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As a result, core / proton sensed terrain mengenainya.Setiap reduction of protons in the nucleus or molecule has a chemical environment berbeda.Perbedaan in resonance frequency is very small, so it is difficult to precisely measure the proton resonance frequency faithful. Therefore the use of compounds were added in the frequency standard solution of the compound to be measured, and each proton resonance frequency in the sample is measured relative to the resonance frequency of the proton-proton standard compounds (Soekamto. 2008).
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