.