Determination of Ammonia in Water borne Adhesives by Ion Chromatography

KeyWord:ion chromatography  electrical conductivity detector  water-borne adhesives  ammonia

Abstract:

      An ion chromatographic(IC) method was developed for the quantitative analysis of ammonia in water borne adhesives.After extracted with 10 mmol/L hydrochloric acid and purified by oscillation centrifugation and filtration,the ammonia was separated by ion chromatography and detected with electrical conductivity detector.The results showed that the ammonia had a good linearity(r2=0.999 8) in the range of 0.05-2.0 mg/L.The detection limit(S/N=3) was 0.007 mg/L and the quantitation limit(S/N=10) was 0.024 mg/L.The average recoveries were between 93% and 102% with relative standard deviations not more than 4.3%.The analysis of real samples verified the reliability of this method.The stability test of ammonia results suggested that the processed samples should be measured in 12 h.