PPB Arsine in Olefins Calibration Standards

Kin-Tek (USA) Trace Source FPK Gas Permeation Tubes are used with FlexStream or Span Pac I Gas Standards Generators to dynamically generate ppb calibration standards of arsine in a matrix of nitrogen, air, or polymerisation grade ethylene or propylene. Concentrations from below 10ppb to over 500ppb can be produced.

FPK Gas Permeation Tubes emit a small, steady flow of arsine vapour that is set by the temperature of the tube. That flow is mixed in the standards generator with a controlled flow of clean matrix gas to form the calibration gas mixture. Mixture concentration is adjusted by changing the matrix gas flow rate. Calibration based on the Standard Additions Principle compensates for unknown residual arsine in the matrix gas.

Trace concentration mixtures of arsine are generally not stable and must be dynamically generated. To minimise the hazard of working with arsine, FPK tubes contain only vapour phase at low pressure. Conventional tubes contain the condensed liquid analyte. FPK tubes can be totally sealed for storage and shipping so that there is no fugitive emission of arsine.