Breath VOC Levels Measured Using PTR-MS versus Blood Concentrations

7 Breath VOC Levels Measured Using PTR-MS versus Blood Concentrations 

Another interesting observation was that the breath concentrations taken over a period of time showed far less inter-subject variability than the concentrations determined from the blood measurements, which is speculated to be due to a large volume of blood having flowed through the lungs over the observation period. This inter-subject variability is illustrated 

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