The tetraphenylboron sodium gravimetric method must be employed when K2O is higher in compound fertilizer for enough accuracy.

当复混肥中K2O含量较高时,仍宜用量法测定含量。

METHODS Sodium tetraphenylboron gravimetric analysis was replaced by highly-accurate nephelometric titrimetry to determine potassium chloride in Compound sodium chloride injection.

方法用高精度散射光度滴定法代替钠量法。