Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
2007-07-17
2007-07-17
Olsen, Kaj K. (Department: 1753)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C204S409000, C205S780500
Reexamination Certificate
active
10715489
ABSTRACT:
A system for highly sensitive electrochemical detection of trace nitro-aromatic compounds in air, uses a carbon or carbon/gold working electrode with a surface that is modified to increase the electron transfer kinetics of nitro-aromatic compounds. Chemical modifiers of the working electrode surface include amino-aromatic compounds such as aniline and its derivatives. The detection method involves dissolving trace nitro-aromatic compounds in an electrolyte including aprotonic solvents, or dipolar solvents, in the electrochemical cell including a working electrode, a reference electrode and an auxiliary electrode. Voltage is varied across the working electrode and the reference electrode, and an electrical current is measured between the working electrode and the auxiliary electrode. The measured electrical peak current is a sensitive indication of the concentration of the trace compounds. This invention is appropriate for portable, field-testing of trace explosive compounds in air.
REFERENCES:
patent: 4696184 (1987-09-01), Fukumoto et al.
patent: 4895620 (1990-01-01), Ko et al.
patent: 4970145 (1990-11-01), Bennetto et al.
patent: 4987767 (1991-01-01), Corrigan et al.
patent: 5120421 (1992-06-01), Glass et al.
patent: 5296125 (1994-03-01), Glass et al.
patent: 5521101 (1996-05-01), Saini et al.
patent: 5762808 (1998-06-01), Peyton
patent: 6356433 (2002-03-01), Shi et al.
patent: 6477907 (2002-11-01), Chambers et al.
patent: 6562497 (2003-05-01), Finkelshtain et al.
patent: 6571649 (2003-06-01), Sakairi et al.
patent: 6573107 (2003-06-01), Bowen et al.
Naal et al, Analytical Chemistry, 2002, 74, pp. 140-148.
Xu et al, Analyst, 2000, 125, pp. 1453-1457.
Ye et al, Analytical Chemistry, 1988, 60, pp. 1979-1982.
CAPLUS abstract for US Patent 4,696,184.
Niu et al, Journal of Electroanalytical Chemistry 546, 2003, pp. 59-72.
Malinauskas et al, Journal of Electroanalytical Chemistry 484, 2000, pp. 55-63. □□
STN Registry for Toluidine Blue, Nov. 1984.
Levi et al, Electrochimica Acta, 38, 1993, pp. 271-279.
CAPLUS record for Kitani et al, Molecular Crystals and Liquid Crystals, 296, 1997, pp. 349-356.
“Comparison of Cabron Electrode Bulk modified with HgJ2 and GC Electrode Surface modified with HgJ2 as C/Hg electrode” Filansky; Reviews in Anal. Chem. V18, No. 5 (1999) pp. 293-299, month unknown.
“Explosives Detection Systems (EDS) for Aviation Security” Singh et al;Signal Processing 83 (2003) pp. 31-55, month unknown.
“Single-Channel Microship For Fast Screening And Detailed Identification Of Nitroaromatic Explosives Or Organophosphate Nerve Agents” Wang et al; Anal Chem 2002, 74 pp. 1187-1191, month unknown.
“Remote electrochemical sensor for monitoring TNT in natural waters” Wang et al; Analytica Chimica Acta 361 (1998) 85-91, month unknown.
“On-Line Electrochemical Monitoring Of (TNT) 24,6-Trinitrotoluene In Natural Waters” Wang et al; Analytica Chimica Acta pp. 139-144, month unknown.
“Screen-printed voltammetric sensor for TNT” Wang et al; Talanta 46 (1998) pp. 1405-1407, month unknown.
“Electrochemical Response Of New Carbon Electrodes Bulk Modified With Cobalt Phthalocyanine To Some Thiols In The Presence Of Heptane Or Human Urine” Filanovsky; Alanlytic Chimica Acta 394 (1999) 91-100, month unknown.
Friedman Mark M.
Medis Technologies Ltd.
Olsen Kaj K.
LandOfFree
Electrochemical method and sensor for the detection of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrochemical method and sensor for the detection of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrochemical method and sensor for the detection of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3787998