Question

TMS (tetramethylsilane) is commonly added to Nuclear magnetic resonance (NMR) samples. TMS has a chemical shift which is upfield of most organic signals, and it gives a strong, sharp singlet peak and can be easily removed. Why is TMS added to NMR samples?

Accepted Answer

to calibrate the NMR spectrum

Answer

to reduce noise in the spectrum

Answer

to react with the sample

Answer

to provide a lock signal

Question 2 - Scientific Inquiry and Reasoning (Question Type) Practice Test for the MCAT

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