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Flow-injection on-line sorption preconcentration in a knotted reactor for electrothermal atomic absorption spectrometric determination of ultratrace amounts of cobalt in natural waters

✍ Scribed by Xiu-Ping Yan; Willy Van Mol; Freddy Adams

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 179 KB
Volume: 9
Category: Article
ISSN: 0895-7533
DOI: 10.1002/(sici)1098-2728(1997)9:4<191::aid-lra5>3.0.co;2-w

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✦ Synopsis

ment factor of 47 in comparison with direct injection of 45 lL aqueous solution was obtained at a sampling frequency of 31 h ‫1מ‬ . The detection limit (3 r) was found to be 2.8 ng L ‫1מ‬ . The precision was 3% relative standard deviation (RSD) at the 0.2 lg L ‫1מ‬ level (n ‫ס‬ 11). The results obtained by the proposed method for a number of water standard reference materials are in good agreement with the certified values.

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Robotic sample pretreatment coupled with flow-injection on-line sorption preconcentration—Electrothermal atomic absorption spectrometry for the determination of copper in environmental and biological materials

✍ Alfredo Velasco-Arjona; María Dolores Luque de Castro; Elissaveta Ivanova; Fredd 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 172 KB 👁 2 views

An automated robotic method for sample pretreatment was developed for copper determination in environmental and biological materials at the low microgram per gram level. The robotic station performing the preliminary operations as weighing of sample and acid digestion was coupled with the flowinject