A Downhole Passive Sampling System To Avoid Bias and Error from Groundwater Sample Handling

2010 ◽  
Vol 44 (13) ◽  
pp. 4917-4923 ◽  
Author(s):  
Sanford L. Britt ◽  
Beth L. Parker ◽  
John A. Cherry
Keyword(s):  
Passive Sampling ◽  
Groundwater Sample ◽  
Sampling System ◽  
Sample Handling

A new all-season passive sampling system for monitoring NO2 in air

1999 ◽  
Vol 3 (6) ◽  
pp. 338-345 ◽  
Author(s):  
Hongmao Tang ◽  
Thomas Lau ◽  
Bernie Brassard ◽  
Walter Cool
Keyword(s):  
Passive Sampling ◽  
Sampling System

Diffusional behaviour of metals in a passive sampling system for monitoring aquatic pollution

2001 ◽  
Vol 3 (6) ◽  
pp. 639-645 ◽  
Author(s):  
Lena Björklund Persson ◽  
Gregory M. Morrison ◽  
Jens-Uwe Friemann ◽  
Jenny Kingston ◽  
Graham Mills ◽  
...  
Keyword(s):  
Passive Sampling ◽  
Aquatic Pollution ◽  
Sampling System

Development and Calibration of a Resin-Based Passive Sampling System for Monitoring Persistent Organic Pollutants in the Atmosphere

2003 ◽  
Vol 37 (7) ◽  
pp. 1352-1359 ◽  
Author(s):  
Frank Wania ◽  
Li Shen ◽  
Ying Duan Lei ◽  
Camilla Teixeira ◽  
Derek C. G. Muir
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Passive Sampling ◽  
Sampling System

Development of a novel passive sampling system for the time-averaged measurement of a range of organic pollutants in aquatic environments

2000 ◽  
Vol 2 (5) ◽  
pp. 487-495 ◽  
Author(s):  
Jenny K. Kingston ◽  
Richard Greenwood ◽  
Graham A. Mills ◽  
Gregory M. Morrison ◽  
Lena Björklund Persson
Keyword(s):  
Organic Pollutants ◽  
Passive Sampling ◽  
Aquatic Environments ◽  
Sampling System

Performance of an in situ passive sampling system for metals in stormwater

2002 ◽  
Vol 4 (2) ◽  
pp. 258-262 ◽  
Author(s):  
Lena Björklund Blom ◽  
Gregory M. Morrison ◽  
Jenny Kingston ◽  
Graham A. Mills ◽  
Richard Greenwood ◽  
...  
Keyword(s):  
Passive Sampling ◽  
Sampling System

scholarly journals A New All-Season Passive Sampling System for Monitoring H2S in Air

2002 ◽  
Vol 2 ◽  
pp. 155-168 ◽  
Author(s):  
Hongmao Tang ◽  
James Sandeluk ◽  
Linda Lin ◽  
J. WIlliam Lown
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Passive Sampling ◽  
Exposure Period ◽  
Field Studies ◽  
Sulfur Compounds ◽  
Sampling System ◽  
Filter Pack ◽  
Sampling Systems ◽  
Significant Interference

A new Maxxam All-Season Passive Sampling system for monitoring H2S in air has been developed. This passive sampling system employs the same approaches as the Maxxam All-Season Passive Sampling Systems for monitoring SO2, NO2, and O3reported previously. This system has been extensively tested in the lab (temperature from -20 to 20°C, relative humidity from 30 to 84%, and wind speed from 0.5 to 150 cm/s) and validated in field studies. Comparing measurements obtained with the use of the new passive sampling system with equivalent measurement with the use of an active filter pack H2S sampler yielded an accuracy of greater than 85%. The new H2S passive sampling system can be used to measure ambient H2S concentrations ranging from 0.02 to 7 ppb based on a 1-month exposure period. There is no significant interference found from other sulfur compounds in air. This system has been used in many air monitoring projects.

scholarly journals Introduction to Maxxam All-Season Passive Sampling System and Principles of Proper Use of Passive Samplers in the Field Study

2001 ◽  
Vol 1 ◽  
pp. 463-474 ◽  
Author(s):  
Hongmao Tang
Keyword(s):  
Air Pollution ◽  
Field Study ◽  
Passive Sampling ◽  
Detection Limits ◽  
Weather Conditions ◽  
Passive Samplers ◽  
Sampling System ◽  
Pollution Detection

