摘要
研究了微乳液介质中,在pH=9.0的NH4Cl-NH3缓冲溶液时,镍(II)与1-(2-吡啶偶氮)-2-萘酚(PAN)显色生成稳定的紫红色配合物,在580 nm处摩尔吸光系数为ε=6.09×104 L.mol-1.cm-1,镍(II)含量在0.1～0.7μg/mL范围内符合比耳定律,方法捡出限为0.0012μg/mL,可用于芹菜中镍(II)的测定。
The color reaction of nickel （Ⅱ） with 1-（2-pyridylazo）-2-naphthol（PAN） in micro emulsion has been studied, nickel （Ⅱ） reacts with PAN to form a stable purple complex at pH= 9.0. Its apparent molar absorptivity is 6.09×10^4 L·mol^-1·cm^-1 at 580 nm. Beer＇s law is obeyed in the range of 0.1～0.7μg/mL for nickel （Ⅱ）. The method is used to determine nickel （Ⅱ） in celery samples with satisfactory results.
出处
《广东化工》
CAS
2006年第10期110-111,共2页
Guangdong Chemical Industry
关键词
镍
芹菜
微乳液
分光光度法
nickel
celery
micro emulsion
spectrophotometry
