【摘要】 基于单宁酸对过氧化氢和高碘酸钾溶液在温温-40存在下化学发光反应的增敏作用,结合流动注射技术,建立测定痕量单宁酸化学发光的方法,测定单宁酸的线性范围为5.0×10^-8～1.0×10^-5mol·L^-1;检出限为2.3×10^-8mol·L^-1;对于5.0×10^-6mol·L^-1单宁酸进行11次平行测定,其相对标准偏差为2.6%。对化学发光反应的机理也作了初步探讨。更多还原

【Abstract】 Based on the enhancing effect of tannic acid on the intensity of chemiluminescence（CL）produced by the reaction of H₂O₂ and KIO₄ in the prescence of Tween 40,and by applying the flow injection technique,a new FI-CL method for determination of tannic acid in Shisandra Chinensis was proposed.Linear relationship between values of increase in CL intensity（△I）and concentration of tannic acid was obtained in the range of 5.0×10^-8- 1.0×10^-5mol·L^-1,with its detection limit of 2.3×10^-8mol·L^-1.Precision of the method was tested at the concentration level of 5.0×10^-6mol·L^-1of tannic acid for 11 determinations,the value of RSD’s（n=11）obtained was 2.6%.A preliminary discussion on the mechanism of the chemiluminescence reaction was given.更多还原