• 한국환경교육학회지:환경교육
• /
• 제11권2호
• /
• pp.252-261
• /
• 1998

Since 1980's during which environmental pollution became serious enough to urge various types of environmental educations in many areas. But, most emphasis has been put on theoretical education. Even field education training mostly focused on water pollution. Therefore, simple air pollution monitoring system was needed for better field education in air pollution. In this study, we evaluated Passive Sampler as an useful tool for teaching air pollution in field. Students have found passive sampler very effective tool. Recent comparative study of auto-monitoring and passive sampler networks suggested a potential use of passive sampler as an useful tool for environmental education. In this study, the correlation between two sets of values appears very high judging from the regression slope of 0.92 and correlation coefficient of 0.91 However, inexpensive Passive sampler with easy-to-operate colorimeter, has not been used in environmental education partially because large scale fluctuation in time and space characteristic to air pollution has been overlooked so that the sampler has not been tested for an effective educational tool. Passive sampler certainly deserves further in depth research as an effective air monitoring system, and better attention to its usefulness to teach students and public.

• 한국환경과학회지
• /
• 제16권8호
• /
• pp.1001-1009
• /
• 2007

Passive sampler is a simple and cost-effective measuring equipment for ambient and indoor air pollution. We studied the performance of a short term (1 hour mean concentration) ozone passive sampler which was coated with a colorant (indigo carmine) to a filter substrate. Acetone and sulfamic acid added ozone passive sampler was investigated to measure short term mean ozone concentration. Ozone response and interference of criteria air pollutant($SO_2,\;NO_2$, CO) on a short term ozone passive sampler was tested through experimental chamber. The results show sulfamic acid added passive ozone sampler have good response in ozone exposure. Interference of $NO_2$ gas is larger than other two criteria gases.

• 한국대기환경학회지
• /
• 제22권6호
• /
• pp.904-911
• /
• 2006

Passive sampler is simple and inexpensive measuring equipment for air pollution. In this study we developed colorimetric ozone passive sampler which was coated a colorimetric reagent to a filter substrate. Interference of criteria all pollutant ($SO_2,\;NO_2,\;CO$) on ozone passive sampler was investigated through experimental chamber. Field measurement of developed ozone passive samper was compared automatic sampler result in Suwon area. The results shows interference of $SO_2$ gas is larger than other gases. Developed passive sampler can be roughly applicable to wind speed range from 0.8 to 3.3 m/s, temperature range from 3.9 to $27.5^{\circ}C$ and relative humidity range from 48 to 84%.

• 한국대기환경학회지
• /
• 제21권6호
• /
• pp.593-603
• /
• 2005

Passive sampler using 4-amino-3-hydrazino-5-mercapto-1, 2, 4-triazole (AHMT) was developed to determine formaldehyde in indoor environment. The chromatography paper cleaned by $3\%$ hydrogen peroxide solution was experimently determined as a optimum absorbtion filter for the collection of formaldehyde. The passive sampler with a broad cross-sectional area and a short diffusion length was quite good in sensitivity. The passive sampler and the active sampling method with an impinger were strongly correlated with a correlation coefficient of 0.9848. The limits of detection and quantification of the passive sampler for the measurement of formaldehyde in the indoor environment were 7.5 and 10.2 ppb, respectively. Temperature ($19\∼28^{circ}C$) and relative humidity ($30\∼90\%$) had slight influence on the sampling rate of the passive sampler. However, the increase of flow velocity on the surface of sampler resulted in the increase of sampling rate.

• 대한환경공학회지
• /
• 제33권11호
• /
• pp.790-796
• /
• 2011

본 연구에서는 시화지구의 공단과 주거 지역에서의 휘발성 유기화합물 농도를 능동식과 수동식 시료채취기를 이용해 측정하고 그 특성을 비교 분석하였다. TVOC의 평균농도는 패시브샘플러(passive sampler)의 경우 공단지역이 주거지역보다 1.86배 더 높게 나타났다. 능동식 시료채취기의 경우 공단지역이 주거지역보다 1.07배 더 높게 나타났다. Passive sampler를 이용하였을 경우 공단지역이 주거지역보다 대부분의 물질에서 농도가 높게 나타났지만 열탈착 흡착 튜브(thermal desorption tube)를 이용했을 경우는 트리클로로에틸렌, 톨루엔, 에틸벤젠, 자일렌 등 일부 물질의 농도에 있어서 주거지역이 오히려 높게 나타났다. 전체 BTEX 비율 중에서 전반적으로 톨루엔이 차지하는 비율이 가장 컸으며, passive sampler의 경우 공단지역이 주거지역보다 톨루엔, 에틸벤젠, 자일렌의 상대비율이 높게 나타났다. 그러나 열탈착 흡착 튜브의 경우는 오히려 주거지역이 더 높게 나타났다. 본 연구를 통해서 대기오염 목적성분의 시간적, 공간적 농도 특성 파악을 위한 passive sampler를 이용하면 오염관리 혹은 역학적 연구에 도움이 되는 적절한 시료채취 방법이라는 사실을 알 수 있었다.

