Imagine you have to quickly figure out just what liquid is inside a bottle. The container might be opaque, or even metal. You can’t open it, and you can’t trust what is on the label. That scenario is faced in airports, at border crossings, and in response to hazardous-material or bomb scares. Moreover, the need to accurately identify liquids is common in quality control of everything from medicine to cosmetics to foods.

It turns out that by combining nuclear magnetic resonance (NMR) and x-ray imaging, scientists can meet the challenge of liquid identification more reliably than with either technique alone.

 

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