The method of preparing cobalt blue pigment in the liquid phase was studied by using urea as homogeneous precipitatingagent.
研究了用尿素为均匀沉淀剂，在液相中制备钴蓝颜料的方法。
2
Method: Same mobile phase and detection wavelength were selected and suitable precipitatingagent was used. The HPLC conditions were optimized.
方法：选择相同的流动相和检测波长，采用适当的沉淀剂，对四种添加剂的检测条件进行了优化。
3
This paper discusses the effects of sample resting when precipitatingagent is added on experiment results by using EDTA volumetric method for the determination of SO 2- 4 in water.