air sample collection Articles
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The radiological impact on some workers due to the natural radionuclides from some industries
A total of 37 different soil samples and 22 air samples were collected from natural industrial sources. The air samples were collected at a height of 1 m above the ground on 10.4 cm diameter filter paper (with a desired collection efficiency) using a high-volume air sampler. The activity concentration levels of naturally occurring radionuclides such as the U-238 series and Th-232 series were ...
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Study of the indoor air quality in hospitals in South Chennai, India — microbial profile
A 3-month pilot study (February—April 2006) was conducted to determine the quality of indoor air in hospitals in the Tamil Nadu region of India and to characterize the predominant aerobic bacteria and fungi present. The main objectives were (1) to sample the indoor air of three different hospitals in Chennai for bioaerosols to generate baseline data using the Petri plate gravitational settling ...
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Evaluation of Respiratory Symptoms and Their Possible Association with Residential Indoor Bioaerosol Concentrations and Other Environmental Influences
The study discussed here evaluated the presence of self-reported respiratory symptoms and their association with indoor bioaerosol concentrations over a year-long study in the El Paso, Texas, region. The authors collected air samples from homes to assess seasonal differences in bacterial and fungal bioaerosol concentrations. They distributed a health questionnaire to the participating homeowner ...
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The Spectrex air sampler ideal for industrial hygiene.
Comments by an industrial hygiene supervisor in Texas "The Spectrex PAS-500 is a great tool for collecting both personal and area air samples. I have yet to have a worker complain about having to wear the pump. The workers appreciate the drastic reduction of weight and size when compared to the traditional low volume pumps. The best advantage of the PAS-500 is the clip that holds the pump ...
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Spatial and temporal variation, source profile and formation mechanisms of PCDDs/Fs in the atmosphere of an e‐waste recycling area, South China
The present study investigated the impact of typical electronic waste (e‐waste) dismantling activities on the distribution of polychlorinated dibenzo‐p‐dioxins (PCDDs) and dibenzofurans (PCDFs) in the adjacent atmospheric environment. The target areas included Longtang town, a well known e‐waste recycling site, and two impacted neighborhoods, all of which were within Qingyuan city, Guangdong ...
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Vertical and Diurnal characterization of volatile organic compounds in ambient air in Urban areas
More than half of the world’s population lives in cities, and their populations are rapidly increasing. Information on vertical and diurnal characterizations of volatile organic compounds (VOCs) in urban areas with heavy ambient air pollution can help further understand the impact of ambient VOCs on the local urban environment. This study characterized vertical and diurnal variations in ...
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Pesticides in Mississippi air and rain: A comparison between 1995 and 2007
A variety of current‐use pesticides were determined in weekly‐composite air and rain samples collected during the 1995 and 2007 growing seasons in the Mississippi Delta agricultural region. Similar sampling and analytical methods allowed for direct comparison of results. Decreased overall pesticide use in 2007 relative to 1995 generally resulted in decreased detection frequencies in air and ...
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Exposure and Dose Reconstruction for Chemicals: A Complex Activity
Defining the cause of an illness – genetics? Lifestyle? Occupational? When someone becomes ill and it’s not something that can be easily traced to a source, the question always arises: where did this come from? For example, a cold or flu can generally be traced to an event or source—kids, work, airline travel. But, what if it’s cancer or emphysema? These illnesses are ...
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Soil CO2 Flux Measurements -- Using the LI-8100 System to Collect Air Samples for Estimating Soil Trace Gas Flux
Air samples can be collected from the same air stream used to measure soil CO2 flux with the LI-8100 Automated Soil CO2 Flux System, for estimating the flux of trace gas, such as methane (CH4), ammonia (NH3), nitrous oxide (N2O), isotopic species, etc. This application note describes a simple method for obtaining air samples from the LI-8100 in the field. The concentration of the gas species for ...
By LI-COR
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Converting Particle Counter Data
When comparing results between different counters, the data can be compared only after the measurement units are matched which may require the particle counter data to be converted. Particle counts can be reported in four different ways: Raw-Differential (I) Normalized – Differential (II) Raw-Cumulative (III) Normalized-Cumulative (IV) ...
