human
Is there a way to tell if a berry is contaminated?
assistant
Yes, there are several ways to test for contamination. One of the most common methods is to use a gas chromatograph mass spectrometer (GC-MS). This method can detect volatile organic compounds (VOCs) that are present in the air and on surfaces. Another method is to use a DNA probe technique called PCR. This method uses small pieces of DNA from the bacteria or fungus to identify it.