Water vapor emitted from the panel was collected in the impingers
and volume of water emitted was determined by subtracting the amount of water that was originally in the impingers
In the second sampler, using an impinger
for bubbling, the oxidation of MTS was measured by liquid chromatography with detection at 224 nm .
We have not located any health-based generic PM limits using real-time count concentration values (certain workplace mineral dust standards require collection with an impinger
, followed by microscopic counts).
sampling stations equipped as before were deployed along Van Eegan Road (Figure 1) on December 8 and 9 at 0.25 mile (402.3 m) intervals for the first mile (1,609.3 m) of the sampling array, followed by 0.5 mile (804.6 m) intervals for the remaining 4.5 mile (7,242 m) sampling line.
After sampling was completed, all the impinger
bottles and connecting tubes were rinsed with isopropanol solvent and the sample was collected in a single flask and heated to 83[degrees]C for about 45 minutes till all the isopropylene solvent was evaporated.
The tar content in the producer gases was measured using six impinger
bottles, five of which were filled with a solvent (isopropanol) and one which was empty, as in [7, 9, 10].
In Oregon, the condensed hydrocarbons found in the impinger
train may also be analyzed.
Method 202, also referred to as the dry impinger
method, condenses materials that may have passed through the filter in ice cooled impingers
A brief note on these two exposure assessment methods: Before the 1970s, airborne asbestos levels were usually measured with the midget impinger
method by trapping total airborne (including nonfibrous) dust particles and counting via light microscope (Gibbs 1994).
Setting up of the method was achieved with pure suspensions of Aspergillus fumigatus and Penicillium brevicompactum conidia at different concentrations, and then analyses were extended to field samples collected by an impinger
and slit samplers are the most commonly used samplers for collecting aerosol viruses (Agranovski et al., 2005; Booth et al., 2005; Hermann et al., 2006; Tseng & Li, 2005).
In 1922 and 1937, the impinger
and the midget impinger
were introduced, respectively, in the United States, expressing particle concentrations of millions of particles per cubic foot.