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研究了在微乳液介质中，锌与１－（２－吡啶偶氮）－２－萘酚（ＰＡＮ）的显色反应，选择５５５ｎｍ处为测定波长，ε为４．５×１０４Ｌｍｏｌ－１ｃｍ－１，锌量在０～１．５２ｍｇ／Ｌ范围内符合朗伯－比耳定律，该法用于固体样品硬脂酸锌含量的直接测定
The color reaction of zinc with 1- (2-pyridylazo) -2-naphthol (PAN) was studied in a microemulsion medium with a wavelength of 555 nm and a ε of 4.5 × 10 4 mol -1 cm -1 , Zinc content in the range of 0 ~ 1.52mg / L in line with Lambert - Beer’s law, the method for the direct determination of solid samples of zinc stearate