Using thymol-sodium hypobromite as chromogenic reagent, and extracting the colour formed with butanol, a spectrophotometric method for the determination of arginine in fermentation broth was studied.
以百里酚的次溴酸钠溶液为显色剂，用正丁醇萃取显色产物，以分光光度计比色测定有机相的吸光度值。
A new method for the spectrophotometric determination of trace copper with 2,4 dihydroxybenzaldehyde thiosemicarbazone(DBT) is reported in this paper.
研究了新显色剂2 ，4 二羟基苯甲醛缩氨基硫脲（DBT ）与铜的显色反应，建立了光度法测定微量铜的新方法。
Objective: to optimize the water extracting technology for Pingzhi capsule and establish a ultraviolet spectrophotometric method for the determination of total anthraquinones in Pingzhi capsule.
目的：优选平脂胶囊最佳水提工艺，建立其总蒽醌含量的紫外分光光度测定方法。
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