Determination of sulfur and phosphorus contents in scale from vacuum pan by ion-exchange chromatography

An ion-exchange chromatographic method was established to measure major anions in scale deposited in vacuum pan.9 mmol/L of NaOH solution was selected as the eluent,and the contents of SO2-4 and PO34 could be determined exactly at a flow rate of 1.00 mL/min.It showed that this method had a good correlation(r≥0.999 7),the added standard recovery was 100.0%～102.2% and 100.6%～103.4%,respectively,and the detection limit was 0.030 μg/mL and 0.048 μg/mL,respectively.Compared with the results of national standard,the ion-exchange chromatography had better accuracy and reproducibility and it was easy to operate.