Cell and circuit for monitoring photochemical reactions

Details Cell and circuit for monitoring photochemical reactions Cell and circuit for monitoring photochemical reactions

1994-12-14

1997-10-14

Warden, Jill

Chemistry: analytical and immunological testing

Hydrocarbon

Acyclic

422 78, 422 79, 422 80, 422 8202, 422 8212, 436133, 436150, 436159, 436162, 65 38, 65 42, 65 43, 65 591, 65 5921, 65 5922, 65 5923, 65 5924, 65 5925, 65 5926, 65 5927, 65 5928, G01N 2100

Patent

active

056771908

ABSTRACT:
An improved measurement cell and circuit for measuring the electrical characteristics of a liquid sample during exposure to radiation includes a glass cell formed of a main tube extending generally parallel to an elongated lamp emitting the radiation, and a pair of electrodes disposed axially within the sample tube. In the preferred embodiment, the ends of the cell are formed of glass twinbore tubing fused to the glass main tube, the bores retaining ends of the electrodes. Inlet and outlet tubes and a temperature sensing well may also be fused to the main tube. In an implementation for measurement of TOC in water by oxidation to CO.sub.2, the source comprises a low pressure mercury vapor lamp, and the electrodes are formed of solid Ti with catalytic TiO.sub.2 surfaces. The circuit used to monitor variation in electrical characteristics of the liquid during UV exposure controls flow of power to op-amps in order to multiplex a drive signal between the UV exposure cell, a calibration resistor, and a temperature sensor.

REFERENCES:
patent: 2019871 (1935-11-01), Pettingill et al.
patent: 3224837 (1965-12-01), Moyat
patent: 3287088 (1966-11-01), Seevers
patent: 3470465 (1969-09-01), Wuschke
patent: 3535087 (1970-10-01), Hart et al.
patent: 3607071 (1971-09-01), Staffin et al.
patent: 3738812 (1973-06-01), Berry et al.
patent: 3854877 (1974-12-01), Csaky et al.
patent: 3906353 (1975-09-01), Murdock
patent: 3955924 (1976-05-01), Northmore et al.
patent: 3958941 (1976-05-01), Regan
patent: 3964868 (1976-06-01), DiCola et al.
patent: 4140018 (1979-02-01), Maldarelli et al.
patent: 4227151 (1980-10-01), Ellis et al.
patent: 4248598 (1981-02-01), Blunck
patent: 4272679 (1981-06-01), Blades
patent: 4277438 (1981-07-01), Ejzak
patent: 4288229 (1981-09-01), Mar
patent: 4293522 (1981-10-01), Winkler
patent: 4304996 (1981-12-01), Blades
patent: 4357668 (1982-11-01), Schwartz et al.
patent: 4383221 (1983-05-01), Morey et al.
patent: 4418566 (1983-12-01), Beck et al.
patent: 4626413 (1986-12-01), Blades et al.
patent: 4627921 (1986-12-01), Meyers et al.
patent: 4666860 (1987-05-01), Blades et al.
patent: 4683435 (1987-07-01), Blades
patent: 4749657 (1988-06-01), Takahashi et al.
patent: 4825168 (1989-04-01), Ogawa et al.
patent: 4851130 (1989-07-01), May
patent: 4868127 (1989-09-01), Blades et al.
patent: 5047212 (1991-09-01), Blades et al.
patent: 5260663 (1993-11-01), Blades
patent: 5272091 (1993-12-01), Egozy et al.
patent: 5275957 (1994-01-01), Blades et al.
patent: 5334940 (1994-08-01), Blades
patent: 5395522 (1995-03-01), Malanson et al.
patent: 5518608 (1996-05-01), Chubachi
Skalar, "Dissolved/Total . . . ", product description Jun. 1993, cat.311. 5p.
"The Application of On-Line . . . ", Poirier et al, Ultrapure Water, Jul./Aug., 1986, pp. 19-26.
"Conductometric Sensor . . . ", J.J. Symanski, Anal. Chem., 1983, 55, 1152.
"A New Approach . . . ", Poirier et al, American Laboratory, Dec. 1978.

Affiliated with

Also associated with

Rating

Cell and circuit for monitoring photochemical reactions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cell and circuit for monitoring photochemical reactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cell and circuit for monitoring photochemical reactions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1554552