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Class 205/788.5 - Including titration


Subclass of Class 205 - Electrolysis: processes, compositions used therein, and methods of preparing the compositions
Definition: Subject matter which involves the volumetric determination
No. of patents: 41
Last issue date: 07/25/2006


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NumberTitleIssue Date
7080975Integrated pump and ceramic valve
A pump apparatus is provided which comprises a displacement pump and a ceramic valve construction formed of a ceramic rotor and a ceramic stator having flat surfaces which are positioned in sealing relationship. The displacement pump comprises a reciprocating piston...
07/25/2006
7022215System and methods for analyzing copper chemistry
The present invention relates to methods for removing the matrix effects caused by variance in copper concentration and acidity during measurement of the organic additive concentration in a sample copper plating solution. ...
04/04/2006
6954560Attenuated total reflection spectroscopic analysis of organic additives in metal plating solutions
The present invention relates to method and apparatus for determining concentrations of organic additives in metal plating solutions, based on infrared spectroscopy, and more specifically attenuated total reflection infrared spectroscopy (ATR-IR). ...
10/11/2005
6913686Methods for analyzing solder plating solutions
The present invention relates to methods and apparatus for determining concentrations of various inorganic or organic components in solder plating solutions, which include titration or parallel titration methods, direct potentiometry methods, calibration methods, an...
07/05/2005
6749739Detection of suppressor breakdown contaminants in a plating bath
Relative concentrations of active suppressor additive species and suppressor breakdown contaminants in an acid copper electroplating bath are determined by cyclic voltammetric stripping (CVS) dilution titration analysis using two negative electrode potential limits....
06/15/2004
6361670Device for coulometric determination of water by the Karl Fischer method
A device for the coulometric determination of water by a Karl Fischer reaction comprising a membrane-free measuring cell that contains a liquid reagent, an iodine indicating means, an anode, a cathode and a casing around the cathode to define a cathode sp...
03/26/2002
6315888Method of constant-current polarization voltage and apparatus for Karl-Fischer technique
A constant-current polarization voltage detecting method includes step of feeding to a detecting electrode a predetermined minute current in a pulse form, and detecting sequentially a polarization voltage at each time of feeding the pulsating current, in ...
11/13/2001
6254760Electro-chemical deposition system and method
The present invention generally provides an electro-chemical deposition system that is designed with a flexible architecture that is expandable to accommodate future designs rules and gap fill requirements and provides satisfactory throughput to meet the ...
07/03/2001
5891322Electroanalysis process using potentiometry with coulometric stripping (elution)
Electroanalysis of an electroactive, and especially ionized, species, in trace form, in a liquid sample, is by potentiometry with coulometric stripping (elution), and is by employing a working electrode in electrical contact with the sample. A practically...
04/06/1999
5518933Method of analyzing washings for free acids and ions
A method of determining the concentrations of at least two of plural kinds of known free acids and ions contained in a solution, wherein these known free acids and ions are known beforehand to be different from each other in temperature changes and conduc...
05/21/1996
5466606Use of N-methylformamide as solvent for the Karl Fischer titration
The invention relates to the use of N-methylformamide as solvent in the determination of water by the Karl Fischer method....
11/14/1995
5288374Method and apparatus for electrochemical analysis and an aqueous solution for use therein
A method of electrochemical analysis involves contacting fluid samples of first and second different types in a mixed sequence with an electrochemical sensor, and also contacting the sensor with a standard fluid, in order to measure the values of an analy...
02/22/1994
5186895Method and apparatus for automatic analysis of fluid composition involving a time-dependent variation thereof
An automatic analytical apparatus in which a series of operations ranging from the sampling into a treating receptacle, pretreatment, analysis and discharge of a fluid sample to the preparation for the next analysis are repeated automatically in order, wh...
02/16/1993
4948473Surfactant sensing electrode for potentiometric titrations
A coated-wire electrode for potentiometrically titrating surfactant molecules having more than ten carbon atoms includes an electrically-conductive core coated with a semipermeable membrane. The membrane matrix included a polymer, a plasticizer and an ion...
08/14/1990
4929314Coulometric titrator apparatus and method
A high pressure coulometric titration apparatus features a pressure vessel for containing a titration vessel, which is capable of being subjected to a pressure above the vaporization pressure of the sample to be analyzed. A back pressure regulator is empl...
05/29/1990
4897128Process of determining the zinc content of phosphating baths
Described is a process for determining the zinc content of an acid aqueous phosphating bath. A bath sample is titrated at a pH value between 1.2 and 1.7 in the presence of ethylenediaminetetraacetic acid, hexamethylenetetramine and alkalihexacyanoferrate ...
01/30/1990
4839000Buffer compensation in enzyme-modified ion sensitive devices
A system suitable for determining the concentration of an enzyme's substrate in a solution 21 containing a buffer comprises two ion-sensitive devices 22, 23, such as ISFETS, in contact with the solution, one of the devices 23, e.g. an ENFET, having a laye...
06/13/1989
4810331Surfactant sensing electrode for potentiometric titrations
A coated-wire electrode for potentiometrically titrating surfactant molecules having more than ten carbon atoms includes an electrically-conductive core coated with a semipermeable membrane. The membrane matrix includes a polymer a plasticizer and an ion-...
03/07/1989
4802957Method for measuring the water content of a solid sample using Karl Fischer's coulometric titration
An electrolytic solution for Karl Fischer's coulometric titation and a method for measuring the water content of a sample using the same are disclosed. The electrolytic solution contains iodine or an iodide, sulfur dioxide, an amine and a solvent, wherein...
