Determination of Fluoride and Chloride in Complex Fertilizer by Ion Chromatography
Gong Ning;Cheng Huapeng;Chen Quan;Wu Changwei;Shao Qingsong;Institution of Supervision and Inspection Product Quality of Guizhou Province;
The content of fluoride and chloride ions in composite fertilizer was determined by ion chromatography. Water bath ultrasonic 30 min, the centrifugal, taking the supernatant by 0. 22 microns in diameter drainage membrane filter,ion chromatograph on determination of fluorine ion and chloride ion,through AG19 protect column and AS19 separation column separation,as the eluent of 20. 00 mmol · L~(-1) potassium hydroxide solution,detecting it by continuous automatic regeneration chemical suppressor.F and Cl concentration within 0.02 ~ 20 mg/L has a linear relation with the peak area,the linear correlation coefficient is 0.9991 ~ 0.9991,relative standard deviation( RSD) is 0.15% ~ 0.17%,the method of recovery is 96.5% ~ 97.3%,and satisfies the requirement of analysis.
【CateGory Index】： O657.7;TQ444