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。
