Selective spectrophotometric determination of trace amounts of chromium(VI) using a flow injection system with a microcolumn of zirconium(IV) oxide modified silica gel
Selective spectrophotometric determination of trace amounts of chromium(VI) using a flow injection system with a microcolumn of zirconium(IV) oxide modified silica gel
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使用带有氧化锆 (IV) 改性硅胶微柱的流动注射系统选择性分光光度法测定痕量铬 (VI)
DOI：
10.1039/an9921701029
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
N. Baccan
中科院分区：
文献类型：
--
作者：
C. R. Peixoto;Y. Gushikem;N. Baccan
发现在硅胶表面涂覆的二氧化锆（IV）在pH约为3时对从水溶液中萃取六价铬非常有效。将填充有这种材料的微型柱插入流动注射系统中，用于六价铬的分离和预富集。通过该过程，检测到浓度水平为2 ppb，相对标准偏差为2.4%。由于固定化底物的高选择性，在存在大量其他离子的情况下测定六价铬是可能的。还对添加了六价铬的天然水进行了分析，并与标准方法进行了比较。
Zirconium(IV) oxide coated on a silica gel surface was found to be very effective for extracting CrVI from aqueous solutions at a pH of about 3. A microcolumn packed with this material was inserted into a flow injection system for the separation and preconcentration of CrVI. By this process, a concentration level of 2 ppb was detected with a relative standard deviation of 2.4%. Because of the high selectivity of the immobilized substrate, it was possible to determine CrVI in the presence of larger amounts of other ions. The analysis was also carried out on natural water spiked with CrVI, and compared with a standard method.