Flow-injection preconcentration of Co(II) on 1-nitroso-2-naphthol-3,6-disulphonate-modified alumina for flame atomic absorption spectrometry

✍ Scribed by Marek Trojanowicz; Krystyna Pyrzyńska

• Book ID: 102982267
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 533 KB
• Volume: 287
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)e0597-z

✦ Synopsis

The possibility of using alumina loaded with I-nitroso-2-naphthoL3,6_disulphonate for the on-line preconcentration of cobalt(B) was investigated. The relatively high capacities of this simply and reproducibly prepared material and the absence of swelling complications allow for its effective use in a flow-injection analysis-atomic absorption spectrometric system. In the time-based system with a 20-min preconcentration time a detection limit of 0.44 pg 1-l was obtained with a precision of 2.3% (R.S.D.) at the 10 pg 1-l level. A 97% recovery was obtained for artificial ocean water spiked with 1 pg 1-l of Co(B). The method was applied to the determination of cobalt in oriental tobacco leaves certified standard material.