１６允许差取平行测定结果的平均值作为树脂含氮量的测定结果，其允许相对偏差不大于５％。２树脂中糠醇含量的简便测算２１脲醛呋喃树脂中糠醇含量与含氮量存在着一次函数ｙ＝ｋｘ＋ｂ的关系，用下列公式即可计算出树脂中的糠醇含量：ＦＡ％＝（９５－５Ｎ）％式中ＦＡ———树脂中糠醇的百分含量；Ｎ———树脂中的含氮量。２２用计算出的含氮量对照图２即可查得树脂中的糠醇含量。图２糠醇百分含量与含氮量的关系２３亦可用计算出的含氮量对照下表查得树脂中的糠醇含量。表糠醇含量与含氮量对照表％Ｎ１２３４５６７８９ＦＡ９０８５８０７５７０６５６０５５５０收稿日期：１９９７—０３—１５ 1  6 to allow the difference to take the average of parallel determination results as the determination of resin nitrogen content, which allows the relative deviation of not more than 5%. 2 resin, furfuryl alcohol content of a simple calculation 2  1 Furfural alcohol content of urea furfural resin and nitrogen content of a linear function of the relationship y = kx + b, the following formula to calculate the resin content of furfural alcohol: FA% = (95- 5N)% Where FA --- resin in the percentage of furfuryl alcohol; N --- resin nitrogen content. 2  2 with the calculated nitrogen content in Figure 2 can be found in the resin furfural alcohol content. Figure 2 furfuryl alcohol content and nitrogen content of 2 3 can also be calculated with the nitrogen content of the control table to find the furfural alcohol content. Table furfural alcohol content and nitrogen content table% N123456789FA908580757065605550 Received Date: 1997-03-15