METHOD OF ANALYSING GAS CHROMATOGRAPHY DATA
First Claim
1. A method of determining an operating condition of a gas chromatograph comprising:
- receiving a first response factor data set acquired from a gas chromatograph (GC) apparatus during a procedure on a calibration or reference gas sample at a first time;
receiving one or more additional response factor data sets acquired from the gas chromatograph apparatus during a procedure on a calibration or reference gas sample from one or more later times, wherein the one or more later times are during an operational period of the gas chromatograph apparatus;
calculating a measure of uncertainty for at least one compound of the reference gas sample from the first and additional response factor data sets;
wherein calculating a measure of uncertainty comprises calculating a relative sensitivity of a desired gas property to a change in concentration of at least one compound; and
comparing the calculated measure of uncertainty to a predetermined threshold value to determine an operating condition of the GC apparatus.
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Abstract
A method of analysing gas chromatography data is described. The method, a first response factor data set acquired from a gas chromatograph (GC) apparatus during a procedure on a calibration or reference gas sample at a first time is received. One or more additional response factor data sets acquired from the gas chromatograph apparatus during a procedure on a calibration or reference gas sample from one or more later times are received. The method comprises calculating a measure of uncertainty for at least one compound of the reference gas sample from the first and additional response factor data sets. The one or more later times are during an operational period of the gas chromatograph apparatus. The measure of uncertainty may be used to, for example, identify the necessity to perform a maintenance action in the GC or to assess whether the GC is in a healthy or unhealthy condition.
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Citations
19 Claims
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1. A method of determining an operating condition of a gas chromatograph comprising:
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receiving a first response factor data set acquired from a gas chromatograph (GC) apparatus during a procedure on a calibration or reference gas sample at a first time; receiving one or more additional response factor data sets acquired from the gas chromatograph apparatus during a procedure on a calibration or reference gas sample from one or more later times, wherein the one or more later times are during an operational period of the gas chromatograph apparatus; calculating a measure of uncertainty for at least one compound of the reference gas sample from the first and additional response factor data sets; wherein calculating a measure of uncertainty comprises calculating a relative sensitivity of a desired gas property to a change in concentration of at least one compound; and comparing the calculated measure of uncertainty to a predetermined threshold value to determine an operating condition of the GC apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19)
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18. A method of determining an operating condition of a gas chromatography comprising:
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receiving a first response factor data set acquired from a gas chromatograph apparatus during a procedure on a calibration or reference gas sample at a first time; receiving one or more additional response factor data sets acquired from the gas chromatograph apparatus during a procedure on a calibration or reference gas sample from one or more later times; wherein the one or more later times are when the gas chromatograph apparatus is in situ or on site in a gas sample analysis facility; calculating a measure of uncertainty for at least one compound of the reference gas sample from the first and additional response factor data sets; and comparing the calculated measure of uncertainty to a predetermined threshold value to determine an operating condition of the GC apparatus.
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Specification