1. The scientist used a polarographic technique to analyze the concentration of ions in the solution.
科学家使用了极谱技术来分析溶液中离子的浓度。

2. The polarographic sensor detected a change in the oxygen levels in the water.
极谱传感器检测到水中氧气水平的变化。

3. The polarographic method is commonly used in environmental monitoring.
极谱法在环境监测中被广泛使用。

4. The student conducted a polarographic experiment to determine the metal content in the sample.
学生进行了一项极谱实验，以确定样品中的金属含量。

5. The polarographic analysis revealed the presence of contaminants in the soil sample.
极谱分析揭示了土壤样品中污染物的存在。

6. The researcher used a polarographic instrument to measure the electrochemical activity of the compound.
研究人员使用了一台极谱仪器来测量化合物的电化学活性。