Aiming at the influence of the flotation reagent on KCl flotation in industrial production

the best experimental condition of the determination of the octadecylamine(ODA) content in brine from KCl flotation by spectrophotometer with bromocresol green(BCG) as indicator is studied.The results indicate: the molar absorptivity of the complex of ODA and BCG is 1.4×104 L/(mol·com) at wave length of 414 nm

Beer's law is obeyed in the range of 1×10-5～10×10-5 mol/L;the relative error of ODA is about-1.94%

with RSD=1.54%.This method applied to the determination of ODA in brine samples of KCl flotation is more stable

simple sensitive

accurate

cheap and easy to get required reagent

simple and quick to operate

which provides an effective method for trace analysis of ODA

and has a certain application value.