Blos Nitrogen-phosphorus Detector (NPD)

Nitrogen-phosphorus detectors (NPD) for gas chromatography are specific to nitrogen- or phosphorus-containing compounds and are well suited for environmental and forensic applications. A key component to NPD performance is its bead.

The Blos bead has very high operational stability and long lifetime. The Blos bead for the Agilent NPD is based on a high-performance glass material technology.

Product details Related Product


  • Blos bead has a longer bead lifetime (more than 2x) than ceramic bead.
  • More stable operation throughout the bead’s lifetime
  • For nitrogen containing compounds – similar sensitivity and selectivity specifications
  • For phosphorous containing compounds – superior sensitivity and selectivity specifications
  • Superior resistance to ambient humidity and moisture




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