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Occupational exposures to lead-based paint in structural steel demolition and residential renovation work
Occupational exposures to lead are characterised for a number of different lead-based paint abatement techniques in two work settings: residential renovation and structural steel demolition. Exposure levels reported during heavy structural steel demolition work involving acetylene torch cutting, welding, and abrasive blasting can be more than 100 times greater than the permissible exposure limit ...
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Lead (Pb) in Workplace Air by Niton 700 Series Field Portable X-Ray Fluorescence (XRF) Analyzer
Procedure: Air samples are collected by drawing workplace air, using personal sampling pumps, through 37-mm mixed cellulose ester (MCE) filters mounted in polystyrene cassettes. Samples are prepared for XRF analyses by transferring each filter, along with the support pad, to a special air filter sample holder, specifically designed for a Niton XRF analyzer. Three separate 60-second readings are ...
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Metals and organic pollutants in snow surrounding an iron factory
Abstract To estimate air pollution snow samples were collected in March 2001 at six sites in the vicinity of the Kostomuksha factory in Karelia. Seventy-two chemical elements and more than 200 individual organic compounds were identified by inductively coupled plasma mass spectrometry (ICP-MS) and gas chromatography mass spectrometry (GC-MS). It was found that the levels of Li, B, Al, Fe, Ni, Cu, ...
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Application of an Enzyme-Linked Immunosorbent Assay for the Analysis of Paraquat in Human-Exposure Samples
Paraquat is a toxic quaternary ammonium compound used as an herbicide around the world. Easy, fast, and inexpensive but sensitive methods are needed to study the effects of long-term, low-level exposure of paraquat on human health. An enzyme-linked immunosorbent assay (ELISA) was used for quantification of paraquat in urine and air-filter samples collected in a human-exposure study among farm ...
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Estimated occupational risk from Bioaerosols generated during land application of class B biosolids
Some speculate that bioaerosols from land application of biosolids pose occupational risks, but few studies have assessed aerosolization of microorganisms from biosolids or estimated occupational risks of infection. This study investigated levels of microorganisms in air immediately downwind of land application operations and estimated occupational risks from aerosolized microorganisms. In all, ...
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The MoldScore Report
When evaluating indoor levels of most pollutants, one can collect air samples, compare the sampling results to established exposure standards, and make relatively unambiguous decisions regarding the need for remediation. Bioaerosols as a group are not amenable to this general methodology, due to the difficulties in the development of such exposure standards for reasons that have been discussed ...
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Air Sampling During NPP Accident
There has been considerable interest recently generated regarding emergency air sampling protocols as a result of the Fukushima accident in Japan. A major concern involving air sampling requirements is the accurate determination of gaseous-radioactive iodine species emitted from the NPP to the environment as a result of an accident. During normal NPP operation gaseous radioactive iodine ...
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Environmental impact of cured-in-place pipe renewal on an asbestos cement water main
According to the US Environmental Protection Agency's (USEPA) estimation, asbestos cement (AC) pipe accounts for approximately 15% of the total length of pipe networks for water distribution systems in North America; and just as other pipe materials, the AC mains are deteriorating and are in need of attention/renewal. However, there are concerns surrounding the environmental impact of AC pipe ...
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Improve air sampling by measuring mass flow
How can contaminant concentration be stated unless the sample mass is known? The answer: it can’t. Without an accurate measure of the mass of air collected as a sample, the relative concentration of a contaminant—whether it be chemical or particulate—cannot be stated as a part per million, billion, or trillion. Even for sampling applications where the contamination is expressed ...
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Risk Assessment and Brownfields: Determining Exposure to Site Contaminants
The USEPA’s Brownfields Program USEPA’s Brownfields Program was established to facilitate the rehabilitation of contaminated property for redevelopment. EPA has set forth criteria that must be met before a revitalized property can be used for residential, commercial or industrial purposes. The focus of these criteria is the long-term protection of residents, employees or visitors of ...
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