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EPA Method 8260C Using CDS Analytical 7000C Purge and Trap

CDS Analytical’s 7000C Purge and Trap concentrator designed for PAL System fully automates Purge and Trap for the trace measurement of purgeable volatile organic compounds (VOCs) in water, compliant with the official International Standard Organization method DIN-EN ISO 15009, US EPA method 500 and 8000 series for VOCs in water. In this application note data is presented that the 7000C/PAL System exceeds the performance criteria set of EPA Method 8260C.

Figure 1 is the Total Ion Chromatogram (TIC) of a 200 μg/L calibration standard with internal standard and surrogates at total of 64 compounds mix. All of the analytes are adequately resolved chromatographically. The chromatogram of the six gases is enlarged in the insert in order to show the excellent separation and peak shapes.

Figure 1. TIC of 8260C volatile organic standard mix at 200μg/L with enlarged chromatogram of the six gases.
Figure 2. Overlap of eight 1,4-Dichlorobenzene-d4 runs from the internal standard module. The retention time of each peak has been shifted 1.2 seconds to show the consistency of the peak shape.
Figure 3. RRF comparison for 8260C compounds between type X trap and type K trap.
Table 1. Reproducibility of Internal Standard Addition.

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