1. philip clarke philip clarke Australia says:

    I can’t see how an NMR of urine would work?
    1. Since there would be at least 1000x water protons to organic matter protons - the signal would be swamped
    If they do extract the urine - then surely this makes it technically less accurate
    2. There would be thousands of different molecules in a typical urine. Is there an LC or GC or LCMS step prior to collecting the NMR spectrum? If it’s area under the curve calculations then how can you be sure the signal is due to tartaric acid as suggested in the article?

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