I am working with TEMPO oxidized nano cellulose films and its composites. So when I am doing the FTIR of the same I am getting multiple inverted peaks. I have checked the machine with other samples and they are getting fine results.
Alan F Rawle actually i am conducting the analysis in the atr mode and before starting i am taking the background
Sangeeta Sankhla
I know you're taking a background - the question is how did you take the background? Was the background air or a sample substrate? As Ibukun OLUWOYE says you may have little or no signal. Inverted peaks are normally a sign of over-background subtraction (i.e. the background higher than the signal). This can arise from the power to the sample being higher than the power when the background was measured.
Alan F Rawle and Ibukun OLUWOYE Thank you so much. I redid the analysis with proper consideration to the background. Now I got good results.
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