Handheld paper spray ionization mass spectrometry for direct analysis of Ningxia goji berry.

Summary: Have you ever wondered if the expensive goji berries you bought are truly from the famous Ningxia region? Scientists have created a cool, handheld tool to find out! They built a tiny power supply that connects to a machine called a mass spectrometer. By just testing a small piece of paper with the berry juice on it, they can see exactly what is inside the berry. They found 156 different parts like sugars and vitamins. Using a smart computer program, they could easily tell the difference between Ningxia berries and others. This makes testing food fast, easy, and possible to do right on the farm!