New paper published in Analytical Chemistry
Wednesday, 26 September 2012 at 10:13:AM
Ultimate detectability of volatile organic compounds: How much further can we reduce their ambient air sample volumes for analysis?
Y.-H. Kim and K.-H. Kim, Analytical Chemistry, 2012, 84 (19), pp 8284–8293
In this paper, published in the high-profile ACS journal Analytical Chemistry, Yong-Hyun Kim and Ki-Hyun Kim from Sejong University in Seoul, Korea, examined the limits of detection of VOCs using TD–GC/MS.
Using a Markes UNITY TD system, an Agilent GC and ALMSCO International’s BenchTOF-dx TOF mass spectrometer, they investigated 19 VOCs representative of those found in air-monitoring studies, and calculated just how little sample was needed in order to obtain a detectable response.
Remarkably, they found that the average limit of detection for major aromatic VOCs such as benzene, toluene and xylene was just 0.122 pg, corresponding to sampling volumes as low as 1 mL for an air concentration of about 1 ppb.
The authors conclude that the TD–GC/MS system described “should offer higher sensitivity than other available analytical systems for VOC air monitoring”. In addition to allowing monitoring of chemicals at ever-lower levels, they say that such systems can “enhance routine air monitoring applications by enabling the collection of much smaller air volumes”.
To read the full paper, click here.