Direct Thermal Analysis of Solids – A Fast Method for the Determination of Halogenated Phenols and Anisols in Cork


App Note 2/1994

Off-flavors in solid samples often cause analytical problems due to the necessity of sample pretreatment steps such as time consuming extractions followed by re-concentration of the resulting extracts and the danger of producing artifacts related to these methods. In this paper the potential of a direct thermal desorption of the solid sample in combination with an intermediate cryo-focusing step in the inlet-liner of a cooled injection system (CIS/PTV) followed by temperature programmed sample transfer to the analytical column, is discussed and demonstrated. It will be shown that a reliable and fast method for the analysis of halogenated compounds in solid materials can be established without any sample pretreatment.