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目的 为了检验一次性塑料平皿在沉降法测定空气细菌中的可靠性。方法 用玻璃平皿作为对照 ,对一次性塑料平皿和玻璃平皿进行配对设计检验。结果 两种平皿采样结果差异有显著性 (P<0 .0 1) ,且一次性塑料平皿采样结果偏低。结论 静电可能导致一次性塑料平皿采样结果低于玻璃平皿 ;建议空气细菌监测规范中应对平皿材质加以注明。
Aim To test the reliability of disposable plastic dishes in the determination of airborne bacteria by the sedimentation method. Methods Using glass dishes as a control, paired design tests were performed on disposable plastic dishes and glass dishes. Results There was a significant difference (P <0.01) in the results of the two dishes, and the results of the disposable plastic dish were low. Conclusion Electrostatic discharge may result in a one-time plastic plate sampling results lower than the glass plate; it is recommended to specify the plate material in the airborne bacteria monitoring specification.