Why is My IMS Setup Failing to Detect TNT with a DC Corona Discharge Ion Source?

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Discussion Overview

The discussion revolves around the challenges faced in detecting TNT using an Ion Mobility Spectrometry (IMS) setup with a DC corona discharge ion source. Participants explore potential reasons for the failure to obtain spectra for TNT, while successfully detecting other explosives like RDX and PETN.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that their IMS setup can detect RDX and PETN at low concentrations but fails to detect TNT, prompting a request for explanations.
  • Another participant suggests that there may be an issue with the drift tube, speculating that something might be quenching the ions within it.
  • A later reply expresses gratitude for receiving an answer but does not specify what the answer is.
  • Another participant requests that the answer be shared for the benefit of others in the research community.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the reasons for the failure to detect TNT, and multiple hypotheses regarding potential issues remain unverified.

Contextual Notes

The discussion lacks specific details about the conditions under which the IMS setup operates, including any assumptions about the ion source or drift tube configuration that may affect detection capabilities.

matlabma
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I have built an IMS setup to detect explorsives such as RDX,PETN,etc. the setup can have the RDX and PETN spectra even in a much low concentration,but when for TNT detection,it fails to have any spectra.I want to know why?
using a DC corona discharge as an ion source
 
Last edited:
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matlabma said:
I have built an IMS setup to detect explorsives such as RDX,PETN,etc. the setup can have the RDX and PETN spectra even in a much low concentration,but when for TNT detection,it fails to have any spectra.I want to know why?
using a DC corona discharge as an ion source
Try searching Google with "Ion mobility spectrometry, IMS, TNT" and check the journal articles that appear.
 
sorry,can not find the reasons,may be,something wrong in the drift tube,something in the tube quenching the ions?
 
thank you GOD!I got the answer
 
Would be nice of you to share the answer for us rabid researchers
 

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