• Journal of Korean Society for Atmospheric Environment
• /
• 제22권E1호
• /
• pp.1-8
• /
• 2006

The purpose of this study was to evaluate the efficiency of a passive sampler in measuring atmospheric ammonia concentrations using chamber system. The ability of the passive sampler to quantitatively determine atmospheric ammonia gas was almost identical to that of the reference method (indophenol method). There was no significant difference between concentrations measured by the two methods. The detection and quantification limits of the ammonia passive sampler were 16.9 ppb and 25.3 ppb, respectively, for a 24-h sampling period. The average coefficient of variation between replicated samplers was $6.7{\pm}4.2%$. The concentrations measured by the two methods (passive sampler and indophenol method) were no significant difference with good a correlation (correlation coefficient=0.964).

• 환경영향평가
• /
• 제7권2호
• /
• pp.83-88
• /
• 1998

Filter badge type sampler has not been widely used to evaluate air quality over large cities in Korea while it can be successfully used for multi-point sampling and analysis. We evaluated the passive sampler as a new tool to monitor air quality over large cities. We latticed Metropolitan Seoul into $2{\times}2Km$ to give 136 points. $NO_2$ concentrations were measured at all the points in the Spring and Summer of 1997. According to the passive sampler data, natural green zones generally recorded lower $NO_2$ concentrations than major streets and traffic congestion areas. Passive samplers with abundant 136 points gave more detailed picture of $NO_2$ distribution while auto-monitoring network did not clearly provide the characteristics of local land use. Also, passive samplers gave 15% higher values than auto-monitoring network. The correlation between the two values appears very high judging from the regression slope of 0.92 and correlation coefficient of 0.91. This study clearly demonstrates the effectiveness of the passive sampler as a tool to monitor air quality over large cities.

• 한국대기환경학회:학술대회논문집
• /
• 한국대기환경학회 2001년도 추계학술대회 논문집
• /
• pp.319-320
• /
• 2001

Passive sampler는 현장에서 제약 없이 사용할 수 있다는 간편성과 그 측정결과의 정확성, 정밀성에 대하여 입증된 바 있는 측정도구로써 대기질 측정 및 모니터링뿐만 아니라 최근에는 대기확산모델의 검증자료로도 활용되고 있다(김선태, 2001). 이러한 측정방법은 국내의 경우 1992년 이후 한정적으로 사용되었으나, 최근에는 국내뿐 아니라 해외에서도 passive sampler를 사용하는 사례가 증가하고 있으며, UNEP에서도 다양한 목적으로의 활용성을 언급하고 있다(UNEP, 1994). (중략)

• 한국대기환경학회지
• /
• 제20권4호
• /
• pp.483-491
• /
• 2004

The purpose of this study is to develop an ozone passive sampler and to evaluate its performance p-Acetamidophenol using as the reagent for ozone reacts specifically with the ambient ozone to produce a fluorescence material (p-acetamidopheonl dimer). The volume of absorbent solution and the extraction time determined at suitable conditions for measuring ozone were 100$\mu$L and 60 min, respectively. The changes of fluorescence were observed with incresing the storage period of passive samplers in ambient air. but the cool storage in a refrigerator did not remarkably influence the increase of fluorescence. The measurement for the precision oi the passive sampling was carried out with duplicate measurement of passive samplers. The intra-class correlation coefficients of passive samplers using dry and wet filters were 0.992 and 0.962, respectively The results from field validation tests indicated practical agreement (dry filter: r=0.963, wet filter: r=0.995) between the passive sampler and an UV photometric $O_3$ analyzer. The limit of quantification of ozone passive samplers with sampling time of 8 hr (wet filter) and 24 hr (dry filter) were 8.0 ppb and 2.7 ppb, respectively.

• 한국해양학회지:바다
• /
• 제24권2호
• /
• pp.249-265
• /
• 2019

수동형채집기(passive sampler)는 해수나 퇴적물 내 공극수에서의 자유용존상 농도 (freely dissolved and bioavailable concentration, $C_{free}$)를 쉽고 보다 정확히 예측할 수 있는 유망한 방법 중 하나이다. 유럽이나 미국에서는 보다 정확한 위해도 평가를 위해 해양환경 모니터링에 수동형채집기를 적극적으로 사용하는 추세이지만, 현장 적용 시 노출시간이 길어짐에 따라 수동형채집기의 생물부착으로 인한 문제점으로 국내에서의 활용도는 매우 낮다. 따라서 본 연구에서는 난분해성 유기오염물질을 대상으로 하는 수동형채집기의 원리 및 기본적인 특징을 파악하고, 수동형채집기의 현장 적용을 위한 다양한 개선 사례를 조사함으로써 국내에서의 수동형채집기의 활용도를 높이기 위한 방안을 제시하였다.