Looking for help with interpretation of FTIR transmission plot

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The discussion centers on the analysis of an oil sample that showed contamination with an unspecified element, identified by two different labs using transmission FTIR and absorption FTIR methods. There is confusion regarding the interpretation of the FTIR plots, as one participant notes that FTIR techniques do not directly analyze elements. The thread has been moved due to concerns that the inquiry resembles a homework question. Participants are encouraged to share insights on identifying contamination peaks in the provided FTIR plot. The conversation highlights the challenges in comparing results from different FTIR methodologies.
CambridgeMart
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I've had an oil sample analysed by 2 separate labs; one of the labs came back with the analysis stating large amount of contamination with element X (sorry, I won't prejudice any responses with the element name for now). Unfortunately one lab used transmission FTIR and the other used absorbtion FTIR, so I personally can't equate the traces. Is anyone prepared to have a glance at the plot (poor copy unfortunately) below and ID the major contamination peaks (i.e. something you shouldn't normally find in an ester based oil?
TIA.

1630103907181.png
 
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CambridgeMart said:
contamination with element X
Something doesn't sound right, IR/FTIR doesn't deal with elements.

This is a bit homeworkish so I am moving the thread.
 
Thread 'How to find the pH of a galvanic cell (MIT OCW problem set)'

Thread 'How to find the pH of a galvanic cell (MIT OCW problem set)'

This is the final problem in this problem set from MIT OCW. Here is what I did to try to solve it The table cited in the problem is below We can easily spot the two redox couples that are in the electrochemical cell we are given. The hydrogen-based electrode has standard potential zero, and the silver-based electrode has standard potential 0.22. Thus, the hydrogen electrode, with the lower potential, is the reducing agent (ie, it is where oxidation happens) and is the anode. Electrons...
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