Droplet-enhanced microspectrometry for trace level hexavalent chromium detection

Xiaoping Li; Chuan Chen; Honglong Chang

doi:10.1109/MEMSYS.2018.8346767

Droplet-enhanced microspectrometry for trace level hexavalent chromium detection

Xiaoping Li, Chuan Chen, Honglong Chang

School of Mechanical Engineering

Northwestern Polytechnical University Xian

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

This paper reports a droplet-enhanced microspectrometry system for quantitative detection of trace level hexavalent chromium (Cr[VI]) in water. A flow-focusing droplet (FFD) chip is proposed as the reaction and colorimetric cell. Two inherent mechanisms within droplet microfluidics are utilized to enhance the absorbance: (1) droplet compartmentalization to reduce the dispersion and (2) reflection at water/oil interface to increase the effective path length. A 15-fold enhancement in absorbance has been experimentally validated as compared to that without droplet. For Cr(VI) detection, a limit of detection (LOD) down to 7 μg L^-1 (0.14 ppb) was achieved.

Original language	English
Title of host publication	2018 IEEE Micro Electro Mechanical Systems, MEMS 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1157-1160
Number of pages	4
ISBN (Electronic)	9781538647820
DOIs	https://doi.org/10.1109/MEMSYS.2018.8346767
State	Published - 24 Apr 2018
Event	31st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2018 - Belfast, United Kingdom Duration: 21 Jan 2018 → 25 Jan 2018

Publication series

Name	Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
Volume	2018-January
ISSN (Print)	1084-6999

Conference

Conference	31st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2018
Country/Territory	United Kingdom
City	Belfast
Period	21/01/18 → 25/01/18

Access to Document

10.1109/MEMSYS.2018.8346767

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Li, X., Chen, C., & Chang, H. (2018). Droplet-enhanced microspectrometry for trace level hexavalent chromium detection. In 2018 IEEE Micro Electro Mechanical Systems, MEMS 2018 (pp. 1157-1160). (Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS); Vol. 2018-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MEMSYS.2018.8346767

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title = "Droplet-enhanced microspectrometry for trace level hexavalent chromium detection",

abstract = "This paper reports a droplet-enhanced microspectrometry system for quantitative detection of trace level hexavalent chromium (Cr[VI]) in water. A flow-focusing droplet (FFD) chip is proposed as the reaction and colorimetric cell. Two inherent mechanisms within droplet microfluidics are utilized to enhance the absorbance: (1) droplet compartmentalization to reduce the dispersion and (2) reflection at water/oil interface to increase the effective path length. A 15-fold enhancement in absorbance has been experimentally validated as compared to that without droplet. For Cr(VI) detection, a limit of detection (LOD) down to 7 μg L-1 (0.14 ppb) was achieved.",

author = "Xiaoping Li and Chuan Chen and Honglong Chang",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 31st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2018 ; Conference date: 21-01-2018 Through 25-01-2018",

year = "2018",

month = apr,

day = "24",

doi = "10.1109/MEMSYS.2018.8346767",

language = "英语",

series = "Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)",

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booktitle = "2018 IEEE Micro Electro Mechanical Systems, MEMS 2018",

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Li, X, Chen, C & Chang, H 2018, Droplet-enhanced microspectrometry for trace level hexavalent chromium detection. in 2018 IEEE Micro Electro Mechanical Systems, MEMS 2018. Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS), vol. 2018-January, Institute of Electrical and Electronics Engineers Inc., pp. 1157-1160, 31st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2018, Belfast, United Kingdom, 21/01/18. https://doi.org/10.1109/MEMSYS.2018.8346767

Droplet-enhanced microspectrometry for trace level hexavalent chromium detection. / Li, Xiaoping; Chen, Chuan; Chang, Honglong.
2018 IEEE Micro Electro Mechanical Systems, MEMS 2018. Institute of Electrical and Electronics Engineers Inc., 2018. p. 1157-1160 (Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS); Vol. 2018-January).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Chen, Chuan

AU - Chang, Honglong

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Y1 - 2018/4/24

N2 - This paper reports a droplet-enhanced microspectrometry system for quantitative detection of trace level hexavalent chromium (Cr[VI]) in water. A flow-focusing droplet (FFD) chip is proposed as the reaction and colorimetric cell. Two inherent mechanisms within droplet microfluidics are utilized to enhance the absorbance: (1) droplet compartmentalization to reduce the dispersion and (2) reflection at water/oil interface to increase the effective path length. A 15-fold enhancement in absorbance has been experimentally validated as compared to that without droplet. For Cr(VI) detection, a limit of detection (LOD) down to 7 μg L-1 (0.14 ppb) was achieved.

AB - This paper reports a droplet-enhanced microspectrometry system for quantitative detection of trace level hexavalent chromium (Cr[VI]) in water. A flow-focusing droplet (FFD) chip is proposed as the reaction and colorimetric cell. Two inherent mechanisms within droplet microfluidics are utilized to enhance the absorbance: (1) droplet compartmentalization to reduce the dispersion and (2) reflection at water/oil interface to increase the effective path length. A 15-fold enhancement in absorbance has been experimentally validated as compared to that without droplet. For Cr(VI) detection, a limit of detection (LOD) down to 7 μg L-1 (0.14 ppb) was achieved.

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PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 31st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2018

Y2 - 21 January 2018 through 25 January 2018

ER -

Droplet-enhanced microspectrometry for trace level hexavalent chromium detection

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