Abstract Fruit is not only delicious, but it also contains iron, potassium, magnesium, and other microelements necessary for the human body. Banana, pineapple and kiwifruit were selected as samples for testing. A laser with a wavelength of 532 nm was focused on the samples’ surface to generate a plasma. The emission spectrum of the atoms and ions in the plasma were collected by optical receivers, and the optimal condition was confirmed by analyzing the signal-to-noise ratio. The electronic temperature characteristics of the Fe plasma were studied under optimal experimental conditions. The maximum electron temperature of the Fe plasma occurred after a time delay of 300 ns in bananas, after 400 ns in pineapples and after 400 ns in kiwifruit. The electronic temperature of the Fe plasma increased with the time delay before the maximum point was reached. However, the temperature decreased after the maximum point was reached. At the beginning of the decline, the plasma decreased rapidly, but later decreased slowly. The range of the variation of the electron temperature of the Fe plasma in bananas, pineapples, and kiwifruits was 12388.29–19958.3 K, 11994.21–16856.4 K, and 13388.2–19607.32 K, respectively.

中文翻译：

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激光诱导水果中铁等离子体的电子温度特性

摘要 水果不仅美味可口，还含有铁、钾、镁等人体必需的微量元素。选择香蕉、菠萝和猕猴桃作为样品进行测试。波长为 532 nm 的激光聚焦在样品表面以产生等离子体。等离子体中原子和离子的发射光谱由光接收器收集，并通过分析信噪比确定最佳条件。在最佳实验条件下研究了 Fe 等离子体的电子温度特性。Fe 等离子体的最高电子温度出现在香蕉中 300 ns 的时间延迟之后，菠萝中 400 ns 之后和猕猴桃中 400 ns 之后。Fe 等离子体的电子温度在达到最大值之前随着时间延迟而增加。然而，在达到最高点后温度下降。下降初期，血浆下降较快，后期下降较慢。香蕉、菠萝和猕猴桃中 Fe 等离子体的电子温度变化范围分别为 12388.29-19958.3 K、11994.21-16856.4 K 和 13388.2-19607.32 K。