江汉大学学报:自然科学版
江漢大學學報:自然科學版
강한대학학보:자연과학판
Journal of Jianghan University:Natural Sciences
2012年
1期
65-67
,共3页
铜(Ⅱ)%有机溶剂%CTMAB%增敏%分光光度法
銅(Ⅱ)%有機溶劑%CTMAB%增敏%分光光度法
동(Ⅱ)%유궤용제%CTMAB%증민%분광광도법
copper(Ⅱ)%organic solvent%CTMAB%sensitized%spectrophotometry
呈酸性并溶有乙醇的介质中,铜(Ⅱ)、PAN和十六烷基三甲基溴化铵(CTMAB)形成稳定的多元胶束络合物,其最大吸收波长为520 nm。铜(Ⅱ)浓度在2.0~60.0μg/L范围内符合比尔定律,回归方程为y=0.0059x+0.0048,相关系数r=0.9982,其摩尔吸光系数ε=2.0×104L/mol.cm。相对标准偏差(RSD)小于2.50%。用此法测定食品中微量铜,所得结果与火焰原子吸收分光光度法相符。
呈痠性併溶有乙醇的介質中,銅(Ⅱ)、PAN和十六烷基三甲基溴化銨(CTMAB)形成穩定的多元膠束絡閤物,其最大吸收波長為520 nm。銅(Ⅱ)濃度在2.0~60.0μg/L範圍內符閤比爾定律,迴歸方程為y=0.0059x+0.0048,相關繫數r=0.9982,其摩爾吸光繫數ε=2.0×104L/mol.cm。相對標準偏差(RSD)小于2.50%。用此法測定食品中微量銅,所得結果與火燄原子吸收分光光度法相符。
정산성병용유을순적개질중,동(Ⅱ)、PAN화십륙완기삼갑기추화안(CTMAB)형성은정적다원효속락합물,기최대흡수파장위520 nm。동(Ⅱ)농도재2.0~60.0μg/L범위내부합비이정률,회귀방정위y=0.0059x+0.0048,상관계수r=0.9982,기마이흡광계수ε=2.0×104L/mol.cm。상대표준편차(RSD)소우2.50%。용차법측정식품중미량동,소득결과여화염원자흡수분광광도법상부。
In acid medium with ethanol,copper(Ⅱ)、 PAN and cetyl trimethyl ammonium bromide(CTMAB) could form a stable multi-micelle complex with the maximum absorption wave length at 520 nm.Lambert-Beer law was well obeyed for the copper(Ⅱ) concentration in ranging of 2.0~60.0 μg/L.Regression equation was y=0.0059x+0.0048,which with correlation coefficient r=0.9982 and the apparent molar absorptivity ε=2.0×104 L/mol/cm.The relative standard deviation was less than 2.50%.The proposed method was used in the determination of trace copper in food,and the results were in consistent with the results obtained by flame atomic absorption spectrometry.