Spectrophotometric and atomic absorption determination of Ni(II) in fresh and sea waters after preconcentration by flotation

Kabil, M. A.; Ghazy, S. E.; Shallaby, M.; Lasheen, Mohamed R.; Amar, N. S.

doi:10.1007/s0021663540371

Cited by 9 publications

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“…Therefore, the determination methods of trace nickel in water (1 pg/1 < level) need to be established. For the determination of ultra-trace nickel in water, electrothermal atomic absorption spectrometry (ETAAS) with graphite atomizers (GF) has been combined with Mg(NO3)2 modifier [5], polyorgs YIIM sorbent [6], zirconium hydroxide co-precipitation [7], quinolin-8-ol immobilized adsorbent (I-8-HOQ column) [8,9], 6-methyl-2-pyridinecarboxyaldehyde-4-phenylsemicarbazone liquidliquid extraction [10], and sodium diethyldithiocarbonate/oleic acid flotation methods [11]. With inductively coupled plasma emission spectrometry (ICP), iminodiacetic acid ethylcellulose (IDAEC) ionexchanger [12], active-carbon fiber [13] and 8-hydroxyquinolin-Ni/XAD-2 resin methods [14] have been reported for Ni determination.…”

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Determination of nickel in water by electrothermal atomic absorption spectrometry with preconcentration on a tungsten foil

et al. 1998

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Abstract.A preconcentration method for nickel in waters involving adsorption on tungsten foil, followed by electrothermal atomic absorption spectrometry (ETAAS) with a tungsten tube atomizer is described. The most suitable pH for nickel adsorption was 5 and the optimum immersion time was 2 rain. Severe interferences from co-existing elements (A1, Ca, Cu, Fe, K, Mg, Na, Pb and Zn) on the Ni AA signal were observed. Under optimal conditions, the preconcentration of nickel on W foil could eliminate interferences from these elements. The detection limit of nickel by preconcentration-ETAAS was 0.1 ng/ml (3S/N). The method with preconcentration on tungsten foil was applied to the determination of nickel in river water. The recovery of spiked nickel was 93-102%. The tungsten foil preconcentration method is sensitive, simple, and convenient. This adsorption method can be utilized in in situ-sampling of ultra-trace nickel in environmental samples (water). Furthermore, after sampling it is easy to carry and store the W-foil without contamination for long time.Key words: preconcentration, adsorption on tungsten foil, nickel, electrothermal atomic absorption spectrometry, water.Nickel, even in small concentrations, has severe shortand long-term effects on the health of individuals, e.g. carcinogenic and atopic dermatitis [1,2]. Trace nickel is present from natural sources as well as from contaminated water arising from manufactures. Many countries have established quality standards of drinking-water, for example 0.05 gg/ml for nickel in France * To whom correspondence should be addressed Tab'yankina [15] presented the determination of trace nickel by DC arc atomic emission spectrometry (AES) with 2-mercaptobenzthiazole/polyacrylonitrile fiber sorbent. Carboxymethyl cellulose 8-hydroxy-s-sulfo-7-quinolyl ester (oxine CM-cellulose) [16] and ICP-MS with I-8-HOQ column [17] have been used for Ni determination by ICP-mass spectrometry (MS). Most of these methods are, however, complicated and time-consuming. Adsorption on tungsten metal is a simple, conventional, low cost, and time saving preconcentration method. Wolff et al. [18] reported the preconcentration of Cd, Cu, Pb, Ag and Zn in water at the ng/1 level by adsorption onto tungsten wire. Hoshino et al. [19] and Newton et al. [20] described GFAAS with tungsten wire preconcentration for Ag, Cd, Co, Cr,

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Determination of nickel in water by electrothermal atomic absorption spectrometry with preconcentration on a tungsten foil

