scholarly journals DETERMINATION OF BTEX CONCENTRATION USING PASSIVE SAMPLERS IN A HEAVY TRAFFIC AREA OF JAKARTA, INDONESIA

2020 ◽  
Vol 19 (76) ◽  
Author(s):  
Adyati Pradini Yudison
Keyword(s):  
Heavy Traffic ◽  
Passive Samplers ◽  
Traffic Area

scholarly journals Effects of room airflow on accurate determination of PUF-PAS sampling rates in the indoor environment

2018 ◽  
Vol 20 (5) ◽  
pp. 757-766 ◽  
Author(s):  
Nicholas J. Herkert ◽  
Keri C. Hornbuckle
Keyword(s):  
Indoor Air ◽  
Indoor Environment ◽  
Accurate Determination ◽  
Passive Samplers ◽  
Air Toxics ◽  
Precise Interpretation

Accurate and precise interpretation of concentrations from polyurethane passive samplers (PUF-PAS) is important as more studies show elevated concentrations of PCBs and other semivolatile air toxics in indoor air of schools and homes.

scholarly journals The Use of Amberlite Adsorbents for Green Chromatography Determination of Volatile Organic Compounds in Air

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Luis Juan-Peiró ◽  
Anne Bernhammer ◽  
Agustin Pastor ◽  
Miguel de la Guardia
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Direct Determination ◽  
Direct Analysis ◽  
Passive Samplers ◽  
Sample Treatment ◽  
Filling Material ◽  
Chromatography Analysis ◽  
Volatile Organic

Passive samplers have been widely used for volatile organic compounds determination. Following the green chemistry tendency of the direct determination of adsorbed compounds in membrane-based devices through using head space direct chromatography analysis, this work has evaluated the use of Amberlite XAD-2, XAD-4, and XAD-16 adsorbents as a filling material for passive samplers. Direct analysis of the membranes by HS-GC-MS involves a solvent-free method avoiding any sample treatment. For exposed membranes, recoveries ranged from 10% to 203%, depending on the compound and adsorbent used. The limit of the detection values ranged from 1 to 140 ng per sampler. Acceptable precision and sensitivity levels were obtained for the XAD resins assayed.

scholarly journals Monitoring and flux determination of trace metals in rivers of the Seversky Donets basin (Ukraine) using DGT passive samplers

2011 ◽  
Vol 65 (6) ◽  
pp. 1715-1725 ◽  
Author(s):  
Yuliya Vystavna ◽  
Frédéric Huneau ◽  
Mikael Motelica-Heino ◽  
Philippe Le Coustumer ◽  
Yuri Vergeles ◽  
...  
Keyword(s):  
Trace Metals ◽  
Passive Samplers ◽  
Donets Basin ◽  
Flux Determination

scholarly journals Determination of PCB fluxes from Indiana Harbor and Ship Canal using dual-deployed air and water passive samplers

2019 ◽  
Vol 244 ◽  
pp. 469-476 ◽  
Author(s):  
Andres Martinez ◽  
Andrew M. Awad ◽  
Nicholas J. Herkert ◽  
Keri C. Hornbuckle
Keyword(s):  
Passive Samplers

scholarly journals Determining NO2 immission levels in a conflicted area: Riobamba, Ecuador

2019 ◽  
Vol 28 (3) ◽  
pp. 465-475
Author(s):  
Marcel Paredes ◽  
Dayana Auqui ◽  
David Idrovo ◽  
Rafaela Viteri
Keyword(s):  
Nitrogen Dioxide ◽  
Traffic Emissions ◽  
Passive Samplers ◽  
Vehicular Traffic ◽  
The Relationship

Riobamba has areas with high vehicular influence. For the determination of nitrogen dioxide concentrations, passive samplers were used, which were placed at points throughout the domain. The concentrations obtained in the field were interpolated with the information generated with the model traffic emissions software, estimating the relationship between vehicular traffic and the presence of gas. Allow to know the amount of pollutants that breathe about 250 pedestrians on average in the area.

scholarly journals ANÁLISE DOS POLUENTES ATMOSFÉRICOS NO2 E O3 VIA AMOSTRADORES PASSIVOS DE BAIXO CUSTO

e-xacta ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 29
Author(s):  
Danielle Cristine Miranda ◽  
Gabriel Campos Ferreira ◽  
Larissa Domingues Barbosa ◽  
Nara Luíza Andrade Pereira ◽  
Tatiany Ciríaco Ribeiro ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Data Analysis ◽  
Low Cost ◽  
Passive Samplers ◽  
Optimal Region ◽  
Paper Filter ◽  
Petri Dishes ◽  
Absorber Solution ◽  
The University

