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本文研究了以十六烷基三甲基溴化铵（CTMAB）－正戊醇－正庚烷－水组成的阳离子型O／W微乳液为介质，以4－（2－吡啶偶氮）间苯二酚（PAR）为显色剂，用分光光度法直接测定天麻制剂中的微量锌含量，方法灵敏、准确、简便。其增敏效果与相应的胶束体系比较更加明显。
In this paper, a cationic O/W microemulsion consisting of cetyltrimethylammonium bromide (CTMAB)-n-pentanol-n-heptane-water was used as a medium between 4-(2-pyridylazo). Hydroquinone (PAR) is a chromogenic reagent. Spectrophotometry is used to directly determine trace zinc in Tianma preparation. The method is sensitive, accurate and simple. Its sensitizing effect is more obvious than the corresponding micellar system.