et al. 1998

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“…Τα ανόργανα άλατα του κοβαλτίου είναι μέτριας τοξικότητας για τα ζώα και τον άνθρωπο Συμπτώματα χρόνιας δηλητηρίασης από κοβάλτιο έχουν εμφανιστεί σε αναιμικούς που υπόκεινται σε θεραπεία με σιδηρούχα σκευάσματα, επειδή το κοβάλτιο προστίθεται σ' αυτά για την απορρόφηση του σιδήρου [95] Σε παλαιότερες εποχές είχαν παρατηρηθεί δηλητηριάσεις και από μπύρες που περιείχαν θεϊκό κοβάλτιο lmg/1 ως σταθεροποιητικό του αφρού Ακόμη, οι εργαζόμενοι που εκτίθενται για μεγάλα χρονικά διαστήματα στο κοβάλτιο εμφανίζουν πνευμονική ίνωση και άλλες πνευμονικές διαταραχές [96,97] Το μεταλλικό κοβάλτιο δεν είναι τερατογόνο για τον άνθρωπο, όπως απέδειξε μελέτη εγκύων γυναικών που έκαναν θεραπεία αναιμίας [98] 5 6 Εκτίμηση του κινδύνου και επιτρεπτά όρια συγκέντρωσης Από όσα προαναφέρθηκαν, γίνεται αντιληπτό ότι απαιτούνται μέτρα προφύλαξης και διεξοδικές μετρήσεις ώστε οι άνθρωποι και τα ζώα να προστατεύονται από την έκθεση στο κοβάλτιο και τις ενώσεις του Στην Γερμανία υποδεικνύεται μια ανώτατη τιμή 0,5 mg/m 3 για την ατμόσφαιρα των επαγγελματικών χωρών Στις Η Π Α το όριο είναι 0,1 mg/m 3 , ενώ το 1982 έγινε πρόταση να κατέβει πιο χαμηλά στα 0,05mg/m 3 Στην πρώην Σοβιετική Ενωση το όριο ήταν 0,05 mg/m για το κοβάλτιο και το οξείδιο του Στην ίδια χωρά το όριο για το οκτακαρβονυλοδικοβάλτιο και το υδριδοκαρβονυλοκοβάλτιο είχε καθοριστεί σε 0,01 mg/m 3 Στο Βέλγιο η ανώτατη τιμή καθορίστηκε ήδη σε 0,01 mg/m 3 για το κοβάλτιο και το οξείδιο του Για το πόσιμο νερό δεν έχουν καθοριστεί ανεκτά όρια συγκέντρωσης στις περισσότερες χώρες του κόσμου Μόνο στην πρώην Σοβιετική Ενωση υπήρχε όριο 1 mg/1, όριο μάλλον μεγάλο αφού σε ποντικούς εμφανίζονται τοξικά αποτελέσματα από νερό που περιέχει 2 mg/1 κοβαλτίου Στα ψάρια τα όρια ανοχής κυμαίνονται μεταξύ 0,01 και 0,1 mg/1 [108,109,113,114] και τρόφιμα [105,106,116,117,119] Το 1960 ο Alan [121] ανέφερε για πρώτη φορά τη χρήση της ατομικής απορρόφησης με φλόγα ως σύστημα ατομοποίησης (AAS) στον προσδιορισμό ιόντων νικελίου σε υδατικά διαλύματα Σύντομα δημοσιεύτηκαν και άλλες εφαρμογές προσδιορισμού του νικελίου [101,104,122] και του κοβαλτίου [101] σε φυσικά νερά, του νικελίου [116] και του κοβαλτίου [105] σε τρόφιμα και νικελίου [123][124][125][126][12...…”

Section: στα γώα και τους ανθρώπουunclassified

Αναπτυξη Ταυτοχρονου Βολταμετρικου Προσδιορισμου Βαρεων Μεταλλων Με Ηλεκτροδια Κρεμαστης Σταγονας Υδραργυρου Και Χημικα Μορφοποιημενο Παστας Ανθρακα

Ηλιαδου¹

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Heavy Metals Analysis in Seawater and Brines

Troccoli

2000

Encyclopedia of Analytical Chemistry

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There has been growing concern during and since the 1990s about the effect that the toxicity and persistence of heavy metals will have on the biosphere. Consequently, these new environmental pressures have challenged analysts to find better experimental procedures for handling, recognition and evaluation of traces of heavy metals. Moreover, the determination of low levels of heavy metals in seawater has received particular attention as a way of assessing the early impact of human activities on the marine environment. It is necessary to protect the marine and continental waters against contamination so as to allow suitable conditions for the maintenance of aquatic life and the various uses derived from aquatic life. It is not the metal concentration alone that enables an environmental diagnosis to be made but the way metal combines with other elements to form species. These species are responsible for the biological behavior of the heavy metal under consideration, as its bioavailability will determine the amount of harm it may cause. Thus, “speciation” studies should be conducted to assess the potential environmental impact of human activities. From the analytical point of view, seawater and brines may be considered to be closely related systems in terms of matrix effects and analytical difficulties. Hence these two systems will be included in this article although the aims of heavy metal detection and determination might be diverse in each case. Analytical inaccuracies that arise from the high salt content of the seawater or brine solutions are exacerbated by the low levels of trace metals, which require careful control of contamination during sample collection and analysis and very sensitive analytical techniques. Different techniques for the determination of trace metals in seawater, such as spectroscopic and electroanalytical methods, will be discussed here in terms of their performance in dealing with the problem of trace metal detection and determination. Even the term “trace” has had different meanings over the years, normally being associated with the detection limit of the technique employed (“traces”, “footprints” or “trails” have a lot to do with the way they are observed). Amounts that would have been considered traces in the 1960s are probably no longer considered as such in the 1990s, as detection limits for most heavy metals have been lowered by three to six orders of magnitude (using “state of the art” techniques) since the late 1960s. Special attention has been paid to the preconcentration of the analyte and its isolation from the matrix constituents which might obscure its accurate determination. A variety of separation–preconcentration methods will be presented, with a strong bias towards those procedures leading to some kind of automation, because pretreatment of the samples is often time‐consuming and prone to contamination and may lead to an incomplete recovery of the analytes. Flow injection analysis (FIA) has appeared as a solution to time‐consuming and complicated separations and it will also be discussed in relation to alternative forms of analysis, especially in terms of its ability to perform speciation studies.

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Spectrophotometric and atomic absorption determination of Ni(II) in fresh and sea waters after preconcentration by flotation

Cited by 9 publications

References 11 publications

Determination of nickel in water by electrothermal atomic absorption spectrometry with preconcentration on a tungsten foil

Determination of nickel in water by electrothermal atomic absorption spectrometry with preconcentration on a tungsten foil

Αναπτυξη Ταυτοχρονου Βολταμετρικου Προσδιορισμου Βαρεων Μεταλλων Με Ηλεκτροδια Κρεμαστης Σταγονας Υδραργυρου Και Χημικα Μορφοποιημενο Παστας Ανθρακα

Heavy Metals Analysis in Seawater and Brines

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