aerosol sample Articles
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Particle Sampling with Isoaxial and Isokinetic Airflow
The Conditions for Data Comparison When looking at data from two different particle counters, you’ll need to know if your sampling was performed with isoaxial and isokinetic airflow. But what do these terms mean? First let’s take a look at an example. Say you’re working in an area where airflows move from top to bottom. To minimize variation between aerosol particle counts, ...
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Particle Monitoring in Sterilizing Tunnels
Portable aerosol particle counters are designed to sample ambient air at 1 cubic foot per minute (1 cfm) and no greater than 35 oC. There are however applications which are based on ambient temperatures much greater than this, such as pharmaceutical sterilizing tunnels. Sterilizing tunnels are used to ensure sterility off glassware (vials, syringes, bottles) prior to their entry onto an aseptic ...
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Model-Measurement Consistency and Limits of Bioaerosol Abundance Over the Continental United States
Abstract. Due to low concentrations and chemical complexity, in-situ observations of bioaerosol are geographically and temporally sparse, and this limits the accuracy of current emissions inventories. In this study, we apply a new methodology, including corrections for misidentification of mineral dust, to measurements of single particles over four airborne sampling campaigns to derive vertical ...
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An Inert Desolvating Nebulizer System for Reduction of Matrix‐Induced Oxide Interferences on Rare Earth Elements, Iridium, and Platinum Using Quadrupole Inductively Coupled Plasma Mass Spectrometry
ABSTRACT This application note will examine the use of an inert low-flow desolvating nebulizer system for reduction of oxide mass spectral interferences that can occur in quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS). This nebulizer system uses an inert, low-flow nebulizer (100 microliters/min) coupled to an inert, heated membrane desolvator for efficient water vapor removal ...
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An Inert Desolvating Nebulizer System for Reduction of Matrix‐Induced Oxide Interferences on Rare Earth Elements, Iridium, and Platinum Using Quadrupole Inductively Coupled Plasma Mass Spectrometry
ABSTRACT This application note will examine the use of an inert low-flow desolvating nebulizer system for reduction of oxide mass spectral interferences that can occur in quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS). This nebulizer system uses an inert, low-flow nebulizer (100 microliters/min) coupled to an inert, heated membrane desolvator for efficient water vapor removal ...
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Ionic composition of aerosols at Northwestern Turkey
In this study, ionic compositions of 350 aerosol samples collected between April 2006 and May 2008 in a rural area at Northwestern Turkey (Black Sea coast of Turkey) were discussed. Ions accounted for approximately 30% of PM mass. Contributions of secondary aerosol species (NO3−, SO42− and NH42+) were higher than the ions with crustal origin. This indicated that sampling station was under the ...
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Continuous monitoring of hazardous smokestack metal emissions using inductively coupled argon plasma atomic emission spectrometry
Introduction Emission of hazardous air pollutant metals from the smokestacks of boilers, incinerators, and furnaces has become a matter of significant environmental concern and the object of increased regulatory scrutiny. At issue, is the ability of large-scale combustors such as these to maintain operation in compliance with the regulatory restrictions put in place to safeguard the public from ...
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Detection of Airborne Viruses in a Pediatrics Department Measured Using Real-Time qPCR Coupled to an Air-Sampling Filter Method
Children are vulnerable to viral infections. The study discussed in this article investigates the possibility of aerosol transmission of viruses in children under age 18 in the pediatrics department of a medical center in Taipei, Taiwan. After first using the filtration method to collect viral aerosols, the authors combined it with real-time quantitative polymerase chain reaction (qPCR) to detect ...
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Polyurethane Foam as an Effective Adsorbent for Pesticides in Air (GC Analysis)
Polyurethane foam (PUF) is a lightweight, easy-to-use material for sampling pesticides in air. Low back pressure allows sampling times and representative samples. A PUF filter cartridge designed to attach to the front of an ORBO-1000 PUF sampling cartridge traps aerosols and particulate matter, is easily and conveniently assembled, and can be removed from the ORBO-1000 cartridge and capped ...
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Monitor Organophosphorus Pesticides in Air, Using ORBO-49P Tubes and Capillary GC
A sampling tube containing Supelpak-20 resin and a glass fiber filter effectively adsorbs and releases five organophosphorous pesticides (chlorpyrifos, diazinon, dichlorvos, malathion, parathion) in vapor or aerosol form in air. At a sampling rate of 1L/min, 8 hour samples can be taken for all of these pesticides except malathion. Short term (15 min) samples can be taken at the same sampling ...
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