Maxxam all-season passive sampling system (PASS) is introduced in this paper. The PASS can be used to quantitatively and accurately monitor SO2, NO2, O3, and H2S in air in all weather conditions with flexible exposure times from several hours to several months. The air pollution detection limits of PASS are very low. They can be from sub ppb to ppt levels. The principles of proper use of passive samplers in the field study are discussed by using the PASS as an example.

scholarly journals A Method for Collecting Atmospheric Microbial Samples From Set Altitudes for Use With Next-Generation Sequencing Techniques to Characterize Communities

2018 ◽  
Vol 11 ◽  
pp. 117862211878887 ◽  
Author(s):  
Allison M Spring ◽  
Kathryn M Docherty ◽  
Kenneth D Domingue ◽  
Thomas V Kerber ◽  
Margaret M Mooney ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Ribosomal Rna ◽  
Passive Sampling ◽  
Negative Control ◽  
Next Generation ◽  
Airborne Microorganisms ◽  
Sampling System ◽  
Health Related ◽  
Microbial Samples ◽  
Generation Sequencing

Dispersal of airborne microorganisms is an important ecological process, resulting in the distribution of bacteria to all habitats on Earth. Investigation of this process is limited by the ability to collect uncontaminated high-altitude microbial samples for use with next-generation sequencing approaches. Here, we describe the design of a Remote Airborne Microbial Passive sampling system. Troubleshooting experiments demonstrate that the samplers collect adequate DNA for bacterial 16S rRNA (ribosomal RNA) amplicon–based Mi-Seq sequencing at 2 and 150 m from the ground. When samplers are closed, they retain only a low number of sequences, and may be used as a negative control. We also demonstrate that the optimal amount of collection dishes to include in the sampler is 8, and that freezing collection dishes at −80°C is an alternative to immediate DNA extraction. Samplers may be used to address a variety of ecological and human health–related questions.

scholarly journals Passive Sampling of Gaseous Elemental Mercury Based on a Composite TiO2NP/AuNP Layer

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 798 ◽  
Author(s):  
Antonella Macagnano ◽  
Paolo Papa ◽  
Joshua Avossa ◽  
Viviana Perri ◽  
Marcello Marelli ◽  
...  
Keyword(s):  
Passive Sampling ◽  
Low Cost ◽  
Morphological Characteristics ◽  
Elemental Mercury ◽  
Blue Shift ◽  
Mercury Vapor ◽  
Titania Nanoparticles ◽  
Sampling System ◽  
Gaseous Elemental Mercury ◽  
Low Cost Strategy

Passive sampling systems (PASs) are a low cost strategy to quantify Hg levels in air over both different environmental locations and time periods of few hours to weeks/months. For this reason, novel nanostructured materials have been designed and developed. They consist of an adsorbent layer made of titania nanoparticles (TiO2NPs, ≤25 nm diameter) finely decorated with gold nanoparticles. The TiO2NPs functionalization occurred for the photocatalytic properties of titania-anatase when UV-irradiated in an aqueous solution containing HAuCl4. The resulting nanostructured suspension was deposited by drop-casting on a thin quartz slices, dried and then incorporated into a common axial sampler to be investigated as a potential PAS device. The morphological characteristics of the sample were studied by High-Resolution Transmission Electron Microscopy, Atomic Force Microscopy, and Optical Microscopy. UV-Vis spectra showed a blue shift of the membrane when exposed to Hg0 vapors. The adsorbed mercury was thermally desorbed for a few minutes, and then quantified by a mercury vapor analyzer. Such a sampling system reported an efficiency of adsorption that was equal to ≈95%. Temperature and relative humidity only mildly affected the membrane performances. These structures seem to be promising candidates for mercury samplers, due to both the strong affinity of gold with Hg, and the wide adsorbing surface.

A new passive sampling system for monitoring SO2 in the atmosphere

1997 ◽  
Vol 1 (5) ◽  
pp. 307-314 ◽  
Author(s):  
Hongmao Tang ◽  
Bernie Brassard ◽  
Ray Brassard ◽  
Eric Peake
Keyword(s):  
Passive Sampling ◽  
Sampling System
Sign in / Sign up

Export Citation Format

Share Document