Testing
Overview
Testing
Services
Personnel
Equipment
Industries
Served
Test
Methods
Pollutants
Sources
Training
Oversight
Technical
Procedures
Technical
Questions
Safety
Quality |
|
|
Determination
of Beryllium Emissions from Stationary Sources – USEPA Method
104
USEPA Method 104 is used for the determination of Beryllium (Be) emissions
in ducts or stacks at stationary sources.
Particulate and gaseous Be emissions are withdrawn isokinetically
from the source and are collected on a glass fiber filter and in water.
The collected sample is digested in an acid solution and is analyzed
by atomic absorption spectrophotometry (AAS).
Analysis for Be by flame atomic absorption spectrophotometry is sensitive
to the chemical composition and to the physical properties (e.g.,
viscosity, pH) of the sample. Aluminum and silicon in particular
are known to interfere when present in appreciable quantities.
The analytical procedure includes (optionally) the use of the Method
of Standard Additions to check for these matrix effects, and sample
analysis using the Method of Standard Additions if significant matrix
effects are found to be present. |