Foss Analytical A/s

Ahmed Fadil

Daniel Aden

Daniel ADÉN

An organic material sample is prepared for LIBS analysis based on searing a sample of granular organic material having an organic matrix. The searing includes supplying heat to the sample for one or more known exposure times to produce a same number of searing instances, measuring reflectance values of the sample before and after one or more of the searing instances, determining a searing parameter as an indicator of a susceptibility of the organic matrix to searing determined based on the measured reflectance values, calculating a time value from an application of a predictive model derived from an empirical analysis of reference data comprising time values indexed against searing parameter to the searing parameter, the predictive model linking the searing parameter to the time value, generating a new exposure time using the time value, and heating the sample for the new exposure time to produce a new searing instance.

Method of preparing an organic material sample for LIBS analysis and a searing device for use in the same

A LIBS analysis system comprises a focusing lens arrangement having a focal plane; a laser for propagating a laser beam through the focusing lens arrangement to be focused at the focal plane; a detector for generating an output that is proportional to an intensity of incident electromagnetic radiation that is incident on the detector; a translation mechanism configured to cause a relative movement of the sample holder and the focusing lens arrangement to vary a position of the focal plane along the optical path with respect to the sample holder; and a controller configured to automatically control the translation mechanism to cause the relative movement of the sample holder and the focusing lens arrangement to achieve an optimum position at which the focal plane and an analysis region of the upper surface intersecting the optical path are at or are close to coincidence.

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Hilleroed, Denmark

Ahmed Fadil