trivalent impurity

例句：

1. 1.The chemical analysis revealed that the sample contained a small amount of trivalent impurity.
   化学分析显示，样本中含有少量的三价杂质。
2. 2.In the production process, it is important to control the trivalent impurity levels to ensure product quality.
   在生产过程中，控制三价杂质水平以确保产品质量是非常重要的。
3. 3.The research focused on identifying and eliminating trivalent impurities in the raw materials to improve the final product's performance.
   该研究专注于识别并消除原材料中的三价杂质，以提高最终产品的性能。