A chromatogram decomposition method and its associated calibration for quantitative analysis

Area of Science:

• Analytical Chemistry
• Chemical Engineering

Background:

• Gas Chromatography (GC) is a key analytical technique.
• Accurate quantification of gas mixtures is essential for various industrial applications.
• Existing methods may face challenges in resolving complex mixtures or wide concentration ranges.

Purpose of the Study:

• To introduce a new chromatogram decomposition method for Gas Chromatography.
• To develop a technique capable of accurately quantifying multiple gas components.
• To validate the method's performance with challenging sample compositions.

Main Methods:

• Representing chromatograms as a sum of template functions derived from mass balance equations.
• Approximating single-gas responses using these template functions.
• Utilizing temporal translation and dilation for approximating responses of other gases.

Main Results:

• Successful demonstration on laboratory data with C1-C5 mixtures.
• Linear calibration curves were sufficient for estimating C1-C5 concentrations.
• The method showed robust performance in a ratio test with a 300-fold concentration difference between C1 and C2/C3.

Conclusions:

• The proposed chromatogram decomposition method offers a robust approach for GC analysis.
• The technique is effective for quantifying mixtures with wide concentration variations.
• This method has the potential to improve the accuracy and efficiency of gas mixture analysis.