Simultaneous analysis of iodide and thiocyanate in powder milk using ion chromatography

In this paper,a simultaneous analysis method of iodide and thiocyanate in powdered milk was set up.In this method,iodide and thiocyanate were separated on a highly hydrophilic IonPac AS16 anion-exchange column,and then detected by UV and conductivity detectors which were connected in serial.The results of conductivity detection were used to determine the peak purity of UV detection,and thus guiding the optimization of chromatographic conditions.Then iodide could get best separation with other UV-response compounds,and ultimately through the UV detector to obtain the test results with high sensitivity.The analysis method is rapid,high sensitive,accurate and reliable,and it shows a wide linear range.A viable approach for quality control of dairy products has been developed.