Metal-Free Centrifuge Tubes

The metal-free centrifuge tubes are made of transparent polypro- pylene (PP). They have been specially treated to ensure that more than 30 kinds of trace metal elements that can interfere with experiments are kept at levels of less than 1ppb (ICP-MS method). They are ideal for a variety of environmental tests such as water analysis, and other applications where samples may be contaminat- ed by heavy metals in centrifuge tubes.