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利用聚乙烯亚胺法，将Ｃ２型葡萄球菌肠毒素（ＳＥ）抗体固化在未抛光的压电晶体的金电极上，利用双调式振荡电路制作的振荡器，构建压电免疫传感器，其稳定性、特异性都较好。
The polyethylenimine method was used to immobilize the C2-staphylococcal enterotoxin (SE) antibody on the gold electrode of the unpolished piezoelectric crystal. By using a dual-mode oscillator oscillating circuit, a piezoelectric immunosensor was constructed and its stability Specificity is better.