The main problems in determination of gold by the back titration for the excessive FeSO4 with potassium bichromate were discussed and experimented. 對重鉻酸鉀滴定過(guò)量硫酸亞鐵返滴定法測定金合金中金的主要問(wèn)題做了探討和實(shí)驗。
The effective composition content of poly-alcohol was measured by back titration using NaPTB complex-salt which originated from analysis method of nonionic surfactant. 本文引用非離子表面活性劑分析方法中的四苯硼鈉絡(luò )鹽返滴定法測定了聚合醇有效成分的含量。
