催化反应热诱导激光光偏转法测定铁

Determination of Iron by Laser Beam Deflection Induced by Catalytic Reaction Heat

报道催化反应热诱导激光光偏转分析法研究，将其应用于铁催化过氧化氢氧化二苯胺磺酸钠反应体系。探讨了催化反应的最佳条件及共存离子的影响。在铁浓度为９５×１０－４～９５×１０－６ｍｏｌ／Ｌ之间得到了良好线性关系。进行了赤铁矿中总铁量的测定，结果满意。

An analytical method based on the reaction heat_induced laser beam deflection is presented.In an acidic medium,iron catalyzes the oxidation of sodium diphenylamine_4_sulfonate by hydrogen peroxide.The optimal reaction conditions were found with the method of orthogonal experimental design.The effects of co_existing ions were discussed.A good linear relationship exists in the range of 9 5×10 -6 ～ 9 5×10 -4 mol·L -1 of iron.The method has been applied satisfactorily to the determination of iron in hematite.