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光学表面等离子谐振（ＳＰＲ）效应是一种很有效的水质检测技术，经过详细的理论推导，给出了ＳＰＲ反射光强的普遍适用公式。在纯水与受污染水两种情况下，根据一些已知参数计算出结果。由计算结果数据画出的曲线比较表明，ＳＰＲ效应在两种情况下有明显差别。这也正是ＳＰＲ效应用于水质检测的理论根据。
Optical surface plasmon resonance (SPR) is a very effective water quality detection technique. After a detailed theoretical derivation, a general formula for the SPR reflected light intensity is given. In both pure water and contaminated water, the results are calculated based on some known parameters. The comparison of the curves drawn from the calculation result data shows that there is a clear difference in the SPR effect between the two cases. This is also the theoretical basis for the SPR effect for water quality testing.