stoichiometric impurity

例句：

1. 1. The chemical analysis of the samplerevealed a stoichiometric impurity in the compound.
   对样本的化学分析显示化合物中存在化学计量杂质。
2. 2. Theprocess requires careful control to avoid stoichiometric impurities that could affectthe final product.
   该过程需要严格控制以避免可能影响最终产品的化学计量杂质。
3. 3. In theproduction of fertilizers, itis essential to remove stoichiometricimpurities before the final blendingstage.
   在生产肥料时，必须在最终混合阶段之前去除化学计量杂质。