The NPD for the 7890/6890 GC features a ceramic bead selective for nitrogen and phosphorous compounds. All Agilent NPD beads are preconditioned and come with a proof-of-performance chromatogram. The redesigned NPD bead is self-aligning for easy installation.
Like the FID, there are two types of NPD available. The capillary optimized NPD is only used with capillary columns and the adaptable NPD fits packed columns and can be adapted to fit capillary columns.
The NPD Bead Assembly (2715K82) is more sensitive but exhibits some tailing for phosphorous compounds.
The NPD Black Bead Assembly (2714R82) is potentially a little less sensitive but does not exhibit peak tailing and typically has longer lifetime.
NPD Ceramic Insulator Kit (2714R33) includes a two Metal C-rings (top and bottom) and two Alumina insulators (upper and lower).
The Nitrogen-Phosphorus Detector Sample (2713Y21) is used for the HP 5880, 5890 and 6890 with a NPD. Solution of 0.65 ppm azobenzene, 1,000 ppm octadecane, and 1.00 ppm malathion in isooctane (w/v). Three 0.5 ml ampules.
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