DETector Engineering and Technology, inc.

ph. 925-937-4203, fax 925-937-7581
e-mail:   detplp@aol.com

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Ion Sources

STRUCTURE OF ION SOURCES - Thermionic sources are small (0.062 inch diameter x 0.40 inch long) ceramic cylinders composed of a loop of wire coated with layers of ceramic materials. Additives in the ceramic determine its activity. Source types are identified as TID-10, TID-2, TID-3, TID-4, TID-5, TID-6, TID-7, and CFID, according to their chemical formulations and their work functions for the emission of thermionic electrons. Also available is an FID Probe consisting of an uncoated loop of wire.

SOURCE MOUNTING CONFIGURATIONS - A standard  mounting is a hexagonal shaped stainless steel flange which fits all DET structures as well as Agilent 6890/7890 and Thermo Trace 1300 NPD structures. Also available is a 1/4 inch tube mounting for use in other customer-designed NPDs such as those in the Thermo Trace Ultra GC and the SRI Instruments GC.

SOURCE RECYCLING SERVICE -  Return depleted DET, Agilent 6890/7890, or Thermo Trace 1300 NPD ion sources to DET for environmental friendly disposal. Twinex connector and Aluminum holder can be reused with other new parts in a RECYCLED ION SOURCE ASSEMBLY priced less than a new source, but with same performance.

PRICES (hex or 1/4 tube mounts with connector): $495 each (new), $460 each (recycled)

Designed Uses of the Ion Source Types:

TID-10, low work function for operation in N2, Air, or O2; detect Oxygenates, some Halogenates and Nitro compounds, and other electronegative compounds; also used for Catalytic Combustion Ionization detection of compounds containing chains of CH2 groups.

TID-2, moderate work function for NPD-like operation in dilute H2/Air; detects N or P compounds with minimal tailing of P peaks.

TID-3, moderate work function for operation in N2, Air, or O2; detects volatile Halogenates.

TID-4, moderate work function for NPD-like operation in dilute H2/Air;  provides the best N response for the NPD.

TID-5, high work function for operation in dilute H2/Air; selective for Br and I.

CFID, high work function for operation downstream of H2/CH4/Air flame; in Remote FID detector provides selectivity for Pb, Sn, P, or Si.

TID-6, high work function for operation in pre-mixed high flow of H2/Air; used in PTID for selectivity and very high sensitivity for P with suppressed N response.


   DETector Engineering and Technology, inc.

 
     Copyright (c) 2001 DETector Engineering and Technology, inc.
486 North Wiget Lane
Walnut Creek, CA  94598 USA
ph. 925-937-4203, fax 925-937-7581
e-mail:   detplp@aol.com