摘要
本试验通过测定不同ＮａＣｌ浓度的蔗糖液的旋光度，对Ｃｌ－的影响进行了回归分析研究。得回归方程αｉ＝－０．００７９６８Ｃｉ＋０．０１９４８相关系数ｒ＝－０．９７４６，表明有极显著的负相关。对于精度为士０．０５°Ｄ的圆盘旋光仪，当ＮａＣｌ浓度＜８．７２％时可忽略Ｃｌ－的影响；对于精度为士０．０１°Ｓ的验糖仪，当ＮａＣｌ浓度＜２．８８％时可忽略Ｃｌ－的影响。本试验结果表明二次旋光法测蔗糖含量时，ＨＣｌ水解时发生的Ｃｌ－影响可忽略不计，因此可省去水解前旋光度测定加ＮａＣｌ这一操作。
By determining the optical activity of different NaCl concentration in sucrose solution,the regression analysis of the Cl-influence is studied. It concluds that the regression equation is αi=-0. 007968Ci+0. 01948 related coefficient r=-0. 9746, which shows that Cl-concentration has highly significant negative correlation with the optical activity of the solution. When NaCl concentration is less than 8. 78%, the influence of Cl- can be neglected in the determination by disc polarimeter whose precision is ±0.05°D; And when NaCl cotitentration is less than 2. 88%, the influence of Cl- can be reglected in the determination by saccharimeter whose precision is ±0. 01°S. The research result suggests that the Cl- influence from hydrochloric acid hydrolysis in two rotatory analysis could be neglected and the operation of adding NaCl in optical activity determination before hydrolysis couldn't be done.
出处
《广西工学院学报》
CAS
1995年第3期80-82,共3页
Journal of Guangxi University of Technology
