摘要
通过标记硫酸铵的对天然硫酸铵的交叉污染,研究K氏定氮仪冷凝器对NH3的吸附解吸附规律,并比较了不同表面积冷凝器的吸附解吸附规律。结果表明:K氏定氮仪对NH3的吸附量主要取决于冷凝器的表面积,表面积愈大吸附量愈高;吸附于冷凝器表面NH3的解吸附量和解吸附率随蒸馏次数的增加而逐渐减少,其中第1次的解吸率最高,为36.88%～37.91%。
The objective of this study paper was to investigate adsorption and desorption of NH3 in condenser of distillation unti by cross-contamination between labeled ammonia sulphate and natural ammonia sulphate,and compare effect of surface area of condenser on the adsorption and desorption of NH3.Results showed that the adsorped amount of NH3 on the condenser mainly depended on increasing of its surface area and the desorption amount and ratio of NH3 from condenser decreased as distillating times increased,the top desorption rate was 36.88%-37.91% at first distillation.
出处
《核农学报》
CAS
CSCD
北大核心
2013年第1期99-107,共9页
Journal of Nuclear Agricultural Sciences
基金
河北省农林科学院"高层次人才创新工程"基金(2011055001)
关键词
K氏定氮
交叉污染
吸附
解吸附
Kjeldahl method
Cross-contamination
Absorption
Desorption
