reagent-grade

常见例句

• Unless reagent grade sucrose is available use cane sugar.
  如果没有试剂级的蔗糖，可以用甘蔗糖。
• Reagent pure phosphato-tungstic acid was prepared by reacting sodium tungstate with dis-odium hydrogen phosphate and acidifying with hydrochloric acid.
  由钨酸钠与磷酸氢二钠反应，再经盐酸酸化制得了试剂级的磷钨酸。
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