摘要
合成了试剂α-（4-氨基安替比林偶氮）-β-萘酚（AAP-NP）,研究了试剂的光度性质.实验表明,pH在1.5～3.0范围内,铁（Ⅲ）与AAP-NP形成1：2配合物,其最大吸收波长为300 nm,表观摩尔吸光系数ε=6.72×10^-4L·mol^-1·cm^-1,铁含量在0～11/25μg/mL范围内与吸光度呈良好的线性关系,线性回归系数r=0.9999,方法检出限为1.6 ng/mL.将该方法用于茶叶、木耳、缸豆和水中微量铁（Ⅲ）的测定,结果满意.
In this paper, a new reagent, α -[ （4-aminoantipyrine） azo]-β-naphthyl hydroxide （AAP-NP）, was synthesized and used as analytical reagent for the determination of iron（ Ⅲ ）. The optimal conditions for complex formation of AAP-NP with iron（ Ⅲ ） were established. A 2：1 type complex was formed in the pH range of 1.5 to 3.0. The calibration curve of Fe^3＋ with good linearity（ r = 0.999 9） was obtained over the range of 0- 11/25 μg/mL. The detection limit was 1.6 ng/mL. The method was applied to determine iron（ Ⅲ ） in tea, water et al. with satisfactory results.
出处
《江西师范大学学报（自然科学版）》
CAS
北大核心
2006年第2期148-150,共3页
Journal of Jiangxi Normal University(Natural Science Edition)
基金
江苏省高校自然科学研究计划资助项目(04KJD0015)
