Silica matrix, separation data

Table 3. Chromatographic data from different separations on columns on basis of the same silica matrix comments, see text.

Hntzler et al. in 2011 presented an improved method for PAHs detection in the picogram scale with an LC-APPl-MS/MS method (Hntzler et al. 2011). Sample preparation consisted of Soxhlet extraction or reflnxing in toluene. After evaporation of solvent, the mixture was forwarded to silica SPE cartridges and PAHs were eluted with a 98 2 mixture of n-hexane DCM. LC separation was accomplished on an Envirosep PP colnmn,. LODs of pnre compounds dissolved in solvents were determined in the ranges of 1.5-10.9 pg, while for matrix samples (extracted) in the range of 2.3-72 pg. The application of this method to the analysis of certified SRMs proved that data of both sides were in full agreement. 

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