Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Reexamination Certificate
2011-03-25
2011-12-06
Hill, Jr., Robert J (Department: 1777)
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
C422S082030, C422S082050, C436S163000, C436S164000
Reexamination Certificate
active
08071031
ABSTRACT:
A device for the precise and accurate potentiometric pH measurements in situ. Embodiments of a potentiometric device according to the invention consist of one or more glass pH-sensitive electrodes connected to a potentiometer. A key feature of the device is that, rather than being calibrated conventionally with buffers, it can be calibrated with an in situ device that measures pH spectrophotometrically. Spectrophotometric pH measurements obtained via sulfonephthalein absorbance measurements are inherently calibrated (do not require buffers). Thus, devices according to the invention allow for continuous potentiometric pH measurements with occasional spectrophotometric calibrations. The spectrophotometric calibration device consists of a spectrophotometer with associated pumps for combining a sulfonephthalein pH indicator with the aqueous medium whose pH is to be measured. The device will record potentiometric pH measurements for an extended period of time until the spectrophotometric device is autonomously activated for another calibration. In this manner precise and accurate pH measurements can be obtained continuously in the environment, and the low energy expenditure of the potentiometric device provides excellent endurance. Also provided is a method and associated devices for spectrophotometrically determining the salinity of an aqueous medium.
REFERENCES:
patent: 5001070 (1991-03-01), Ivaska et al.
patent: 5694206 (1997-12-01), Curtiss
patent: 0285628 (1992-02-01), None
Liu et al., Spectrophotometric Measurements of pH in-Situ: Laboratory and Field Evaluations of Instrumental Performance, Environ. Sci. Technol., 2006, vol. 40, pp. 5036-5044.
Martz et al., A Submersible Autonomous Sensor for Spectrophotometric pH Measurements of Natural Waters, Analytical Chemistry, 2003, vol. 75, No. 8, pp. 1844-1850.
Byrne, Standardization of Standard Buffers by Visible Spectrometry, Analytical Chemistry, 1987, vol. 59, pp. 1479-1481.
Dickson et al., A Comparison of the Equilibrium Constants for the Dissociation of Carbonic Acid in Seawater Media, Deep-Sea Research, 1987, vol. 34, No. 10, pp. 1733-1743.
Byrne, Inorganic Speciation of Dissolved Elements in Seawater: the Influence of pH on Concentration Ratios, Geochemical Transactions, 2002, vol. 3, No. 2, pp. 11-16.
Feely et al., Impact of Anthropogenic CO2 on the CaCO3 System in the Oceans, Science, 2004, vol. 305, pp. 362-366.
Cantrell et al., Rare Earth Element Complexation by Carbonate and Oxalate Ions, Geochimica et Cosmochimica Acta, 1987, vol. 51, pp. 597-605.
Clayton et al., The Role of pH Measurements in Modern Oceanic CO2-System Characterizations: Precision and Thermodynamic Consistency, Deep Sea Research II, 1995, vol. 42, No. 2-3, pp. 411-429.
Acker et al., The Effect of Pressure on Aragonite Dissolution Rates in Seawater, Geochimica et Cosmochimica Acta, 1987, vol. 51, pp. 2171-2175.
Bellerby et al., Shipboard Flow Injection Determination of Sea Water pH with Spectrophotometric Detection, Analytica Chimica Acta, 1995, vol. 309, pp. 259-270.
Broecker et al., Fate of Fossil Fuel Carbon Dioxide and the Global Carbon Budget, Science, 1979, vol. 206, No. 4417, pp. 409-418.
Byrne et al., High Precision Multiwavelength pH Determinations in Seawater Using Cresol Red, Deep-Sea Research, 1989, vol. 36, No. 5, pp. 803-810.
Mehrbach et al., Measurement of the Apparent Dissociation Constants of Carbonic Acid in Seawater at Atmospheric Pressure, Limnology and Oceanography, 1973, vol. 18, No. 6, pp. 897-907.
McGillis et al., Aqueous CO2 Gradients for Air-Sea Flux Estimates, Marine Chemistry, 2006, vol. 98, pp. 100-108.
Lee et al., The Recommended Dissociation Constants for Carbonic Acid in Seawater, Geophysical Research Letters, 2000, vol. 27, No. 2, pp. 229-232.
