PMID- 17824288
OWN - NLM
STAT- MEDLINE
DCOM- 20071010
LR  - 20190911
IS  - 1096-2247 (Print)
IS  - 1096-2247 (Linking)
VI  - 57
IP  - 8
DP  - 2007 Aug
TI  - Determination of ozone in outdoor and indoor environments using 
      nitrite-impregnated passive samplers followed by ion chromatography.
PG  - 974-80
AB  - An improved ion chromatographic (IC) method has been developed for the separation 
      of nitrate in filter extracts in the presence of high concentrations of nitrite. 
      This analytical method was successfully used for an indirect measurement of ozone 
      (O3) in outdoor and indoor air, following its collection using a 
      nitrite-impregnated passive sampler. The limit of detection and the limit of 
      quantification, using the modified IC method, were 6 microg l(-1) (3sigma) and 20 
      microg l(-1) (10sigma), respectively. Improved detection limits and low baseline 
      noise were obtained with the use of eluent generator and high-capacity ion 
      exchange column. The optimized method was used for assessing O3 concentration in 
      both indoor and outdoor environments of 28 child care centers (CCCs) located in 
      different parts of Singapore. The O3 concentrations ranged from 0.1 to 11.95 
      parts per billion (ppb) in indoor and from 3.2 to 21.7 ppb in outdoor 
      environments during the study period. It was found that, among the CCCs 
      investigated in this study, air-conditioned CCCs and those located in close 
      proximity to traffic emissions had significantly lower O3 concentrations indoors.
FAU - Karthikeyan, Sathrugnan
AU  - Karthikeyan S
AD  - Division of Environmental Science and Engineering, National University of 
      Singapore, Singapore.
FAU - Perumal, Sundararajan Venkatesa
AU  - Perumal SV
FAU - Balasubramanian, Rajasekhar
AU  - Balasubramanian R
FAU - Zuraimi, Mohammed Sultan
AU  - Zuraimi MS
FAU - Tham, Kwok Wai
AU  - Tham KW
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Air Waste Manag Assoc
JT  - Journal of the Air & Waste Management Association (1995)
JID - 9503111
RN  - 0 (Air Pollutants)
RN  - 0 (Nitrites)
RN  - 66H7ZZK23N (Ozone)
SB  - IM
MH  - Air Pollutants/*analysis
MH  - Air Pollution, Indoor/*analysis
MH  - *Chromatography, Ion Exchange
MH  - Environmental Monitoring/*instrumentation/*methods
MH  - *Nitrites
MH  - Ozone/*analysis
MH  - Singapore
EDAT- 2007/09/11 09:00
MHDA- 2007/10/11 09:00
CRDT- 2007/09/11 09:00
PHST- 2007/09/11 09:00 [pubmed]
PHST- 2007/10/11 09:00 [medline]
PHST- 2007/09/11 09:00 [entrez]
AID - 10.3155/1047-3289.57.8.974 [doi]
PST - ppublish
SO  - J Air Waste Manag Assoc. 2007 Aug;57(8):974-80. doi: 10.3155/1047-3289.57.8.974.