Examination of The Temporal Effect on Flowing Signals in Microbore Tubing

碩士 === 國立交通大學 === 應用化學系所 === 96 === Flow injection analysis (FIA) is an automatic analysis technology. The recorded signals of FIA often appear in asymmetric tailing peaks. A hypothesis of temporal effect is proposed to explain the tailing phenomenon recently. Because the spatial distribution of the...

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Main Authors: Yu-Chun Chen, 陳鈺君
Other Authors: Tiing Yu
Format: Others
Language:zh-TW
Published: 2008
Online Access:http://ndltd.ncl.edu.tw/handle/48854726652579456750
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spelling ndltd-TW-096NCTU55000222015-10-13T13:51:49Z http://ndltd.ncl.edu.tw/handle/48854726652579456750 Examination of The Temporal Effect on Flowing Signals in Microbore Tubing 流動訊號在微管路中時間效應之探討 Yu-Chun Chen 陳鈺君 碩士 國立交通大學 應用化學系所 96 Flow injection analysis (FIA) is an automatic analysis technology. The recorded signals of FIA often appear in asymmetric tailing peaks. A hypothesis of temporal effect is proposed to explain the tailing phenomenon recently. Because the spatial distribution of the sample in the flow channel changes with time, the recorded signal from a traditional single-channel detector is actually taking the accumulation result of the spatial profile variation of the sample in the channel. Accordingly, the recorded signal as a function of time is different from the true spatial distribution of the sample in the flow channel . The spatial profiles of the sample in the flow channel are recorded as a function of time using a multi-channel detection system. Under two tube diameters (500μm and 750μm) and various linear flow rates (1.83~18.3 cm/s), apparent differences are observed by comparing peak shapes between the spatial and temporal profiles. Thus the temporal effect is confirmed. This effect is found to increase as the inner diameters of the tube and flow speed become larger. The sample zone expands more pronounced in the earlier stage after sample injection. Thus, tailing peaks are obtained due to the greater temporal effect. When the sample flows in the channel for a longer time; however, the expansion of the sample zone becomes steady. Gaussian peak profiles are thus recorded due to the negligible temporal effect. Tiing Yu 余艇 2008 學位論文 ; thesis 98 zh-TW
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 碩士 === 國立交通大學 === 應用化學系所 === 96 === Flow injection analysis (FIA) is an automatic analysis technology. The recorded signals of FIA often appear in asymmetric tailing peaks. A hypothesis of temporal effect is proposed to explain the tailing phenomenon recently. Because the spatial distribution of the sample in the flow channel changes with time, the recorded signal from a traditional single-channel detector is actually taking the accumulation result of the spatial profile variation of the sample in the channel. Accordingly, the recorded signal as a function of time is different from the true spatial distribution of the sample in the flow channel . The spatial profiles of the sample in the flow channel are recorded as a function of time using a multi-channel detection system. Under two tube diameters (500μm and 750μm) and various linear flow rates (1.83~18.3 cm/s), apparent differences are observed by comparing peak shapes between the spatial and temporal profiles. Thus the temporal effect is confirmed. This effect is found to increase as the inner diameters of the tube and flow speed become larger. The sample zone expands more pronounced in the earlier stage after sample injection. Thus, tailing peaks are obtained due to the greater temporal effect. When the sample flows in the channel for a longer time; however, the expansion of the sample zone becomes steady. Gaussian peak profiles are thus recorded due to the negligible temporal effect.
author2 Tiing Yu
author_facet Tiing Yu
Yu-Chun Chen
陳鈺君
author Yu-Chun Chen
陳鈺君
spellingShingle Yu-Chun Chen
陳鈺君
Examination of The Temporal Effect on Flowing Signals in Microbore Tubing
author_sort Yu-Chun Chen
title Examination of The Temporal Effect on Flowing Signals in Microbore Tubing
title_short Examination of The Temporal Effect on Flowing Signals in Microbore Tubing
title_full Examination of The Temporal Effect on Flowing Signals in Microbore Tubing
title_fullStr Examination of The Temporal Effect on Flowing Signals in Microbore Tubing
title_full_unstemmed Examination of The Temporal Effect on Flowing Signals in Microbore Tubing
title_sort examination of the temporal effect on flowing signals in microbore tubing
publishDate 2008
url http://ndltd.ncl.edu.tw/handle/48854726652579456750
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