http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Susaya, Janice,Kim, Ki-Hyun,Cho, Jin Woo,Parker, David Elsevier 2011 Journal of chromatography A Vol.1218 No.52
<P><B>Highlights</B></P><P>► In this study, we evaluated the reliability of a permeation tube (PT) device. ► Comparison is made between given and actually measured permeation rate (PR). ► Based on this work, we assess the level of experimental bias in the acquisition of PR.</P> <P><B>Abstract</B></P><P>A series of laboratory experiments were conducted to assess the accuracy of permeation tube (PT) devices using a calibration gas generator system to measure permeation rate (PR) of volatile organic compounds (VOCs). Calibration gas standards of benzene, toluene, and m-xylene (BTX) were produced from PTs at varying flow rates (FR) of 20–1200mLmin<SUP>−1</SUP> and constant temperature (30°C). Results indicate that changes in flow rate greatly affected the permeation rate of each VOC at this temperature. This paper presents experimental approaches to accurately measure actual permeation rate (APR) and the derivation of empirical equations for predicted permeation rate (PPR). If the magnitude of bias is defined as the difference between PPR and the manufacturer's permeation rate (MPR), the bias was typically 19–40% for toluene (T) and 31–54% for m-xylene (X). Benzene (B) exhibited the least bias of 1.4–18.8%, nevertheless our PPR values for benzene were more reliable at lower flow rates (0.75–1.20%). This study highlights the importance of flow rate and associated pressure changes as a key to accurate permeation rate estimation from permeation tube devices.</P>
홍원필,안지원,Ehsanul kabir,Janice susaya,김옥헌,김기현 한국냄새환경학회 2009 실내환경 및 냄새 학회지 Vol.8 No.3
In this study, deodorizing efficiency of three deodorant products (1) A = ClO₂ Gel + charcoal, (2) B=Charcoal Gel, and (3) C = Gel (for Kimchi)) was investigated. For these experiments, a total of 15 odorants (4 reduced sulfur compounds, 2 volatile organic compounds, 7 carbonyl compounds, and 2 nitrogenous compounds) were investigated for a short term period. For the comparative analysis, 2 food types with strong odor properties (Kimchi and Fish) were selected and investigated. The analytical results were compared with respect to the blank sample (without deodorants) after normalization. Hence, if normalized concentration values are lower than unity one can assume that sample has positive deodorizing efficiency. The results of deodorant experiments indicate that the effects of the most common deodorant products are not effective enough to remove offensive odorants. However, the selection of deodorant products appears to be important, as they have very specific deodorizing efficiencies for certain compounds.