In-situ soil nitrate ion concentration sensor

Details In-situ soil nitrate ion concentration sensor In-situ soil nitrate ion concentration sensor

2011-04-19

2011-04-19

Soderquist, Arlen (Department: 1777)

Chemistry: analytical and immunological testing

Nitrogen containing

Nitrite or nitrate

C422S082010, C422S082030, C422S082050, C422S082090, C436S028000, C436S149000, C436S150000, C436S151000, C436S164000, C436S172000, C436S171000

Reexamination Certificate

active

07927883

ABSTRACT:
A method and apparatus for near real-time in-situ soil solution measurements is presented. An outer sleeve is placed in soil where ionic concentrations of organic or inorganic species are to be measured. A porous section connects with the outer sleeve (the porous section initially loaded with distilled water) equilibrates with the solution present in soil pores to form a solution to be measured. The initial distilled water is displaced within the porous section by a removable plunger. After substantial equilibration of the solution to be measured within the apparatus, the plunger is removed and a removable probe replaced. The probe may be an Ion Selective Electrode, or a transflection dip probe. The probe then may be used under computer control for measurement of solution properties. The Ion Selective Electrode may measure nitrate (NO3−) concentrations. The transflection dip probe may be read with spectrometer with an input deuterium light source.

REFERENCES:
patent: 1843878 (1932-02-01), Laubmeyer
patent: 3028313 (1962-04-01), Oberdorfer, Jr. et al.
patent: 3427862 (1969-02-01), Hubner
patent: 3690166 (1972-09-01), Grice et al.
patent: 3786675 (1974-01-01), Delatorre et al.
patent: 3862576 (1975-01-01), Pogorski
patent: 3864232 (1975-02-01), Handman et al.
patent: 3877291 (1975-04-01), Hoppesch et al.
patent: 4056969 (1977-11-01), Barringer
patent: 4350051 (1982-09-01), Thompson
patent: 4408481 (1983-10-01), Sidey
patent: 4578586 (1986-03-01), Preston
patent: 4580440 (1986-04-01), Reid et al.
patent: 4696903 (1987-09-01), Owen
patent: 4782234 (1988-11-01), Chudyk et al.
patent: 4804050 (1989-02-01), Kerfoot
patent: 4857473 (1989-08-01), Margaritz et al.
patent: 5010776 (1991-04-01), Lucero et al.
patent: 5083019 (1992-01-01), Spangler
patent: 5128882 (1992-07-01), Cooper et al.
patent: 5150622 (1992-09-01), Vollweiler
patent: 5246862 (1993-09-01), Grey et al.
patent: 5316950 (1994-05-01), Apitz et al.
patent: 5337838 (1994-08-01), Sorensen
patent: 5351532 (1994-10-01), Hager
patent: 5355739 (1994-10-01), Cooper et al.
patent: 5358057 (1994-10-01), Peters et al.
patent: H1470 (1995-08-01), Ewing et al.
patent: 5439800 (1995-08-01), Thompson
patent: 5445795 (1995-08-01), Lancaster et al.
patent: 5497091 (1996-03-01), Bratton et al.
patent: 5635710 (1997-06-01), Reed et al.
patent: 5644395 (1997-07-01), Folta
patent: 5676820 (1997-10-01), Wang et al.
patent: 5739536 (1998-04-01), Bucholtz et al.
patent: 5759859 (1998-06-01), Sausa
patent: 5798940 (1998-08-01), Bratton et al.
patent: 5826214 (1998-10-01), Lieb et al.
patent: 5889217 (1999-03-01), Rossabi et al.
patent: 5902939 (1999-05-01), Ballard et al.
patent: 5993743 (1999-11-01), Nordman et al.
patent: 6085576 (2000-07-01), Sunshine et al.
patent: 6208940 (2001-03-01), Kram et al.
patent: 6242261 (2001-06-01), Schoenau et al.
patent: 6275645 (2001-08-01), Vereecken et al.
patent: 6362741 (2002-03-01), Hickox et al.
patent: 6378362 (2002-04-01), Dickinson
patent: 6487920 (2002-12-01), Robbat, Jr.
patent: 6666068 (2003-12-01), Boyd et al.
patent: 6740216 (2004-05-01), Diakonov et al.
patent: 6826972 (2004-12-01), Clark et al.
patent: 6920780 (2005-07-01), Hubbell et al.
patent: 7003405 (2006-02-01), Ho
patent: 7131341 (2006-11-01), Wareham et al.
patent: 7234362 (2007-06-01), Shinn et al.
patent: 7427504 (2008-09-01), Torgersen et al.
patent: 2004/0005715 (2004-01-01), Schabron et al.
Aldstadt, J. H. et al, Mikrochimica Acta 1997, 127, 1-18.
Beltran, A. et al, Electroanalysis 2002, 14, 213-220.
Artigas, J. et al, Sensors and Actuators B 2003, 88, 337-344.
Capitain-Vallvey, L. F. et al, Analytical Chemistry 2005, 77, 4459-4466.
Dorn, J. G. et al, Environmental Science Technology 2005, 39, 8898-8905.
P. Riga et al. Ionic-Equilibrium Time Inside Ceramic Cups in Unsaturated Porous Media. Soil Sci. Am. J., vol. 62, pp. 574-579 (1998).
P. Moutonnet et al. Simultaneous Field Measurement of Nitrate-Nitrogen and Matric Pressure Head. Soil Sci. Am. J., vol. 57, pp. 1458-1462 (1993).
S. Rafi Ahmad et al. Non-Invasive Monitoring of Inorganic Species in Water. SPIE vol. 2504, pp. 436-447 (1995).

Affiliated with

Also associated with

Rating

In-situ soil nitrate ion concentration sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with In-situ soil nitrate ion concentration sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In-situ soil nitrate ion concentration sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2630549