US3635564A
Expired / Lapsed
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System for measuring organic content of water
Assignee: Envirotech Corp
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Filing: 1969-07-31
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Granted: 1972-01-18
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Expires: 1989-07-31
Abstract
Abstract A system for measuring the soluble organic content of a water sample by employing a refractometer which compares the refractive index of the water sample to the refractive index of a known or related water sample to obtain a measure of the total soluble content and then corrects this value for the content of the soluble inorganic material by use of an apparatus which compares the electrical conductivity of the water sample to the electrical conductivity of a known or related water sample. The system has the distinct advantage over existing methods of requiring minimal supervision, and short delay time before obtaining analytical results. Thus the system is particularly adapted for performance monitoring of a water treatment facility or for qualitatively monitoring the soluble organic content of a waterstream.
Inventors
- 👤 Mathew M Zuckerman
- 👤 Alan H Molof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:57
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18; G01N33/1826; G05; G05D; G05D21/00; G05D21/02; Y; Y02; Y02A; Y02A20/00; Y02A20/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
30 words
Apparatus in accordance with claim 1 for monitoring the organic content of a waterstream wherein the refractive index and the electrical conductivity of said first water sample are selected constants.
Claim 2
Dependent Claim
149 words
Apparatus for monitoring the performance of a water treatment facility having a reference input stream containing dissolved solids and an output stream containing dissolved solids comprising means for drawing a sample of the water in said reference input stream, means for drawing a sample of the water in said output stream, means for measuring the electrical conductivity of the water in said reference input sample, means for measuring the electrical conductivity of the water in said output sample, means for determining the conductivity difference between said input electrical conductivity and said output electrical conductivity, means for measuring the refractive index difference between thE refractive index of said reference input sample and the refractive index of said output sample, and means for correcting said refractive index difference in accordance with said conductivity difference to produce an indication of the quantity of soluble organic material removed by said water treatment facility.
Claim 3
Dependent Claim
19 words
Apparatus in accordance with claim 3 wherein said means for measuring the refractive index difference comprises a differential refractometer.
Claim 4
Dependent Claim
31 words
Apparatus in accordance with claim 3 wherein said means for correcting said refractive index difference comprises means for subtracting a factor proportional to said conductivity difference from said refractive index difference.
Claim 5
Dependent Claim
70 words
Apparatus in accordance with claim 3 further including means for measuring the turbidity of the water in said input stream, means for measuring the turbidity of the water in said output stream, and means for correcting said indication of the proportion of soluble organic removal by a factor proportional to the comparative turbidity between said input and output streams to provide an indication of the proportion of total organic removal.
Claim 6
Dependent Claim
78 words
A process for measuring the organic content of a wastewater sample comprising the steps of measuring the refractive index of said wastewater sample, measuring the electrical conductivity of said wastewater sample, comparing said refractive index and said electrical conductivity with the refractive index and electrical conductivity of a known reference solution and correcting the comparison between said refractive indices in accordance with the comparison between said electrical conductivities to determine the soluble organic content of said wastewater sample.
Claim 7
Dependent Claim
107 words
A process for measuring the relative organic content of a first water sample containing dissolved solids relative to a second water sample containing dissolved solids comprising the steps of measuring the refractive index of said first water sample used as a reference relative to the refractive index of said second water sample, measuring the electrical conductivity of said first water sample used as a reference relative to the electrical conductivity of said second water sample, correcting said relative refractive index in accordance with said relative electrical conductivity to derive a measure of the relative organic content of said first water sample relative to said second water sample.
Claim 8
Dependent Claim
91 words
A process for measuring the relative organic content of a water sample in accordance with claim 8 further including means for measuring the turbidity of the water in said first water sample used as a reference, means for measuring the turbidity of the water in said second water sample, and means for correcting said indication of the proportion of soluble organic removal by a factor proportional to the comparative turbidity between said first water sample and said second water sample to provide an indication of the proportion of total organic removal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |