Abstract − Analytical Sciences, 24(9), 1193 (2008).
Accurate Quantification of Polycyclic Aromatic Hydrocarbons in Environmental Samples Using Deuterium-labeled Compounds as Internal Standards
Nobuyasu ITOH, Masahiko NUMATA, Yoshie AOYAGI, and Takashi YARITA
National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan
For the accurate quantification of polycyclic aromatic hydrocarbons (PAHs) in environmental samples by isotope-dilution mass spectrometry (IDMS) and gas chromatography-mass spectrometry (GC-MS), we used deuterium-labeled PAHs (D-PAHs) as internal standards for µg g-1-level certified reference materials and corresponding calibration solutions. Although pressurized liquid extraction (PLE) causes significant biases in the analytical results for ng g-1-level samples (2.4 - 15%), biases in the analytical results by PLE (190°C, 20 MPa, 2 cycles) were small (<2.3%) and negligible for µg g-1-level samples when expanded uncertainty (coverage factor k = 2) was considered.
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