Determination of Si and Si Migration into Infusion of 5-Layer Co-extrusion Bags by ICP-MS

OBJECTIVE To develop a method for determination of Si and Si migration into infusion of 5-layer co-extrusion bags by ICP-MS. METHODS The sample was digested by microwave digestion, the content of Si was determined by ICP-MS under certain working conditions. RESULTS Si had a linear range between 1.5-5.0 μg·mL^-1(r=0.999 5). The average recovery of Si was 98.4%(RSD=2.3%). CONCLUSION This method is accurate, sensitive and simple, it can be used for determination of Si and Si migration into infusion of 5-layer co-extrusion bags.