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US 6,113,261 AGranted
Method and apparatus of modulated-temperature thermogravimetry
AssigneeTA Instruments, Inc.
InventorRoger L. Blaine
Life of this patent
Estimating the term…
Abstract
A method for controlling a thermogravimetry experiment and for quantitatively determining kinetic constants for decomposition or volatilization reactions using periodic forcing (modulated) temperature functions. A temperature program having a linear part and a periodically varying part superimposed thereon is applied to a sample in a thermogravimetric analyzer. The resulting mass signal is deconvoluted, or separated, into one or more deconvoluted signals.
Claims81
A thermogravimetric analyzer (TGA), comprising:
- a sample holder into which a sample to be analyzed is placed;
- means for selecting a temperature program that can be characterized by an amplitude, a modulation period or a modulation frequency and an underlying heating rate;
- an oven to vary the temperature of said sample according to said temperature program;
- means for obtaining a weight information signal indicative of weight information of said sample over time due to heating according to the temperature program;
- processor means for determining at least one kinetic parameter using said weight information signal.
2 more elements
A method for analyzing a sample, comprising the steps of:
- placing the sample in an oven;
- varying temperature of said sample according to a temperature program that can be characterized by a modulation amplitude, modulation period and an underlying heating rate;
- obtaining weight information of said sample over time as a weight information signal;
- and
- determining at least one kinetic parameter using said weight information signal.
2 more elements
A thermogravimetric analyzer, comprising:
- a sample holder into which a sample is placed;
- an oven to heat the sample according to a temperature program that can be characterized by an amplitude and a period and an average temperature;
- an electrobalance to determine weight information of the sample as it is heated according to the temperature program;
- and
- a computer to obtain the weight information and determine at least one kinetic parameter based on the weight information.
2 more elements
A method for analyzing a sample, comprising:
- placing the sample into a sample holder;
- heating the sample according to a temperature program that can be characterized by an amplitude, a period and an average temperature;
- determining weight information of the sample as it is heated according to the temperature program;
- and
- obtaining the weight information in computer;
- and
- using the computer to determine at least one kinetic parameter based on the weight information.
4 more elements
A thermogravimetric analyzer for analyzing a sample, comprising:
- a sample holder into which to place the sample;
- an oven for heating the sample according to a temperature program having at least one segment, wherein each segment can be characterized by a modulation amplitude and a modulation period;
- a balance to determine a weight information signal indicative of weight information of said sample as it is heated according to the temperature program;
- and
- a computer to determine a kinetic parameter using the weight information signal.
2 more elements
A method for analyzing a sample, comprising:
- placing the sample in a sample holder;
- heating the sample according to a temperature program having at least one segment, wherein each segment can be characterized by a modulation amplitude and a modulation period;
- determining a weight information signal indicative of weight information of said sample as it is heated according to the temperature program;
- and
- determining a kinetic parameter using the weight information signal.
2 more elements
A system for analyzing a sample, comprising:
- a sample holder into which the sample is placed;
- an oven for heating the sample according to a temperature program characterized by a modulation amplitude, a modulation frequency and an underlying heating rate, wherein the underlying heating rate varies with time;
- a detector for detecting weight information of the sample when it is heated according to the temperature program;
- a computer for determining a kinetic parameter from the weight information;
- and
- a controller for varying the underlying heating rate in accordance with the determined kinetic parameter.
3 more elements
A method for analyzing a sample, comprising the steps of:
- placing the sample in a sample holder;
- heating the sample according to a temperature program characterized by a modulation amplitude, a modulation frequency and an underlying heating rate, wherein the underlying heating rate varies with time;
- detecting weight information of the sample when it is heated according to the temperature program;
- determining a kinetic parameter from the weight information;
- and
- varying the underlying heating rate in accordance with the determined kinetic parameter.
3 more elements
A thermogravimetric analyzer for analyzing a sample, comprising:
- a sample holder into which the sample is placed;
- an oven to heat a sample;
- a computer to control the oven to heat the sample according to a temperature program that can be characterized by a modulation amplitude and a modulation frequency;
- a detector for determining weight information of the sample as the sample is heated according to the temperature program;
- and
- means for transmitting the weight information to a personal computer that determines a kinetic parameter using the weight information.
3 more elements
A method for analyzing a sample, comprising the steps of:
- placing the sample in a sample holder;
- heating the sample according to a temperature program that can be characterized by a modulation amplitude and a modulation frequency;
- detecting weight information of the sample as the sample is heated according to the temperature program;
- and
- transmitting the weight information to a personal computer that determines a kinetic parameter using the weight information.
2 more elements
A system for analyzing a sample, comprising:
- a sample holder into which the sample is placed;
- a temperature program having a plurality of linear segments to heat the sample;
- a detector to determine weight information of the sample as it is heated according to the temperature program;
- and
- a computer to determine a kinetic parameter based on the weight information.
2 more elements
A method for analyzing a sample, comprising:
- placing a sample into a sample holder;
- creating a temperature program having a plurality of linear segments;
- heating the sample according to the temperature program;
- determining weight information of the sample as it is heated according to the temperature program;
- and
- determining a kinetic parameter based on the weight information.
3 more elements
Dependencies are inferred from the claim text.