【摘要】 在酸性介质中ｋ（Ⅲ）能阻抑Ｍｎ（Ⅱ）存在下，二安替比林一（３，４一亚甲二氧基）苯基甲烷（ＤＡＤＭＰＭ）和Ｃｒ（Ⅵ）的显色反应，且含Ｆｅ（Ⅲ）量与ｌｇＡ０／Ａ（Ａ０、Ａ分别为催化反应与阻抑催化反应的吸光度）在０～７μｇ／２５ｍｌ范围内呈良好的线性．文章研究了反应的最适宜条件和动力学参数，建立了一种新的测定痕量Ｆｅ（Ⅲ）的催化动力学光度分析法．更多还原

【Abstract】 in acidic medium the Iron(III) inhibits the colour reaction of Chromium(VI) with diantipyryl ( 3, 4 - dioxomethenyl)- phenylmethane(DADMPM) in the presence of Mn(II); moreover, a good linear relationship has been found between the iron(ill) concentration and log(A, /A) in 0 ~ 7μg /25 ml range of concentration (A, is theabsorbance of catalytic reaction and A is the absorbance of inhibitory reaction). Thebest experimental condtions have been established, and the kinetic parameters have beencalculated. A new negative - catalytic spectrophotometry determining trace iron(III) hasbeen established.更多还原