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<p>[QUOTE=&quot;GDJMSP, post: 3734290, member: 112&quot;]What you linked to is ATR, but the sniifer, as you yourself said is FTIR - big difference. And FTIR is extremely sensitive, right down to the molecular level. So any liquid film, no matter how thin, can and will be detected. </p><p><br /></p><p>The following comes from Thermo Fisher Scientific -</p><p><br /></p><p><i>&quot;These advantages, along with several others, make measurements made by FTIR</i></p><p><i>extremely accurate and reproducible. Thus, it a very reliable technique for</i></p><p><i>positive identification of virtually any sample. The sensitivity benefits enable</i></p><p><i>identification of even the smallest of contaminants.&quot;</i></p><p><br /></p><p><a href="http://tools.thermofisher.com/content/sfs/brochures/BR50555_E_0513M_H_1.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://tools.thermofisher.com/content/sfs/brochures/BR50555_E_0513M_H_1.pdf" rel="nofollow">http://tools.thermofisher.com/content/sfs/brochures/BR50555_E_0513M_H_1.pdf</a></p><p><br /></p><p><br /></p><p>The basics of FTIR - </p><p><a href="https://en.wikipedia.org/wiki/Fourier-transform_infrared_spectroscopy" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Fourier-transform_infrared_spectroscopy" rel="nofollow">https://en.wikipedia.org/wiki/Fourier-transform_infrared_spectroscopy</a>[/QUOTE]</p><p><br /></p>

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