本文研究以1—苯胺基—8—萘磺酸(ANS)作萤光标记测定乙烯基吡咯烷酮—醋酸乙烯酯共聚物组成。测定条件是;ANS浓度为10~(-5)mol/1、共聚物浓度为0.1g/1～0.01g/1,以365nm光激发,溶液为:pH=5.71的磷酸盐缓冲液,测定萤光强度。用校正曲线法测定共聚物组成(乙烯基吡咯烷酮重量百分比由50％～100％)。该方法灵敏度为:6×10~(-3)g/1,相对误差小于6％。 In this paper, the composition of vinylpyrrolidone-vinyl acetate copolymer was determined by fluorescent labeling with 1-anilino-8-naphthalenesulfonic acid (ANS). The measurement conditions were as follows: the concentration of ANS was 10-5 mol / l, the concentration of copolymer was 0.1 g / 1-0.01 g / l, excited at 365 nm, the solution was pH = 5.71 phosphate buffer, brightness. The copolymer composition was determined by the calibration curve method (50% to 100% by weight of vinylpyrrolidone). The sensitivity of this method is 6 × 10 -3 g -1, the relative error is less than 6%.