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.
关键词
离子色谱电导检测水基胶黏剂氨
Keywords
ion chromatographyelectrical conductivity detectorwater-borne adhesivesammonia