Removing Water Vapor Interference in Peroxy Radical Chemical Amplification with a Large Diameter Nafion Dryer

Chengqiang Yang; Weixiong Zhao; Bo Fang; Xuezhe Xu; Yang Zhang; Yanbo Gai; Weijun Zhang; Dean S. Venables; Weidong Chen

doi:10.1021/acs.analchem.7b04830

Removing Water Vapor Interference in Peroxy Radical Chemical Amplification with a Large Diameter Nafion Dryer

Chengqiang Yang
, Weixiong Zhao
, Bo Fang
, Xuezhe Xu
, Yang Zhang
, Yanbo Gai
, Weijun Zhang
, Dean S. Venables
, Weidong Chen

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The chemical amplification (PERCA) method has been widely used for measuring peroxy radical concentrations in the troposphere. The accuracy and sensitivity of the method is critically dependent on the chain length (CL) - that is, the number of radical amplification cycles. However, CL decreases strongly with higher relative humidity (RH). So far, there does not appear to be a method to overcome this impact. Here we report the development of a Nafion dryer based dual-channel PERCA instrument. The large diameter Nafion dryer efficiently removes water vapor in milliseconds and minimally affects the sample. The low losses of peroxy radicals on the Nafion membrane make it an attractive tool for raising the CL, and thereby the measurement accuracy and sensitivity of PERCA systems. The reported instrument demonstrates this promising and simple method to minimize water vapor interference.

Original language	English
Pages (from-to)	3307-3312
Number of pages	6
Journal	Analytical Chemistry
Volume	90
Issue number	5
DOIs	https://doi.org/10.1021/acs.analchem.7b04830
Publication status	Published - 6 Mar 2018

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10.1021/acs.analchem.7b04830

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title = "Removing Water Vapor Interference in Peroxy Radical Chemical Amplification with a Large Diameter Nafion Dryer",

abstract = "The chemical amplification (PERCA) method has been widely used for measuring peroxy radical concentrations in the troposphere. The accuracy and sensitivity of the method is critically dependent on the chain length (CL) - that is, the number of radical amplification cycles. However, CL decreases strongly with higher relative humidity (RH). So far, there does not appear to be a method to overcome this impact. Here we report the development of a Nafion dryer based dual-channel PERCA instrument. The large diameter Nafion dryer efficiently removes water vapor in milliseconds and minimally affects the sample. The low losses of peroxy radicals on the Nafion membrane make it an attractive tool for raising the CL, and thereby the measurement accuracy and sensitivity of PERCA systems. The reported instrument demonstrates this promising and simple method to minimize water vapor interference.",

author = "Chengqiang Yang and Weixiong Zhao and Bo Fang and Xuezhe Xu and Yang Zhang and Yanbo Gai and Weijun Zhang and Venables, \{Dean S.\} and Weidong Chen",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

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day = "6",

doi = "10.1021/acs.analchem.7b04830",

language = "English",

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T1 - Removing Water Vapor Interference in Peroxy Radical Chemical Amplification with a Large Diameter Nafion Dryer

AU - Yang, Chengqiang

AU - Zhao, Weixiong

AU - Fang, Bo

AU - Xu, Xuezhe

AU - Zhang, Yang

AU - Gai, Yanbo

AU - Zhang, Weijun

AU - Venables, Dean S.

AU - Chen, Weidong

PY - 2018/3/6

Y1 - 2018/3/6

N2 - The chemical amplification (PERCA) method has been widely used for measuring peroxy radical concentrations in the troposphere. The accuracy and sensitivity of the method is critically dependent on the chain length (CL) - that is, the number of radical amplification cycles. However, CL decreases strongly with higher relative humidity (RH). So far, there does not appear to be a method to overcome this impact. Here we report the development of a Nafion dryer based dual-channel PERCA instrument. The large diameter Nafion dryer efficiently removes water vapor in milliseconds and minimally affects the sample. The low losses of peroxy radicals on the Nafion membrane make it an attractive tool for raising the CL, and thereby the measurement accuracy and sensitivity of PERCA systems. The reported instrument demonstrates this promising and simple method to minimize water vapor interference.

AB - The chemical amplification (PERCA) method has been widely used for measuring peroxy radical concentrations in the troposphere. The accuracy and sensitivity of the method is critically dependent on the chain length (CL) - that is, the number of radical amplification cycles. However, CL decreases strongly with higher relative humidity (RH). So far, there does not appear to be a method to overcome this impact. Here we report the development of a Nafion dryer based dual-channel PERCA instrument. The large diameter Nafion dryer efficiently removes water vapor in milliseconds and minimally affects the sample. The low losses of peroxy radicals on the Nafion membrane make it an attractive tool for raising the CL, and thereby the measurement accuracy and sensitivity of PERCA systems. The reported instrument demonstrates this promising and simple method to minimize water vapor interference.

UR - https://www.scopus.com/pages/publications/85043451484

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SP - 3307

EP - 3312

JO - Analytical Chemistry

JF - Analytical Chemistry

IS - 5

ER -

Removing Water Vapor Interference in Peroxy Radical Chemical Amplification with a Large Diameter Nafion Dryer

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