Determination of Ammonia in Water-based Adhesive for Polypropylene Tow Filter Rod Forming

In order to rapidly and accurately determine the ammonia in water-based adhesive for polypropylene tow filter rod forming, the method for demulsification of the adhesive and the conditions for continuous flow analysis were investigated. The results showed that:1)The adhesive sample was treated with saturated sodium chloride in 2. 5% sulfuric acid solution to obtain the clear filtrate for ammonia determination;2)The proper conditions for continuous flow analysis were the optical path of flow cell 50 mm, duration for sample injecting and cleaning 90 seconds each;3)The limit of detection and the limit of quantification of ammonia were 0.22 and 0.73 μg/mL, respectively;the recovery ranged from 99.02% to 102.89% with the CV below 2%. It was concluded that this method was suitable for the determination of ammonia in water-based adhesive.