Analysis of Concentration Characteristics of Atmospheric PCBs in Anseong Area Using Low Volume Air Sampler

2019 ◽  
Vol 20 (3) ◽  
pp. 160-168
Author(s):  
Man-Young Chun
Keyword(s):  
Air Sampler ◽  
Low Volume

scholarly journals PERBANDINGAN METODE SAMPLING KUALITAS UDARA: HIGH VOLUME AIR SAMPLER (HVAS) DAN LOW VOLUME AIR SAMPLER (LVAS)

Jurnal Ecolab ◽  
2018 ◽  
Vol 12 (2) ◽  
pp. 83-92
Author(s):  
Isfi Rohmah ◽  
◽  
Rita Mukhtar ◽  
Retno Puji Lestari
Keyword(s):  
High Volume ◽  
Air Sampler ◽  
Low Volume

Determination of Atmospheric Trace Elements by Atomic Absorption Spectroscopy

1970 ◽  
Vol 24 (3) ◽  
pp. 371-374 ◽  
Author(s):  
Jae Y. Hwang ◽  
Fredric J. Feldman
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Preparation Technique ◽  
Metallic Elements ◽  
Air Samples ◽  
Air Sampler ◽  
Sample Preparation Technique ◽  
Low Volume

Trace metallic elements of Cr, Ni, Mn, and Cu in the atmospheric samples were determined by atomic absorption spectroscopy. Organic membranes coupled with a low volume air sampler were utilized to collect air samples since conventional glass fiber filters were found to be unsuitable for this purpose. A new sample preparation technique and flame conditions were discussed to improve the accuracy of the analysis.

Comparison of high-volume air sampling equipment for viral aerosol sampling during emergency response

2014 ◽  
Vol 12 (2) ◽  
pp. 161 ◽  
Author(s):  
Casey Cooper, MS, MBA, CIH ◽  
Jeremy Slagley, PhD, CIH, CSP ◽  
James Lohaus Jr, PhD ◽  
Elizabeth Escamilla, MS ◽  
Christopher Bliss, BSc, MSc ◽  
...  
Keyword(s):  
Emergency Response ◽  
Plaque Assay ◽  
Test Chamber ◽  
Agar Plate ◽  
High Volume ◽  
Low Flow ◽  
Aerosol Sampling ◽  
Air Sampler ◽  
Low Concentrations ◽  
Low Volume

Objective: This study compared the performance of two high-volume bioaerosol air samplers for viable virus to an accepted standard low-volume sampler. In typical bioaerosol emergency response scenarios, high-volume sampling is essential for the low infective concentrations and large air volumes involved.Design: Two high-volume air samplers (XMX/2LMIL and DFU-1000) were evaluated alongside a low-volume sample (BioSampler). Low and high concentrations (9.3-93.2 agent containing particles per liter of air [ACPLA]) of male-specific coliphage 2 (MS2) virus were released into a 12 m3 aerosol test chamber and collected using the air samplers. The collection media from the samplers were then processed and viable virus was assessed via plaque assay. Setting: Aerosol test chamber.Subjects, participants: None.Interventions: Collection media and flow rate were modified for the XMX/2L-MIL sampler for viable analysis.Main outcome measures: Concentration estimates in units of plaque forming units per liter of air (PFU/liter) assessed by the samplers as compared to the levels inside the chamber as evaluated with a slit to agar plate in units of ACPLA. Comparison was made via one-way analysis of variance. Results: Both the XMX/2L-MIL and DFU-1000 achieved collection effectiveness equal to or greater than the low-volume air sampler for the evaluated MS2 concentrations. The XMX/2L-MIL reliably collected quantifiable low concentrations of MS2, but the DFU-1000 was unable to do so.Conclusions: For emergency response to suspected bioaerosols, the evaluated high-volume samplers are as effective as the standard low-flow sampler and should be considered in conducting a health risk assessment. If low concentrations are expected, then high-flow samplers using liquid collection are preferred.

scholarly journals Analisis Konsentrasi PM2,5, CO, dan CO2, serta Laju Konsumsi Bahan Bakar Biopelet Sekam Padi dan Jerami pada Kompor Biomassa

2021 ◽  
Vol 19 (2) ◽  
pp. 201-210
Author(s):  
Fadjar Goembira ◽  
Debby Maurine Aristi ◽  
Defri Nofriadi ◽  
Nilda Tri Putri
Keyword(s):  
Air Quality ◽  
Fuel Consumption ◽  
Rice Straw ◽  
Rice Husk ◽  
Water Boiling Test ◽  
Air Sampler ◽  
Hot Start ◽  
Micron Size ◽  
Low Volume ◽  
Three Phases

