Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
A calibration chamber has been designed and employed for the simple and easy determination of uptake sampling rate (R) of volatile organic compounds (VOCs) from air using passive samplers. A flow of clean air was continuously spiked, at a constant VOC concentration, by the microinjection of a standard solution by means of a T-type tube. The developed system allowed the complete evaporation at room temperature of the standard solution in acetone and the air concentration of VOCs was easily controlled by the regulation of the clean air flow, the standard solution concentration and its flow. Active sampling was employed for monitoring the true concentration of the evaluated compounds inside the calibration chamber, using Tenax-filled desorption tubes and a low flow personal air sampling pump. Versatile, easy and rapid atmospheric monitor (VERAM) devices were employed for the passive sampling of benzene, toluene, ethylbenzene, xylenes, α-pinene, camphene, myrcene, p-cymene, and limonene from air. The R values obtained for the passive sampling of VOCs, using the developed calibration chamber, were in the range of 1.3-16.0mday in accordance to previous calibration studies performed for VERAM samplers. The developed calibration chamber provided a continuous flow with a constant concentration of the evaluated compounds that allowed the simultaneous deployment of several samplers for a rapid establishment of R for a passive sampler type and the easy comparison between different devices.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.scitotenv.2017.11.173 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Investigation of neutron stray fields close to the two meson targets of the PSI proton accelerator facility.
Radiat Prot Dosimetry
September 2025
Department of Radiation Safety and Security, Paul Scherrer Institute (PSI), Forschungsstrasse 111, 5232 Villigen, Switzerland.
The High-Intensity Proton Accelerator Facility at the Paul Scherrer Institute (PSI) accelerates protons to an energy of 590 MeV with currents up to 2.4 mA, i.e.
View Article and Find Full Text PDFFilter circuit for suppression of electric-field noise in Rydberg-atom experiments.
Rev Sci Instrum
September 2025
Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Rydberg atoms are widely employed in precision spectroscopy and quantum information science. To minimize atomic decoherence caused by the dc Stark effect, the electric field noise at the Rydberg atom location should be kept below ∼10 mV/cm. Here, we present a simple yet effective electronic circuit, referred to as a clamp switch, that allows one to realize such conditions.
View Article and Find Full Text PDFRing type furnace integrated into DAC chamber for stable and uniform sample heating up to 2000 K.
Rev Sci Instrum
September 2025
State Key Laboratory of High Pressure and Superhard Materials, Jilin University, Changchun, China.
The diamond anvil cell is a powerful tool for investigating material behavior under extreme pressure and temperature, but achieving efficient and uniform heating remains challenging. This study introduces a ring-type furnace integrated into a gasket with a metal-insulator-metal sandwich structure, using tantalum (Ta) for heating, tungsten (W) for electrodes, and mica-ceramic powder for insulation, enabling stable and uniform heating up to 2000 K. A calibration method combining thermocouple data and finite element simulations ensures accurate temperature measurement.
View Article and Find Full Text PDFThe "Aminometer" - a finger-sized prototype for total L-amino acid measurements from human serum.
Biosens Bioelectron
August 2025
Life Science Center, Vilnius University, Saulėtekio al. 7, LT-10257, Vilnius, Lithuania. Electronic address:
The total pool of blood's serum circulating L-amino acids (ΣAA) is an underused biomarker that integrates muscle protein turnover, nutritional status and metabolic disorders. Despite increasing clinical relevance, current methods for quantifying ΣAA, including colorimetry/fluorimetry and chromatography, are laboratory-bound, slow, and unsuitable for decentralized or extreme environments such as space missions. We report a self-contained, portable, calibration-free prototype device - Aminometer - for rapid quantitative analysis of ΣAA concentration in 7.
View Article and Find Full Text PDFImproving the accuracy of radiochromic film dosimetry in lung- and soft tissue-equivalent media in a dynamic phantom through dose-to-medium correction factors.
Phys Med Biol
September 2025
School of Science, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Melbourne, Victoria, 3001, AUSTRALIA.
The accuracy of film dosimetry in heterogeneous phantoms is diminished by several factors: (i) the perturbation of the beam by the film in low-density media, (ii) the calibration of film in terms of dose-to-water versus dose-to-medium reported by treatment planning systems (TPS), and (iii) the motion of the phantom as it is irradiated, which is not resolved in the TPS dose calculation. The Australian Clinical Dosimetry Service is currently developing a film-based end-to-end audit for motion management encompassing lung and liver treatment sites. The purpose of this work was to derive spatially-resolved correction factors to improve the accuracy of audit film measurements, and test the efficacy of these factors in practice.
View Article and Find Full Text PDF