detect particles, then measure light scattering by the particle, and using assumptions about optical properties and density, assign a size to each particle to produce a mass concentration estimate--not a mass measurement.
At the 15 targeted nephelometer
locations, plus an additional 14 locations near the burns, trained local personnel placed passive samplers (which did not require a field operator or electricity) to measure particulate matter (RJ Lee Group, Monroeville, PA) and naphthalene (SKC Product Code: 575-003, Eighty Four, PA) for 24 to 120 hours and then sent the samplers to our laboratory for analysis.
have proven useful in many different industries including: sewage treatment; environmental monitoring; food and beverage; chemical process control; metal works; and paper and pulp processing.
, including the BN II, have automated detection algorithms designed to detect antigen excess.
Exposure assessment and modeling of particulate matter for asthmatic children using personal nephelometers
Turner Designs furnish laboratory type nephelometers
with analog or digital readout, adaptable to continuous flow monitoring.
The main manufacturers of nephelometers
, Beckman-Coulter and DadeBehring, recommend serum as a sample for most tests.
The pDR, like other nephelometers
, is biased under high humidity conditions.
are also expensive and are not used in many in small- and medium-sized clinical laboratories.
We employed portable nephelometers
providing continuous measurements and electronic data recording to optimize the temporal resolution of indoor particle levels in these homes.
Compared with the PENIA developed for the Dade Behring (Milton Keynes, United Kingdom) nephelometers
Specific serum proteins were quantified by BN 100 or BNA nephelometers
from Behringwerke AG and by Array 360 and/or Itiitnage nephelometers
from Beckman Instruments.