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Biases in ketone measurements using DNPH-coated solid sorbent cartridges
Ho, SSH (Ho, Steven Sai Hang)[ 1,2,3 ]; Chow, JC (Chow, Judith C.)[ 1,2 ]; Watson, JG (Watson, John G.)[ 1,2 ]; Ip, HSS (Ip, Ho Sai Simon)[ 4 ]; Ho, KF (Ho, Kin Fai)[ 1,3 ]; Dai, WT (Dai, Wen Ting)[ 1 ]; Cao, JJ (Cao, Junji)[ 1 ]
2014-02-21
Source PublicationANALYTICAL METHODS
Volume6Issue:4Pages:967-974
Subtype期刊论文
Abstract

Biases associated with carbonyl measurement using active air sampling through a 2,4-dinitrophenylhydrazine (DNPH)-coated solid sorbent cartridge following the U.S. EPA Method TO-11A are known but have not been fully investigated. Ketones are less reactive than aldehydes in the derivatization with DNPH, resulting in poor collection efficiency. Field studies and laboratory experiments demonstrate the uncertainties associated with two ketones (i.e., acetone and methyl ethyl ketone [MEK]). Ketone collection efficiencies are inversely related to relative humidity (RH), sample flow rate, and sample duration. Since water is a product in the bidirectional derivatization of carbonyls, the reverse reaction competes with the forward reaction as RH increases. Laboratory experiments demonstrate that similar to 35-80% of the ketones can be lost for RH > 50% with a single DNPH cartridge at a temperature of 22 +/- 2 degrees C. Optimal sampling flow rates and sampling durations under high RH need to be determined in various environments to ensure tolerable collection efficiencies.

DOI10.1039/c3ay41636d
Indexed BySCIE ; EI
Language英语
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9723
Collection粉尘与环境研究室
Corresponding AuthorHo, SSH (Ho, Steven Sai Hang)[ 1,2,3 ]
Affiliation1.The State Key Laboratory of Loess and Quaternary Geology, Institute of EarthEnvironment Chinese Academy of Sciences, Xi'an, Shaanxi, 710075, China;
2.Division of Atmospheric Sciences, Desert Research Institute, Reno, NV 89512, USA;
3.Jockey Club School of Public Health and Primary Care, The Chinese University of HongKong, Hong Kong, P.R. China;
4.Hong Kong Premium Services and Research Laboratory, Lai Chi Kok, Kowloon, HongKong, P.R. China
Recommended Citation
GB/T 7714
Ho, SSH ,Chow, JC ,Watson, JG ,et al. Biases in ketone measurements using DNPH-coated solid sorbent cartridges[J]. ANALYTICAL METHODS,2014,6(4):967-974.
APA Ho, SSH .,Chow, JC .,Watson, JG .,Ip, HSS .,Ho, KF .,...&Cao, JJ .(2014).Biases in ketone measurements using DNPH-coated solid sorbent cartridges.ANALYTICAL METHODS,6(4),967-974.
MLA Ho, SSH ,et al."Biases in ketone measurements using DNPH-coated solid sorbent cartridges".ANALYTICAL METHODS 6.4(2014):967-974.
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