摘要:
A system and method for quantitatively characterizing moisture content of an at least partially hydrophobic fluid sample. The method includes providing a dry solution of an aprotic solvent, adding at least a part of the fluid sample to the solvent to produce an extract-sample, performing infrared spectroscopic testing on the extract-sample to generate absorbance data representing at least one absorbance characteristic of the extracted sample, and generating moisture data for the sample based on the extracted sample data. The system includes a cell for holding and evaluating an extracted sample, an infrared spectrometer for measuring infrared absorbance characteristics of the extracted samples, a computer equipped with software for analyzing data outputted by the infrared spectrometer and utilizing an empirical model to derive at least one calibration equation relating data representing the absorbance characteristics of the extract-sample to unit moisture concentration, and converting the unit moisture concentration to a measure of moisture content of the sample. The method also utilizes D2O to characterize moisture content of the extraction solvent, and compensate for both moisture content of the extraction solvent and matrix effects stemming from miscibility of the hydrophobic fluid in the extraction solvent.
摘要:
A system and method for quantitatively characterizing moisture content of an at least partially hydrophobic fluid sample. The method includes providing a dry solution of an aprotic solvent, adding at least a part of the fluid sample to the solvent to produce an extract-sample, performing infrared spectroscopic testing on the extract-sample to generate absorbance data representing at least one absorbance characteristic of the extracted sample, and generating moisture data for the sample based on the extracted sample data. The system includes a cell for holding and evaluating an extracted sample, an infrared spectrometer for measuring infrared absorbance characteristics of the extracted samples, a computer equipped with software for analyzing data outputted by the infrared spectrometer and utilizing an empirical model to derive at least one calibration equation relating data representing the absorbance characteristics of the extract-sample to unit moisture concentration, and converting the unit moisture concentration to a measure of moisture content of the sample. The method also utilizes D2O to characterize moisture content of the extraction solvent, and compensate for both moisture content of the extraction solvent and matrix effects stemming from miscibility of the hydrophobic fluid in the extraction solvent.
摘要:
A system and method of quantitatively characterizing base content of a hydrophobic fluid. The method includes providing a base neutralizing solution including an alcohol (preferably selected from the group consisting of 1-propanol, ethanol, methanol, and mixtures thereof), and mixing the solution with known amounts of a base to produce a number of calibration mixtures. Infrared spectroscopic testing is performed on the calibration mixtures to derive corresponding spectrum data. The spectrum data is processed to solve for a calibration equation that relates a spectral property measurable at a predetermined wavelength to a measure of base concentration per unit volume. The base neutralizing solution is also mixed with the hydrophobic fluid to produce a sample-extract. Infrared spectroscopic testing is performed on the sample-extract to derive corresponding spectrum data. The spectrum data for the sample-extract is processed to measure the spectral property of the calibration equation. The measured spectral property of the sample-extract is input to the calibration equation in order to output a measure of base concentration per unit volume for the sample-extract. A measure of base content of the hydrophobic fluid can be derived from the base concentration per unit volume for the sample-extract. The measure of base content of the hydrophobic fluid sample is derived without splitting of the hydrophobic fluid sample. The system includes a cell for holding and evaluating an extracted sample, an infrared spectrometer for measuring infrared absorption characteristics of the extracted samples, a computer equipped with software for analyzing data outputted by the infrared spectrometer.