HGAAS测定生物样品中镍

采用石墨炉平台直接测定全血、血清、尿样中镍 ,方法简便 ,快速 ,灵敏度高 ,回收率也较理想。

痕量Co2+的液膜富集及石墨炉原子吸收法测定

乳状液液膜技术已在许多领域中广泛运用。在分析化学用于痕量元素的分离与富集,但国内外均很少报道。近几年,我们开展了这项工作。研究表明,液膜技术作为一种痕量元素的分离与富集方法,无论是在选择性、富集效果和操作等方面,都有许多优于萃取法和离子交换法的特点。液膜法弥补了萃取法受平衡限制的不足,同时又不象离子交换法那样,可使原料液稀释。本文以P507和P204为载体,富集了痕量(10～50μg·L-1)Co2+,并且探讨了在分析化学中进行痕量元素富集时液膜行为的规律性,为建立与完善此种新方法提供了初步条件。

等温平台石墨炉原子吸收法测定明胶中的铅

介绍了用水解法消化样品，采用等温平台石墨炉和基体改进技术，快速、准确地直接测定明胶中铅含量的方法。与以前的灰化法前处理样品过程相比，省时间，回收率为９５％～１１０％，相对标准偏差为１０．８％。

Appropriate titanium slag composition during smelting of vanadium titanomagnetite metallized pellets

The suitable titanium slag composition with high titanium content for electric furnace smelting of vanadium titanomagnetite was investigated through thermodynamics and related phase diagram analysis.According to the thermodynamic results,low-melting-point regions and MgTi2O5primary phase area in the phase diagrams,the suggested titanium slag composition for the present vanadium titanomagnetite metallized pellets should consist of50%TiO2,8%-12%MgO and13%Al2O3(mass fraction)with a binary basicity of0.8-1.2.Finally,the verified smelting experiments were conducted and successful separation of the molten iron from the titanium slag is obtained.The obtained vanadium-containing molten iron contains0.681%V and0.267%Ti,and the obtained titanium slag contains52.21%TiO2(mass fraction),in which MgTi2O5is the primary phase.The titanium resource in the final titanium slag production could be used to produce TiO2pigment by acid leaching methods.