An On-Line Solid Phase Extraction-Liquid Chromatography-Tandem Mass Spectrometry Method for the Determination of Perfluoroalkyl Acids in Drinking and Surface Waters

Figure 2

Schematic representation of the on-line SPE system used. (a) Loading of the sample into the high volume loop. (b) Transfer of the sample from the injection loop to the preconcentration column. (c) Transfer of the analytes retained in the preconcentration column to the chromatographic column.

(a)

(b)

(c)