Generation of atomic and molecular cadmium species from aqueous media.
Generation of atomic and molecular cadmium species from aqueous media.
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DOI：
10.1021/ac020529
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发表时间：
2003-01
影响因子：
7.4
通讯作者：
Yong-Lai Feng;R. Sturgeon;J. Lam
中科院分区：
文献类型：
--
作者：
Yong-Lai Feng;R. Sturgeon;J. Lam
用改进的平行光路Burgener雾化器，用四氢硼钠还原剂与酸化样品反应，生成镉的原子和分子形态。一旦生成，原子物种在水中是稳定的，具有2.2分钟的半衰期，并且可以预浓缩用于随后的定量。虽然还原反应的初始产物似乎是自由原子，但随后与新生氢的相互作用在由暴露于反应产物的表面基团的化学性质调节的转化中产生分子氢化物。使用玻璃喷雾室导致原子蒸气占优势，而聚合物喷雾室释放挥发性分子物质。
Generation of atomic and molecular species of cadmium following reaction of acidified sample with sodium tetrahydroborate reductant using a modified parallel path Burgener nebulizer has been accomplished. Once generated, atomic species are stable in water, having a half-life of 2.2 min, and can be preconcentrated for subsequent quantitation. Although the initial products of the reduction reaction appear to be free atoms, subsequent interaction with nascent hydrogen gives rise to the molecular hydride in a transformation moderated by the chemistry of surface groups exposed to the reaction products. Use of a glass spray chamber results in a predominance of atomic vapor whereas a polymeric spray chamber releases the volatile molecular species.