Comparison of Indoor Air Quality Measurement by Using Direct Detection Apparatus and Standard Methods

Kung, Pei Yi; Wang, Yi Tun; Chiu, Jui Chi; Hsu, Yi Chyun; Wu, Ting; Shen, Yun; Wen, Shaw Bing

doi:10.4028/www.scientific.net/amr.230-232.905

Cited by 4 publications

(3 citation statements)

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“…Concentrations of PM 10 and PM 2.5 were determined using the β-ray decay method. The measurements of indoor air quality by using handy digital apparatuses and the Taiwan EPA standard methods have been compared by Kung et al (2011).…”

Section: Iaq Investigationmentioning

confidence: 99%

Characterization of Indoor-Air Bioaerosols in Southern Taiwan

Hsu

Kung

et al. 2012

Aerosol Air Qual. Res.

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This study investigated indoor air quality (IAQ) at 39 public sites in southern Taiwan including hospitals, schools, office buildings, hypermarkets, libraries, railway stations, theaters, etc. Indoor air quality was preliminarily assessed using handy digital apparatus. Items detected include carbon dioxide (CO 2 ), carbon monoxide (CO), formaldehyde (HCHO), total volatile organic compounds (TVOCs), total bacteria counts (TBC), total fungi counts (TFC), PM 10 , PM 2.5 , ozone (O 3 ) and temperature. Based on the results of walk-through detection, the spatial distribution of indoor air contaminants was further measured over a 24 hour period using the EPA standard method. Major indoor air pollutants were found to include CO 2 , TBC, and TFC. The measured CO 2 concentrations ranged between 438 and 1527 ppm, and only 38.9% of them met the Taiwan EPA suggested threshold of 600 ppm. In the schools and hospitals (Category 1), the measured TFC and TBC concentrations ranged from 62 to TNTC CFU/m 3 and from 196 to 4875 CFU/m 3 , respectively. 33% TFC and 83% TBC concentrations exceeded the suggested threshold, and CO 2 concentrations were moderately correlated with TBC levels. In a case study of hospital bioaerosols, high TBC and TFC levels were effectively lowered through disinfectant housekeeping as well as ClO 2 spray. Three filamentous fungus genera were identified as Cladosporium perangustum, Cladosporium tenuissimum, and Fusarium incarnatum from outdoor samples with high TFC concentrations.

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Section: Iaq Investigationmentioning

confidence: 99%

Characterization of Indoor-Air Bioaerosols in Southern Taiwan

Hsu

Kung

et al. 2012

Aerosol Air Qual. Res.

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“…IAQ hot-spot locations were screened at each public site through walk-through detection in the first stage, and the measurements of indoor air pollutants were continuously monitored for 24 hour or sampled for lab analysis according to Taiwan EPA standard methods [3]. The detailed procedures of IAQ investigation can be referred to Wang et al [4], and the employed measurement methods and utilized detection apparatus or instruments were summarized in Kung et al [5]. IAQ measurements include CO 2 , CO, HCHO, TVOCs, bacteria, fungi, PM 10 , PM 2.5 , O 3 and temperature, which were conducted during year 2010 and 2011.…”

Section: Investigation Methodsmentioning

confidence: 99%

Indoor Air Quality Investigation of Public Sites in Isolated Islands within Taiwan Strait

Hsien

Wang

Hsu

et al. 2012

AMM

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The selected 21 public sites for indoor air quality (IAQ) investigation located at Penghu and Kinmen Islands (Taiwan). IAQ measurements include CO2, CO, HCHO, TVOCs, bacteria, fungi, PM10, PM2.5, O3 and temperature, which were conducted during year 2010 and 2011. The results showed that the concentrations of CO, HCHO, PM10 and PM2.5 were below Taiwan EPA’s suggested IAQ threshold levels at all public sites. CO2 concentrations at hospitals and school are all exceeding category 1 threshold of 600 ppm. Besides, the levels of O3 and bacteria for hospitals and fungi for schools were all higher than the suggested IAQ threshold levels. One supermarket was found exceeding the suggested IAQ threshold levels on TVOCs and CO2. The theater was found exceeding the suggested bacteria threshold. This study discovered that the high CO2, bacteria and fungi levels occurred at various public sites. Accordingly, the regulated strategy of crowd control and air conditioning management was required for a healthy indoor environment.

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“…A detailed explanation of the measuring equipment is shown in Table 2. Overall, the above design of direct detection apparatus is based on the principle of infrared, laser, or electrochemical methods, and the direct detection data are reliable [64].…”

Section: Air Pollutants and Microclimate Measurementmentioning

confidence: 99%

Exposure of Elderly People to Indoor Air Pollutants in Wanxia Nursing Home

Zong,

Tian,

Cao

et al. 2023

Buildings

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The elderly residing in nursing homes are typically more advanced in age, have more health issues, and spend more time indoors than other elderly people. This study explored the indoor air quality in the Wanxia nursing home, the largest private nursing home in Chengdu, China, based on long-term measurement data. Air pollutant sensors measured the level of air pollution in the Wanxia nursing home from March 2021 to February 2022. This study obtained several important results: (1) The indoor air quality index (IAQI) of the Wanxia nursing home was at a low pollution level in spring, summer, and autumn, and at a moderate pollution level in winter. PM concentration played the most important role in determining indoor air quality; (2) During winter, the 24 h mean indoor concentrations of PM2.5 and PM10 were close to or even exceeded the standard limits. During winter and summer nights, indoor CO2 levels were very close to or greater than 1000 ppm. During spring and summer nights, the indoor TVOC concentrations exceeded the limit (0.45 mg/m3); (3) Apart from HCHO concentrations in autumn, the levels of other indoor air pollutants were significantly influenced by their outdoor levels. In addition, the seasonal indoor/outdoor (I/O) ratios of CO2 and TVOCs exceeded 1; and (4) Indoor CO2 levels were closely related to indoor temperature (Ta) and relative humidity (RH) in each season. PM10 concentration correlated with Ta and RH in summer, while PM2.5 concentration did not correlate with Ta and RH in winter. The indoor TVOC level positively correlated with RH. Lastly, the indoor HCHO level was minimally influenced by changes in Ta and RH. Due to the above results, this study proposes targeted strategies for improving indoor air quality in nursing homes.

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Comparison of Indoor Air Quality Measurement by Using Direct Detection Apparatus and Standard Methods

Cited by 4 publications

References 0 publications

Characterization of Indoor-Air Bioaerosols in Southern Taiwan

Characterization of Indoor-Air Bioaerosols in Southern Taiwan

Indoor Air Quality Investigation of Public Sites in Isolated Islands within Taiwan Strait

Exposure of Elderly People to Indoor Air Pollutants in Wanxia Nursing Home

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