metal monitoring Articles
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Measurement of Trace metals in Ambient air - Validation of a Rapid Technique with Gold Standard ICP-AES - Case Study
Trace metals are found at low concentration in the ambient environment and are associated with adverse health effects. The gold standard metal measurement is Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES); however, sample preparation is laborious and expensive. The Xact 625 metals monitor uses non-destructive X-ray fluorescence technology. A built-in sample collection system ...
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Measurement of trace metals in ambient air: Validation of a rapid technique with gold standard ICP-AES
Trace metals are found at low concentration in the ambient environment and are associated with adverse health effects. The gold standard metal measurement is Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES); however, sample preparation is laborious and expensive. The Xact 625 metals monitor uses non-destructive X-ray fluorescence technology. A built-in sample collection system ...
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Field demonstration of a near-real-time multi-metals ambient fence line monitor case study
National emissions standards for hazardous air pollutants (HAPs) are required under Section 112 of the Clean Air Act to limit the release of specified HAPs. Permitting, monitoring and enforcement of these emission limits are an integral part of managing air quality to protect human health and the environment. However, this is difficult and highly uncertain in the case of fugitive emissions ...
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Elemental composition of ambient aerosols measured with high temporal resolution using an online XRF spectrometer
Abstract. An Xact 625 ambient metals monitor was tested during a three-week field campaign at the rural, traffic-influenced site Härkingen in Switzerland during summer of 2015. The objective was to characterize the handling and operation of the instrument, evaluate the data quality by intercomparison with other independent measurements, and test its applicability for aerosol source ...
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Xact 625i in Nationwide Atmospheric Network
Xact 625i has been selected for the ASCENT network for characterizing aerosols in high time resolution using state-of-the-art instruments. SailBri Cooper, Inc. is pleased to announce its participation in Atmospheric SCience and mEasurement NeTwork (ASCENT). This new air monitoring network in the United States was made possible by a $12 million grant from the Mid-Scale Research Infrastructure ...
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Elemental composition of ambient aerosols measured with high temporal resolution using an online XRF spectrometer
Markus Furger1,*, María Cruz Minguillón2, Varun Yadav3, Jay G. Slowik1, Christoph Hüglin4, Roman Fröhlich1, Krag Petterson3, Urs Baltensperger1, André S. H. Prévôt1 1Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen 5 PSI, Switzerland 2Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de ...
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Inside the Particulate Monitor – Optical Methods
At least two different optical techniques can be applied to measure the concentration of particulates – light absorption and light scattering. Light absorption is frequently used in high-concentration industrial processes, but it has some applications also in ambient air, for example to determine visibility at airports. Light scattering is utilized both in industrial and ambient ...
By OPSIS AB
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Monitoring - Pollution Prevention Guidelines
Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum emissions ...
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Designing and Implementing Perimeter Air Monitoring Programs
Perimeter or fenceline ambient air quality and meteorological monitoring programs have become increasingly valuable at hazardous waste, landfill, dredging, ports, and MGP remediation sites. Air quality monitoring programs protect public health and reduce owner liability related to excavation. When ...
By AECOM
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SO2 Monitoring
SO2 monitoring is an efficient way to detect and reduce exposure to sulfur oxides which further benefits in reducing the formation of particulate sulfur pollutants like fine sulfate particles, acid rain, and smog. This article covers information on sulfur oxides, their sources, permissible levels in the ambient air, health and environmental impact, possible corrective measures, the need for ...
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Chlorine Monitoring
Elemental chlorine is a highly reactive, greenish-yellow gas. It has a suffocating, irritating, and pungent bleach-like odour that is detectable at low concentrations (above 0.3 – 0.5 ppm). Therefore, continuous or high-level exposure of the Cl2 can quickly deaden a person’s sense of smell, making the odour of Cl2 an unreliable indicator of its presence. Hence, other means such as ...
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Ozone Monitoring
Ground-level ozone is harmful to human health and the environment, especially on sunny days when its concentration can reach high levels. Also, it is a precursor of photochemical smog, which has its fatal effects. Real-time O3 monitoring helps in calculating the air quality index to deliver health advisories as well as formulating an action plan to meet standards. This article covers information ...
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NOx Monitoring
NOx, apart from affecting human health and the environment itself, has the potential to produce “secondary pollutants” such as ozone, smog, nitric acid, and particulate matter. Also, these pollutants have negative effects on health and the environment. NOx monitoring is an efficient way to prevent the accumulation of high levels of NOx as it helps detect the amount of NOX we are ...
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Monitoring Environmental Quality
' In order to determine the effectiveness of actions to improve environmental quality it is necessary to be able to measure relevant environmental parameters at a level of detail which is accurate enough to distinguish the anticipated changes. However, the establishment and maintenance of monitoring systems is time-consuming and expensive and therefore the scale of such systems needs to be kept ...
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CH4 Monitoring
Methane has a direct influence on climate change as well as an indirect effect on human health, plant yield, and productivity due to its role as an important precursor to ground-level ozone formation. Therefore, CH4 monitoring is an efficient way to detect the buildup of CH4 levels and take necessary actions. This article covers information on methane gas, its sources in the ambient air, ...
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NH3 Monitoring
Ammonia is a colorless, toxic, irritating gas with a pungent odor that is as a result released from decaying organic matter, including plants, animals, animal wastes, and fertilizer use. As a result, prolonged exposure of the NH3 can quickly deaden a person’s sense of smell, making the odor of NH3 an unreliable indicator of its presence. Hence, other means such as the use of NH3 monitors ...
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TVOC Monitoring
Total Volatile Organic Compounds (TVOC) are a group of compounds containing carbon that have a high vapor pressure present in the air. There are abundant VOC emitted from everyday activities among which some are colourless and some odourless and some are toxic. Therefore, TVOC monitoring is an efficient way to detect exposure to toxic VOCs. This article covers information on total volatile ...
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Methyl Mercaptan monitoring
Methyl mercaptan (CH3SH), also known as methanethiol, is a colourless, highly flammable, toxic gas with a distinct, strong unpleasant odour. Moreover, microbial degradation of organic matter releases methyl mercaptan. As a result, prolonged exposure of the CH3SH can quickly deaden a person’s sense of smell, making the odour of methyl mercaptan an unreliable indicator of its presence. Hence, ...
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H2S Monitoring
H2S is formed whenever elemental sulfur or sulfur-containing compounds come into contact with organic materials at high temperatures. Continuous or high-level exposure of the H2S can quickly deaden a person’s sense of smell, making the odour of H2S an unreliable indicator of its presence. Hence, other means such as hydrogen sulfide monitoring is a viable solution to provide adequate warning ...
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Carbon Monoxide Monitoring
Carbon monoxide, one of the most abundant pollutant gases. The gas is indetectable to humans as one can not see, smell, or taste. However, exposure to high levels of CO can cause CO poisoning leading to serious health issues, giving it the name “The Silent Killer.” CO monitoring is the most effective way to know if one is at risk of carbon monoxide exposure. Meanwhile, this article ...
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