31 Citations (Scopus)

Abstract

Three methods for the determination of chloramines in water were compared using pH-buffered nanopure water and natural organic matter (NOM) solutions. We investigated whether the N,N-diethyl-p-phenylenediamine (DPD) colorimetric method and/or an adapted indophenol method (Hach MonochlorF) are suitable for determining the concentration of monochloramine in drinking water. Membrane introduction mass spectrometry (MIMS) was used as a reference analysis method to determine the different chloramine species in water. All methods measured monochloramine accurately in Nanopure water, but the DPD colorimetric method measured higher residuals (inorganic and organic chloramines) than MonochlorF or MIMS when in the presence of NOM due to organic chloramines. The indophenol method (MonochlorF) accurately detected only monochloramine and not other chloramine forms. Overall, the monochloramine concentration measured by MonochlorF was comparable with the MIMS results. A combined chlorine residual approach by the DPD colorimetric method does not differentiate between monochloramine and organic chloramines. Therefore, DPD colorimetric methods can overestimate disinfection efficacy in chloraminated water systems because of interference from organic chloramines that have no or poor bactericidal ability. Compared with the DPD colorimetric method, MonochlorF is a better choice for chloraminated water systems.

Original languageEnglish (US)
Pages (from-to)3097-3102
Number of pages6
JournalWater Research
Volume41
Issue number14
DOIs
StatePublished - Jul 2007

Fingerprint

Mass spectrometry
mass spectrometry
membrane
Membranes
Water
Biological materials
Disinfection
water
Potable water
Chlorine
method
comparison
analysis
organic matter
disinfection
chlorine
drinking water

Keywords

  • Analysis
  • Combined residual chlorine
  • DPD colorimetric
  • MIMS
  • Monochloramine
  • MonochlorF

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Comparison of colorimetric and membrane introduction mass spectrometry techniques for chloramine analysis. / Lee, Wontae; Westerhoff, Paul; Yang, Xin; Shang, Chii.

In: Water Research, Vol. 41, No. 14, 07.2007, p. 3097-3102.

Research output: Contribution to journalArticle

@article{622ebfe2697d4bc0818067fedabe5f6f,
title = "Comparison of colorimetric and membrane introduction mass spectrometry techniques for chloramine analysis",
abstract = "Three methods for the determination of chloramines in water were compared using pH-buffered nanopure water and natural organic matter (NOM) solutions. We investigated whether the N,N-diethyl-p-phenylenediamine (DPD) colorimetric method and/or an adapted indophenol method (Hach MonochlorF) are suitable for determining the concentration of monochloramine in drinking water. Membrane introduction mass spectrometry (MIMS) was used as a reference analysis method to determine the different chloramine species in water. All methods measured monochloramine accurately in Nanopure water, but the DPD colorimetric method measured higher residuals (inorganic and organic chloramines) than MonochlorF or MIMS when in the presence of NOM due to organic chloramines. The indophenol method (MonochlorF) accurately detected only monochloramine and not other chloramine forms. Overall, the monochloramine concentration measured by MonochlorF was comparable with the MIMS results. A combined chlorine residual approach by the DPD colorimetric method does not differentiate between monochloramine and organic chloramines. Therefore, DPD colorimetric methods can overestimate disinfection efficacy in chloraminated water systems because of interference from organic chloramines that have no or poor bactericidal ability. Compared with the DPD colorimetric method, MonochlorF is a better choice for chloraminated water systems.",
keywords = "Analysis, Combined residual chlorine, DPD colorimetric, MIMS, Monochloramine, MonochlorF",
author = "Wontae Lee and Paul Westerhoff and Xin Yang and Chii Shang",
year = "2007",
month = "7",
doi = "10.1016/j.watres.2007.04.032",
language = "English (US)",
volume = "41",
pages = "3097--3102",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier Limited",
number = "14",

}

TY - JOUR

T1 - Comparison of colorimetric and membrane introduction mass spectrometry techniques for chloramine analysis

AU - Lee, Wontae

AU - Westerhoff, Paul

AU - Yang, Xin

AU - Shang, Chii

PY - 2007/7

Y1 - 2007/7

N2 - Three methods for the determination of chloramines in water were compared using pH-buffered nanopure water and natural organic matter (NOM) solutions. We investigated whether the N,N-diethyl-p-phenylenediamine (DPD) colorimetric method and/or an adapted indophenol method (Hach MonochlorF) are suitable for determining the concentration of monochloramine in drinking water. Membrane introduction mass spectrometry (MIMS) was used as a reference analysis method to determine the different chloramine species in water. All methods measured monochloramine accurately in Nanopure water, but the DPD colorimetric method measured higher residuals (inorganic and organic chloramines) than MonochlorF or MIMS when in the presence of NOM due to organic chloramines. The indophenol method (MonochlorF) accurately detected only monochloramine and not other chloramine forms. Overall, the monochloramine concentration measured by MonochlorF was comparable with the MIMS results. A combined chlorine residual approach by the DPD colorimetric method does not differentiate between monochloramine and organic chloramines. Therefore, DPD colorimetric methods can overestimate disinfection efficacy in chloraminated water systems because of interference from organic chloramines that have no or poor bactericidal ability. Compared with the DPD colorimetric method, MonochlorF is a better choice for chloraminated water systems.

AB - Three methods for the determination of chloramines in water were compared using pH-buffered nanopure water and natural organic matter (NOM) solutions. We investigated whether the N,N-diethyl-p-phenylenediamine (DPD) colorimetric method and/or an adapted indophenol method (Hach MonochlorF) are suitable for determining the concentration of monochloramine in drinking water. Membrane introduction mass spectrometry (MIMS) was used as a reference analysis method to determine the different chloramine species in water. All methods measured monochloramine accurately in Nanopure water, but the DPD colorimetric method measured higher residuals (inorganic and organic chloramines) than MonochlorF or MIMS when in the presence of NOM due to organic chloramines. The indophenol method (MonochlorF) accurately detected only monochloramine and not other chloramine forms. Overall, the monochloramine concentration measured by MonochlorF was comparable with the MIMS results. A combined chlorine residual approach by the DPD colorimetric method does not differentiate between monochloramine and organic chloramines. Therefore, DPD colorimetric methods can overestimate disinfection efficacy in chloraminated water systems because of interference from organic chloramines that have no or poor bactericidal ability. Compared with the DPD colorimetric method, MonochlorF is a better choice for chloraminated water systems.

KW - Analysis

KW - Combined residual chlorine

KW - DPD colorimetric

KW - MIMS

KW - Monochloramine

KW - MonochlorF

UR - http://www.scopus.com/inward/record.url?scp=34250642353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250642353&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2007.04.032

DO - 10.1016/j.watres.2007.04.032

M3 - Article

VL - 41

SP - 3097

EP - 3102

JO - Water Research

JF - Water Research

SN - 0043-1354

IS - 14

ER -