Discussion
Which of the following statements is not correct regarding radionuclide analytical methods ?
Answer: B
The statement that is not correct is Synthesis of labelled compound is easy.
Preparing a compound labelled with a radionuclide is one of the recognised drawbacks of radiochemical methods: the synthesis is often difficult and costly, and it must be done quickly with short-lived isotopes and with radiation safeguards.
The other statements are true. Radioactive decay is a nuclear process, so the signal does not depend on temperature, pressure or the chemical form of the atom. Because counts follow known statistics, the counting precision can be fixed in advance by choosing the counting time. And a sample made radioactive or mixed with a tracer cannot simply be returned to normal use afterwards.
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