A Robust TD–GC–MS Method for the Determination of Trace-level Phthalate Esters in Air – Method Validation and Field Study

Markes-trace-level-phthalate-esters-in-air

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This study describes the performance of Markes’ thermal desorption (TD) systems for the GC–MS analysis of trace-level phthalates in air. The advantages of thermal desorption compared to conventional air monitoring methods for semi-volatiles are discussed. In addition, it is demonstrated how Markes’ innovative sample re-collection functionality facilitates TD method development by validating quantitative recovery of these challenging analytes all the way through the TD system. Excellent analytical precision, with RSDs <5% for all compounds, is shown and an independent field investigation of phthalate levels in urban air in Belgium is highlighted, which reported very high linearities (R2 ≥0.998), and limits of detection <0.23 ng/m3.

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