Soli et al., The Influence of Temperature on PbC003 Formation in Seawater, Marine Chemistry, 2008, vol. 110, pp. 1-6.
Zhang et al., Spectrophotometric pH Measurements of Surface Seawater at In-Situ Conditions: Absorbance and Protonation Behavior of Thymol Blue, Marine Chemistry, 1996, vol. 52, pp. 17-25.
Tapp et al., Apparatus for Continuous-Flow Underway Spectrophotometric Measurement of Surface Water pH, Marine Chemistry, 2000, vol. 72, pp. 193-202.
Millero, The Marine Inorganic Carbon Cycle, Chem. Rev., 2007, vol. 107, pp. 308-341.
Morse, Dissolution Kinetics of Calcium Carbonate in Sea Water: VI. The Near-Equilibrium Dissolution Kinetics of Calcium Carbonate-Rich Deep Sea Sediments, American Journal of Science, 1978, vol. 278, pp. 344-353.
Orr et al., Anthropogenic Ocean Acidification Over the Twenty-First Century and Its Impact on Calcifying Organisms, Nature, 2005, vol. 437, pp. 681-686.
Langdon et al., Effect of Elevated pCO2 on Photosynthesis and Calcification of Corals and Interactions with Seasonal Change in Temperature/Irradiance and Nutrient Enrichment, Journal of Geophysical Research, 2005, vol. 110, pp. 1-16.
Kleypas et al., Impacts of Ocean Acidification on Coral Reefs and Other Marine Calcifiers: A Guide for Future Research, Report of a Workshop held Apr. 18-20, 2005, St. Petersburg, Florida, Sponsored by NSF, NOAA and U.S. Geological Survey, pp. 1-88.
Keir, The Dissolution Kinetics of Biogenic Calcium Carbonates in Seawater, Geochimica et Cosmochimica Acta, 1980, vol. 44, pp. 241-252.
Seiter et al., Redundant Chemical Sensors for Calibration-Impossible Applications, Talanta, 2001, vol. 54, pp. 99-106.
Yao et al., Simplified Seawater Alkalinity Analysis: Use of Linear Array Spectrometers, Deep-Sea Research I, 1998, vol. 45, pp. 1383-1392.
Robert-Baldo et al., Spectrophotometric Determination of Seawater pH Using Phenol Red, Analytical Chemistry, 1985, vol. 57, pp. 2564-2567.
Lewis et al., Program Developed for CO2 System Calculations, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge Tennessee, pp. 1-38.
Ocean Acidification Due to Increasing Atmospheric Carbon Dioxide, The Royal Society, 2005, The Clyvedon Press Ltd., Cardiff, UK, pp. 1-68.
Handbook of Methods for the Analysis of the Various Parameters of the Carbon Dioxide System in Sea Water, Version 2, DOE, 1994, A.G. Dickson & C. Goyet, eds., ORNL/CDIAC-74, Chapter 2.
Byrne et al., Lead Chloride Complexation Using Ultraviolet Molar Absorptivity Characteristics, Journal of Solution Chemistry, 1981, vol. 10, No. 4, pp. 243-251.
Byrne, Inorganic Lead Complexation in Natural Seawater Determined by UV Spectroscopy, Nature, 1981, vol. 290, pp. 487-489.
Clayton et al., Spectrophotometric Seawater pH Measurements: Total Hydrogen Ion Concentration Scale Calibration of m-cresol Purple and At-Sea Results, Deep Sea Research I, 1993, vol. 40, No. 10, pp. 2115-2129.
Fung et al., Determination of Total Organic Carbon in Water by Thermal Combustion-Ion Chromatography, Anal. Chem., 1996, vol. 68, pp. 2186-2190.
Daly et al., Chemical and Biological Sensors for Time-Series Research: Current Status and New Directions, Marine Technology Soc. Journal, 2004, vol. 38, No. 2, pp. 121-143.
Byrne et al., Copper(II) Carbonate Complexation in Seawater, Geochimica Et Cosmochimica Acta, 1985, vol. 49, No. 8, pp. 1837-1844.
Gerido Dwan A
Hill, Jr. Robert J
Lawson Michele L.
Smith & Hopen , P.A.
University of South Florida
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