摘要
在Tris-HCl缓冲溶液(pH为5.5)中,以溴甲酚绿(BCG)为显色剂,Hg(Ⅱ)-BCG在水相中形成稳定的黄色配合物,该配合物在446nm处有一最大吸收波长,摩尔吸光系数为3.12×105L/moL·cm,Hg(Ⅱ)含量在0.0～100μg/mL范围服从朗伯比尔定律,检出限0.57μg/mL,加标回收率97.0%～101.0%,RSD为0.15%～0.31%。该法简便易行,可直接应用于白酒中微量汞的测定。
In Tris （3-hydroxy-methane） - HCI buffer （pH 5.5）, with bromocresol green （BCG） as developer, Hg （129 - BCG in the aqueous phase to form stable yellow complex, the complex has a maximum absorption wavelength in 445 nm, the molor absorptivity of the complex is 3.12×10^5 L/moL.cm, Beer＇s law is obeyed for mercury in the rang of 0.0-100.0 μg/mL, the detection limit 0.57 μg/mL, the recoveries were 97.0 %-101.0 %. RSD were 0.15 %-0.31%. The method could be applied directly to determine trace mercury in liquor because it is simple to operate.
出处
《酿酒科技》
北大核心
2007年第3期105-106,109,共3页
Liquor-Making Science & Technology
关键词
分析检测
溴甲酚绿
分光光度法
白酒
微量汞
analysis and determination
bromocresol green
spectrophotometric method
liquor
trace mercury
