现代科学仪器2024，Vol.41Issue(2)：22-24,3.
自动凯氏定氮—电位滴定仪联合检测中药材中的二氧化硫
Rapid Determination of Sulfur Dioxide in Chinese Medicinal Materials by Automatic Kjeldahl Nitrogen Determination Potentiometric Titration
摘要
Abstract
The samples of Chinese medicinal materials were pretreated before distillation with an automatic Kjeldahl nitrogen determinator,and the sulfur dioxide content in the samples was titrated with a potentiometric titrator.Compared with the first method of 2331,Part IV of the Pharmacopoeia of the People's Republic of China(2020),the determination results showed no significant difference(P>0.05).The conditions such as the distillation time and the amount of water added for the rapid detection of sulfur dioxide in Chinese herbal medicine samples with Kjeldahl nitrogen determination instrument were determined through experiments.This method is simple,the experimental process only takes 8 to 10 minutes,the relative standard deviation is less than 1.01%,and the recovery rate of spiking is 95.3 to 101.8%.It is suitable for the detection of large quantities of Chinese herbal medicine samples.关键词
二氧化硫/全自动凯氏定氮仪/自动电位滴定仪/快速检测Key words
Sulfurdioxide/Fullautomatic Kjeldahl nitrogen analyzer/Automatic potentiometric titrator/Quick detection引用本文复制引用
毕程程,孙佳,张恩旭,孙玉,赵庆松,罗雁非..自动凯氏定氮—电位滴定仪联合检测中药材中的二氧化硫[J].现代科学仪器,2024,41(2):22-24,3.基金项目
海南省重点研发计划项目ZDYF2021SHFZ069 （）
