Air Sampling Research Papers - Academia.edu (original) (raw)

Bisphenol A (BPA) is a toxic industrial chemical that affects the endocrine system even at low concentrations. A new method, based on capillary high-performance liquid chromatography/electrospray ionization tandem mass spectrometry... more

Bisphenol A (BPA) is a toxic industrial chemical that affects the endocrine system even at low concentrations. A new method, based on capillary high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (HPLC/ESI-MS/MS) analysis, has been developed to determine BPA in atmospheric samples. The method involves collection of air samples (typically 2 m3) on glass fiber filters, with ultrasonic extraction and sample concentration under vacuum before analysis. HPLC analysis was performed isocratically at a flow rate of 10 µL min−1 using a capillary reversed-phase column and MS/MS analysis in negative ion multiple reaction monitoring (MRM) mode, using BPA-d16 as internal standard. The present method provides linear response in the range 0.007–3.5 µg/filter (R2 > 0.999) and is characterized by high accuracy (mean bias 2%) and good reproducibility (mean RSD 5%). High sensitivity (LOD = 2 ng/m3 based on 2 m3 of air collected), specificity, and speed of the analysis make the present method suitable for routine determination of BPA in the atmosphere, both for ambient and personnel monitoring. Copyright © 2005 John Wiley & Sons, Ltd.

Aerobiologia 15: 9–18, 1999. © 1999 Kluwer Academic Publishers. Printed in the Netherlands. ... An evaluation of two methods used for microscopic analysis of airborne ... Melinda Sterling, Christine Rogers & Estelle Levetin* Faculty of... more

Aerobiologia 15: 9–18, 1999. © 1999 Kluwer Academic Publishers. Printed in the Netherlands. ... An evaluation of two methods used for microscopic analysis of airborne ... Melinda Sterling, Christine Rogers & Estelle Levetin* Faculty of Biological Science, University of ...

Austin CC (2004). Modulo-Griffon.

A closed chamber method (CC-method) using an infra-red gas analyzer (IRGA) for measuring soil respiration was examined. Two major factors which potentially cause errors: (i) volume of air sampled from the chamber; and (ii) measuring... more

A closed chamber method (CC-method) using an infra-red gas analyzer (IRGA) for measuring soil respiration was examined. Two major factors which potentially cause errors: (i) volume of air sampled from the chamber; and (ii) measuring period of time, were examined in laboratory experiments. Field measurements were also conducted with both the CC-method and the open-flow IRGA method (OF-method) throughout a

Ion chromatographic (IC) methods have been compared in order to achieve an optimal separation of fluoride, acetate and formate under various elution conditions on two formerly introduced analytical columns (i and ii) and a novel one... more

Ion chromatographic (IC) methods have been compared in order to achieve an optimal separation of fluoride, acetate and formate under various elution conditions on two formerly introduced analytical columns (i and ii) and a novel one (iii): (i) an IonPac AS14 (250 mm × 4 mm I.D.), (ii) Allsep A-2 (150 mm × 4.6mm I.D.), and (iii) an IC SI-50 4E (250 mm (length) × 4mm (internal diameter - I.D.)). The IC conditions for the separation of the anions concerned were optimized on the IC SI-50 4E column. A near baseline separation of these anions was attained on the IonPac AS14, whereas the peaks of fluoride and acetate could not be resolved on the Allsep A-2. A baseline separation for the three anions was achieved on the IC SI-50 4E column, when applying an eluent mixture of 3.2 mmol/L Na(2)CO(3) and 1.0 mmol/L NaHCO(3) with a flow rate of 1.0 mL/min. The highest precision of 1.7, 3.0 and 2.8% and the best limits of detection (LODs) of 0.014, 0.22 and 0.17 mg/L for fluoride, acetate and form...

Abstract: This paper evaluates the accuracy of the newly introduced ultra-portable olfactometer, Scentroid SM100 developed by IDES Canada Inc, with two techniques traditionally used for assessing ambient odours: Nasal Ranger instrument... more

Abstract: This paper evaluates the accuracy of the newly introduced ultra-portable olfactometer,
Scentroid SM100 developed by IDES Canada Inc, with two techniques traditionally used for
assessing ambient odours: Nasal Ranger instrument and a lung technique with the dynamic
olfactometry laboratory analysis of collected samples. A similar study was presented at the recent
NOSE 2012 odour conference [1], where the results indicated good correlation between Scentroid
SM100 and other techniques used for assessing odours: a) collection of the samples at the sources
and dispersion modeling analysis to predict off site odour concentrations and b) ambient sampling
using lung technique and odour panel evaluation by dynamic olfactometry. However, the study
was based on the data when the odour was in the range 90 ou to 3000 ou. At that time the low
ranges of the Scentroid SM100 was not studied; therefore this paper is to present data based on an
extensive study of the Scentroid SM100 when the odour concentration of ambient odour is in the
range of 2 ou to 100 ou. This time the results are compared with Nasal Ranger instrument and lung
technique used for collection of ambient samples and odour panel evaluation.

In this report we describe the results of astudy conducted to better estimate airbornemicroorganisms present in wastewater treatmentplants (WWTP) environments. Air samples weretaken with the Air Sampler MAS 100 impactor(Merck) at each... more

In this report we describe the results of astudy conducted to better estimate airbornemicroorganisms present in wastewater treatmentplants (WWTP) environments. Air samples weretaken with the Air Sampler MAS 100 impactor(Merck) at each stage of an activated-sludgeWWTP (pre-treatment, primary clarifiers,aeration basins and sludge processors), inorder to determine levels of contaminationaccording to work stations. Culture methodswere used to investigate heterotrophic platecount, moulds and yeasts, total and fecalcoliforms, Pseudomonas aeruginosa andspecies belonging to Mycobacteriumtuberculosis complex, whereas these lastmicroorganisms were also analysed by PolymeraseChain Reaction (PCR) methods. Statisticalanalysis showed that pretreatment and primaryclarifiers were the stages with the highestemission of bioaerosols, and that bioaerosolconcentration at each stage depended on windspeed and daily inflow at the WWTP. Lowconcentrations of P. aeruginosa werefound isolated at pretreatment and primaryclarifiers; however, species of M.tuberculosis complex were not detected at anystage of the treatment plant.