Penelitian ini dilakukan untuk menganalisis konsentrasi PM2.5, CO dan CO2 dalam ruangan ketika dilakukan penggunaan bahan bakar biopelet pada sebuah kompor biomassa, serta menghitung laju konsumsi bahan bakar tesebut. Pengujian menggunakan metode water boiling test (WBT) untuk mensimulasikan proses memasak yang terbagi ke dalam 3 fase, yaitu cold start (CS)/fase dingin, hot start (HS)/fase panas, dan simmering (SM)/fase mendidih. Biopelet dibuat dari limbah sekam dan jerami padi. Pengukuran PM2,5 dilakukan menggunakan low volume air sampler (LVS) yang dilengkapi dengan elutriator untuk memisahkan partikel berukuran di atas 2,5 mikron dan filter fiberglass untuk menangkap partikel berukuran kurang dari 2,5 mikron pada kecepatan aliran udara 3,5 liter per menit. Sedangkan pengukuran CO dan CO2 menggunakan Portable Air Quality Monitor. Didapatkan konsentrasi PM2,5 biopelet sekam padi pada fase CS, HS, dan SM berturut-turut 33,13,30,81, dan 24,76 μg/Nm3, sedangkan untuk biopelet jerami padi diperoleh 23,29, 29,98, dan 30,42 μg/Nm3.Terkait konsentrasi CO, pada ketiga fase berturut-turut untuk biopelet sekam padi yaitu 5,29, 5,14, dan 6,09 ppm, sedangkan untuk biopelet jerami padi didapatkan 6,13, 5,86, dan 5,67 ppm. Terakhir, pengukuran konsentrasi CO2 biopelet sekam padi yaitu 436,74, 451,71, dan 472,82 ppm, sedangkan pada biopelet jerami padi terukur 419,87, 417,93, dan 453,43 ppm, pada ketiga fase berturut-turut. Konsentrasi PM2,5, gas CO dan CO2 biopelet masih memenuhi baku mutu udara indoor sesuai dengan PERMENKES/1077/2011. Rasio CO/CO2 berada di bawah nilai 0,02 yang menunjukkan pembakaran bahan bakar biopelet menghasilkan karbon monoksida yang kecil sehingga terjadi pembakaran sempurna. Laju konsumsi bahan bakar biopelet lebih kecil dibandingkan jika digunakan biomassa yang belum diolah menjadi biopelet. ABSTRACTThis research was conducted to analyse indoor PM2.5, CO dan CO2 concentrations during the use of biopellet fuel in a biomass stove, and to calculate the fuel consumption rate. Water boiling test (WBT) was used to simulate cooking activities, which comprises of three phases, i.e., cold start (CS), hot start (HS), and simmering (SM). The biopellet was made from rice husk and straw wastes. PM2.5 were measured by using a low volume air sampler (LVAS) that was equipped with an elutriator to separate particulates with more than 2.5-micron size and a fiberglass filter to trap particulates with less than 2.5-micron size at air flow rate of 3.5 liter per minute. Meanwhile, a portable air quality monitor was used to measure CO dan CO2. It was found that PM2.5 concentrations for rice husk biopellet during CS, HS, and SM were, respectively, 33.13,30.81, and 24.76 μg/Nm3. While those for rice straw biopellet were 23.29, 29.98, and 30.42 μg/Nm3. Regarding CO concentrations during the three phases for rice husk biopellet were, respectively, 5.29, 5.14, and 6.09 ppm, whilst for the rice straw biopellet the concentrations were 6.13, 5.86, and 5.67 ppm. Lastly, the CO2 measurements for rice husk biopellet were 436.74, 451.71, and 472.82 ppm, while those for rice husk biopellet were 419.87, 417.93, and 453.43 ppm, during the three phases correspondingly. All PM2.5, CO and CO2 gas concentrations still met indoor air quality standard, in accordance with Minister of Health Regulation Number 1077/2011. Moreover, the CO/CO2 ratios were below 0.02, which indicates that the combustion of the biopellet fuels emited small amount of carbon monoxide, thus, perfect combustion were achieved. The biopellet fuel consumption rates were smaller than those of virgin biomasses that had not been converted into biopellet

scholarly journals Development of A Low-Cost Simultaneous Low Volume Air Sampler Controlled with Sonic Venturi

2021 ◽  
Vol 15 (1) ◽  
pp. 52-67
Author(s):  
Zikrilla Bobamuratovich Alimov ◽  
Hikaru Kusakari ◽  
Tomoaki Okuda
Keyword(s):  
Low Cost ◽  
Air Sampler ◽  
Low Volume

475: Clinically Insignificant Prostate Cancer - Can we Reliable Predict Low Volume and Low Grade Prostate Cancer Preoperatively?

2006 ◽  
Vol 175 (4S) ◽  
pp. 154-154
Author(s):  
Michael Alschibaja ◽  
Joerg Massmann ◽  
Armin Funk ◽  
Heiner Van Randenborgh ◽  
Rudolf Hartung ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Low Grade ◽  
Low Volume ◽  
Insignificant Prostate Cancer
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