摘要
在HAc-NaAc缓冲溶液(pH值为6.0)条件下,溴酚蓝对Fe2+与邻二氮菲的显色反应具有增敏作用,形成的络合物在三氯甲烷中的最大吸收波长为604nm,表观摩尔吸收系数为ε604=1.64×104L.(mol.cm)-1,灵敏度提高了49%。Fe2+浓度在0～2.0mg.L-1范围内符合比尔定律,检出限为0.015 mg.L-1,用于自来水中铁含量检测能够得到满意结果。
The bromophenol blue has sensibilization to chromogenic reaction of Fe2＋ and phenantheroline in HAc-NaAc buffer solution（pH value is 6.0）.The maximum absorption wave length of complex was 604nm in chloroform.The molar absorption coefficient was 1.63×104L·（mol·cm）-1 and the sensitivity increased 48%.Beer＇s law was obeyed for Fe（Ⅱ） in the range of 0~2.0mg·mL-1 and the detection limit wass 0.015mg·L-1.This method can be applied to determine micro Fe in tap water and the results were satisfied.
出处
《化学工程师》
CAS
2011年第1期21-23,共3页
Chemical Engineer
基金
绥化学院科学技术研究资助项目(K1001006)
绥化学院科研创新团队基金资助项目(CX2008002)
关键词
铁
分光光度法
邻二氮菲
溴酚蓝
iron
spetrophotometry
phenanthroline
bromophenol blue
