Detection And Analysis Of Volatile Organic
Chemicals In Waste Water Using
An Electronic Nose
Author(s)
E. J. Staples & S. Viswanathan
Abstract
This paper describes use of a new type of electronic nose, called the zNose for
measurement of volatile organic compounds in water. Based upon ultra-fast gas
chromatography, the zNose is able to perform analytical measurements of
volatile organic vapors in near real time with part-per-billion sensitivity.
Separation and quantification of the individual chemicals within water samples is
performed in seconds. Using a patented solid-state mass-sensitive detector,
picogram sensitivity, universal non-polar selectivity, and electronically variable
sensitivity is achieved. An integrated vapor pre-concentrator coupled with the
electronically variable detector allow the instrument to measure VOC
concentrations spanning 6+ orders of magnitude.
Using the electronic nose an on-site procedure for measuring the
concentration of VOCs in water based on headspace analysis is described.
Measurement of volatile chemicals in water headspace vapors is correlated with
water standards using Henry’s Law. Use of this instrument and procedure for
aniline and nitrobenzene contaminated water is described. The real time
measurement technique has recently been used to measure the concentrations of
aniline and nitrobenzene in the Songhua River caused as a result of an explosion
at a petrochemical plant in northeastern China. The ease and economics of real
time on-site measurements has direct financial benefits.
Keywords: VOCs in water, electronic nose, aniline, nitrobenzene.
Keywords
VOCs in water, electronic nose, aniline, nitrobenzene.
Related Book
Other papers in this volume
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