Toward In Situ Monitoring of Water Contamination by Nitroenergetic Compounds

Sensors

Brandy J. Johnson¹  Iwona A. Leska³  Alejandro Medina⁵  Norris F. Dyson²  Mansoor Nasir⁴  Brian J. Melde¹  Jenna R. Taft³ 

[1] Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA; E-Mails:;College of Engineering, North Carolina A&T State University, Greensboro, NC 27411, USA; E-Mail:;NOVA Research Incorporated, Alexandria, VA 22308, USA; E-Mails:;Biomedical Engineering, Lawrence Technological University, Southfield, MI 48075, USA; E-Mail:;Department of Chemistry, University of Puerto Rico at Arecibo, Arecibo 00613, Puerto Rico; E-Mail:

关键词: perchlorate;    RDX;    2;    4;    6-trinitrotoluene;    periodic mesoporous organosilica;    electrochemical;    solid phase extraction;   

DOI  :  10.3390/s121114953

来源: mdpi

【 摘 要 】

We have previously described the application of novel porous organosilicate materials to the preconcentration of nitroenergetic targets from aqueous solution prior to HPLC analysis. The performance of the sorbents and the advantages of these types of materials over commercially available solid phase extraction sorbents have been demonstrated. Here, the development of systems for application of those sorbents to in situ monitoring is described. Considerations such as column pressure, particulate filtration, and component durability are discussed. The diameter of selected column housings, the sorbent bed depth, and the frits utilized significantly impact the utility of the sorbent columns in the prototype system. The impact of and necessity for improvements in the morphological characteristics of the sorbents as they relate to reduction in column pressure are detailed. The results of experiments utilizing a prototype system are presented. Data demonstrating feasibility for use of the sorbents in preconcentration prior to ion mobility spectrometry is also presented.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.