<p><em>O uso de equipamentos que monitorem a concentração de poluentes pode contribuir para prevenção de possíveis danos à saúde humana. Ess</em><em>e trabalho consiste no desenvolvimento de amostradores passivos de baixo custo para a determinação dos poluentes NO<sub>2</sub> e O<sub>3</sub> no campus Alto Paraopeba, através da análise fatorial e superfície de resposta. Os amostradores foram construídos em placas de Petri com filtros de papel contendo diferentes soluções absorvedoras para cada tipo de gás monitorado. Os amostradores de NO<sub>2</sub> foram expostos no refeitório da Universidade e os amostradores de O<sub>3</sub> foram expostos na sala de máquinas fotocopiadoras. Nos amostradores foram usadas diferentes quantidades de solução absorvedora e, também, diferentes tempos de exposição. Os resultados mostraram que a melhor condição para o NO<sub>2</sub> foi obtida com 4,6 mL de solução absorvedora e no tempo de 68 horas de exposição. Nessas condições, a concentração de NO<sub>2</sub> no Restaurante Universitário foi de 10,5 µg/m<sup>3</sup>. Para o ozônio, as concentrações variaram entre 4,2 µg/m<sup>3</sup> e 40 µg/m<sup>3</sup>, e a melhor condição (3 mL de solução absorvedora e tempo de 77 horas) está localizada no ponto sela e não na região ótima do gráfico. Isso ocorre devido ao fato do ozônio se decompor rapidamente a oxigênio.</em> <em>Os amostradores passivos apresentaram resultados satisfatórios e recomenda-se seu uso como uma alternativa de baixo custo para o monitoramento de NO<sub>2</sub> e O<sub>3</sub> no Restaurante Universitário e sala de Fotocopiadoras.  </em></p><p><em>ABSTRACT</em></p><em>The use of equipment that monitors the concentration of pollutants can contribute to the prevention of possible damages to human health. This work is to develop inexpensive passive samplers for the determination of NO<sub>2</sub> and O<sub>3</sub> pollution in the campus Alto Paraopeba beyond the optimization of analytical methods by software that provides a complete environment for data analysis; by factor analysis and response surface generated by it. The samplers were constructed on Petri dishes with paper filter containing different absorbing solutions according to each monitored gas. The samplers were exposed to NO<sub>2</sub> at university restaurant and others samplers were exposed to O<sub>3</sub> at the photocopier room of the campus. In samplers were used different amounts of absorber solution and also different exposure times. The results showed that the best condition for NO<sub>2</sub> was obtained with 4.6 mL of absorbing solution in time of 68 hours exposure. Under these conditions, the concentration of NO<sub>2</sub> in the university restaurant was 10.5 µg/m<sup>3</sup>. For ozone, the concentrations ranged from 4.2 µg/m<sup>3</sup> and 40 µg/m<sup>3</sup>, and the best condition (3 mL absorbing solution and time of 77 hours) is located at saddle point and not at the optimal region of the graph. This is because ozone has rapidly decomposes to oxygen. Passive samplers presented satisfactory results and it is recommended to use them as a low cost alternative for the monitoring of NO<sub>2</sub> and O<sub>3</sub> in the University Restaurant and Photocopiers room.</em>

The Isotope-Dilution Determination of Platinum in Soil by Inductively Coupled Plasma Mass Spectrometry

2000 ◽  
Vol 65 (12) ◽  
pp. 1875-1887 ◽  
Author(s):  
Ivan Trešl ◽  
Oto Mestek ◽  
Miloslav Suchánek
Keyword(s):  
Inductively Coupled Plasma ◽  
Heavy Traffic ◽  
Standard Addition ◽  
Standard Uncertainty ◽  
Ratio Measurement ◽  
Inductively Coupled ◽  
The Road ◽  
The Matrix ◽  
Main Component

A method of the determination of trace amounts of platinum in soils has been developed and validated. Samples were ignited, spiked by 198Pt and decomposed by acid digestion (HF-HClO4, HCl-HNO3). Platinum was separated from the matrix by tellurium coprecipitation (recovery 55-87%) and its content was calculated by the (194Pt + 195Pt + 196Pt)/198Pt ratio measurement. In spite of the separation step (hafnium and tungsten recovery below 1%), residual spectral interference caused by HfO+ ions was observed. This interference as well as that of 198Hg were removed by mathematical correction. Accuracy of the method was confirmed by analysis of certified reference material and by the standard addition method. Detection limit of the method was 0.08 ng g-1 Pt. It was found out that the main component of the standard uncertainty of results was sampling uncertainty. Analysis of soil samples taken in the neighbourhood of Hřensko (Northern Bohemia) showed high platinum contents near the road with heavy traffic.

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