02/07/1989
4720464Electrolytes for Karl Fischer coulometric titration
An electrolyte for Karl Fischer coulometric titration, which contains (a) iodine or an iodine compound, (b) sulfur dioxide, (c) a halogenated hydrocarbon or an aromatic hydrocarbon, and (d) (i) an amine of the following general formula (I), an amine of the followin...
01/19/1988
4703014Karl-Fischer reagent and process for the determination of water
A Karl-Fischer reagent useful in a process for the determination of water contains a pyridine substitute, sulfur dioxide and iodine. As the pyridine substitute, the reagent contains at least one compound from the group comprising the guanidines, amidines,...
10/27/1987
4664756Method of detecting electrode potential in Karl Fischer moisture meter
A method of detecting an electrode potential in a Karl Fischer moisture meter comprises the step of subtracting an electrode potential which is caused by a liquid resistance of a liquid sample from an electrode potential which is generated in an end point...
05/12/1987
4582572Method for detecting end point of titration
An end point of polarization titration is detected by the steps of passing constant DC pulse having a magnitude of 0.1-100 μA between a pair of detection electrodes immersed in a solution to be titrated, detecting a polarization state generated between t...
04/15/1986
4541902Analytical method for determining formaldehyde in electroless copper plating bath
An analytical method for determining by potentiometric titration formaldehyde in an electroless copper plating bath, which comprises using a hydroxylamine salt such as hydroxylamine hydrochloride as the titrant and using a silver electrode as the indicato...
09/17/1985
4468289Coulometric titration method
In a coulometric titration method, during a preparation step before a titration step a composition to be titrated is accumulated in an electrolyte....
08/28/1984
4368105Electrolytic solution for Karl Fischer coulometric titration
There is disclosed an electrolytic solution for Karl Fischer method comprising chloroform and an alkylene carbonate as solvent and iodine or an iodide, sulfur dioxide, pyridine and a small amount of an alcohol. The solution is suitable for use in determin...
01/11/1983
4367197Method for the control of excessive corrosion in phosphoric acid circuits
Methods for control of excessive corrosion in wet process phosphoric circuits are effected by oxidation of reduced ion species in the acid with maintenance of EMF value of the acid above about 190 millivolts (S.C.E. reference) through the digestion circui...
01/04/1983
4312715Method and an apparatus for electrochemical analysis
An autotitration method for electrochemically determining the concentration of a substance (S) contained in a fluid, which is arranged to flow past a generator electrode (2) and downstream thereof a detector electrode (3), said substance being capable of ...
01/26/1982
4302299Titration control method
In a titration controlling method and apparatus wherein variations of a titration system caused by intermittent titrations are successively detected electrically, and the quantity of each intermittent titration is controlled by an electric signal obtained...
11/24/1981
4282072Method for automatic industrial electrochemical analysis
A method for automatic electrochemical titration, by argentimetric coulometry, comprising automatic injection into an electrochemical cell of a sample containing a substance A to be titrated, and an electrolyte, the ratio of sample to electrolyte being co...
08/04/1981
4266942Method for the automatic electro-chemical determination of the end point of a titration
A method for the automatic, electro-chemical determination of the end point of titration utilizing an initial, continuous addition of the titrant, up to a predetermined value, followed by a step-by-step addition with a resting time inserted therebetween f...
05/12/1981
4238297Process for the determination of the content of solid, dissolved and with water immiscible organic substances in water
An automated analysis process and apparatus for analyzing the amount of dispersed water-immiscible solid organic substances in sewage water whereby a precise sample of sewage is taken from a sewage source, admixed with various reagent solutions, including...
12/09/1980
4227887Determination of total organic halides in water
A three phase process for determining total organic halides in water. The first phase is a sorptive process including passing a liquid through a packed bed of sorptive material thereby removing quantitatively, purgeable and non-purgeable, organic halides ...
10/14/1980
4211614Endpoint drift correction for automatic titrations
An apparatus and method are described for automatically correcting drift in automatic titrations, such as coulometric titrations of water. An endpoint detector provides a signal indicative of the state of the titration mixture and the detector signal is m...
07/08/1980
4180440Variable endpoint analyzer
An improved method of potentiometrically titrating a sample to an unknown endpoint or endpoints is disclosed. The method includes delivering a titrant to the sample until an endpoint or endpoints are reached, while continuously monitoring the volume of th...
12/25/1979
4170523Method for checking isolation between titration and electrochemical measuring systems of a chemical analyzer
A method of checking the electrical isolation provided by a gas permeable membrane for a carbon dioxide sensor in an analyzer for simultaneously measuring the carbon dioxide and chloride content of a blood sample as it reacts with a reagent in a sample ce...
10/09/1979
4120657Process of and equipment for the analysis of liquid samples by titration
The invention relates to a process of and equipment for a selective, quick and accurate analysis of liquid samples. According to the process of the invention a liquid or a gas sample absorbed by a liquid is allowed to flow at a constant volume rate and ov...
10/17/1978
4111776Analytical apparatus and processes
In apparatus for coulometric analysis provision is made for an automatic change of electrolyte in the event of certain forms of analytical failure....
09/05/1978
4104028Method of titrating liquor
A method of titrating liquor from a digester comprises removing a portion of the liquor into a sample vessel and using carbon dioxide as a titrant to determine the alkalinity of the liquor....
08/01/1978
4019861Method and apparatus for measurement of CO2 and chloride in body fluids
An improved apparatus and method for detecting CO2 and Cl- in body fluids, such as whole blood, blood serum and plasma, etc. A reagent and a known amount of the sample to be tested react in a vessel to release CO2 into a g...
04/26/1977
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