New rapid test for melamine in milk
Swiss researchers have developed a test that can detect melamine in milk within 30 seconds. The new technique dramatically reduces the length of time needed to deliver a result: current methods take between 20 and 60 minutes. The test, developed at the Federal Institute of Technology in Zurich, uses ultrasound to turn the milk into a fine spray before being ionized using a technique called extractive electrospray ionization (EESI) and analyzed using mass spectrometry. The researchers are now working on a way of making the method usable in the field. They hope to develop a portable device that could test milk while it is being processed.