Determination of the Natural Dissolved Concentration of Zirconium in Seawater by Adsorptive Stripping Voltammetry

Schneider, Alexandre B.; Nascimento, Paulo Cı́cero do; Bohrer, Denise; Carvalho, Leandro Machado de; Guarda, Ananda; Dias, Daiane; Koschinsky, Andrea

doi:10.1002/elan.201300103

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…In a previous study 29, it has been shown that Zr(IV) could be determined more stably (without peak vanishing) when the electrolyte solution contains oxalic acid and 1,3‐diphenylguanidine mixed with cupferron (COD mixture). In the present study, the COD mixture was investigated to assay V(V) and Zr(IV).…”

Section: Resultsmentioning

confidence: 99%

“…Voltammetric determinations of Zr(IV) as well as V(V) at trace levels are more properly done as complexes of organic compounds 14–28. In a previous paper 29 the adequacy of some of these ligands towards the Zr(IV) determination in natural waters was critically discussed. The ligand COD showed the best results for Zr(IV) determination at trace levels.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3‐Diphenylguanidine

et al. 2015

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1IntroductionTheo cean is ad ynamic system operating in different time scales,g overning important global processes,s uch as ore formation, bioproductivity and climate changes.D ue to their extremely low concentrations in seawater, trace elements are the key to understanding many of thesep rocesses.T race elements and their isotopes have been explored as proxies for the movement of aquatic masses [1]. Thep rimarys ourceso fd issolveda nd particulatet race metals into the oceans are dust, riverinei nput and continental shelf, i.e., theiri nputsare controlled by continental sources, whereas hydrothermal fluxes are significant for some elementss uch as Mn, and according to newer studies,even Fe [2,3].Thet ransition metalso fg roups IV and Vare characterized by as mall ionic radius and high charges (typically, tetravalent and pentavalent), and despite their relative immobility during processes of rock formation,i th as been shown that in geological systems involving water, such as seawater, estuaries,a nd marine sediments,t hey could become mobileu nder certain conditions [4][5][6][7][8][9].Zirconium occurs as an egatively charged species,s uch as Zr (OH) [11].Z irconium is grouped as aH igh-Field Strength Element (HFSE),w ith as ignificant tendency towards hydrolysis.Z irconium is strongly particle-reactive and is rapidly depleted from solution by interaction with the surface of sinking particles.T his behaviorl eads to al ow truly dissolved concentration of this element in natural waters and as ignificant effect of particles and colloids in its dissolved concentrations [1,4,5,12]. In contrast to HFSEs, whichtypically have only one oxidation state,v anadiumc an present variable oxidation states,V (IV) and V(V). Different redoxs pecies show different affinitiest owards particles and ligands in solution, leading to variations with respect to their biodisponibility and biogeochemistry reactivity.H ence,r edox conditions represent am ajor control over the distribution of these redox-sensitive trace elements. ForV ,o nly the oxidation state + 5i ss table in oxic waters at an eutral pH [13].T he vanadatea nion species, whicha re completely hydrolyzed, such as HVO 4 2À,H 2VO 4 À and the complexN aHVO 4 À , are predominant [ 13].Voltammetric determinations of Zr(IV) as well as V(V) at trace levels are more properly done as complexes of organic compounds [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28].I nap revious paper [29] the adequacy of some of theseligands towards the Zr(IV) determination in natural waters was critically discussed. Thel igand COD showedt he best results for Zr(IV) determination at trace levels.I nt he presents tudy,w ed escribe the sequential determination of Zr(IV) and V(V) in natural waters using adsorptive voltammetric methods based on the accumulation of Zr(IV) and V(V) as cupferron-oxalic acid-1,3-diphenylguanidine (COD) complexes at the HMDE surface.N om ethodu sing the ligandC OD as complexing agent for V(V) was published yet neither individually nor in combinationw ith Zr(IV).Ther...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3‐Diphenylguanidine

et al. 2015

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“…Various analytical techniques used for the determination of zirconium in different matrices include spectrophotometry [6], fluorescence spectrophotometry [7], atomic absorption spectrometry [8], inductively coupled plasma atomic emission spectrometry [9], inductively coupled plasma mass spectrometry [10], isotope dilution mass spectrometry [11], X-ray fluorescence [12], neutron activation analysis [13], proton activation analysis [14], potentiometry [15], kinetic potentiometry [16], polarography [17], stripping voltammetry [18,19], impedimetry [20], and liquid chromatography [21].…”

Section: Introductionmentioning

confidence: 99%

Flame atomic absorption determination of zirconium in glass and refractory bricks after coprecipitation with aluminium hydroxide

Shokrollahi

Gohari

2017

Journal of Taibah University for Science

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A simple preconcentration method for zirconium based on coprecipitation with aluminium hydroxide prior to flame atomic absorption (FAAS) determination was established. The recovery values of the analyte ions were higher than 95%. Such parameters as the type of hydroxide ion source for precipitation, type of acid for the dissolution step, amount of Al 3+ ion as the collector, pH, temperature, standing time and centrifuge time were optimized using 50 mL of a solution containing 150 g of zirconium. The effect of the solution volume and influences of matrix ions on the extraction of the analyte were also examined. Under the optimum conditions, the calibration curve was linear up to 10 mg L −1. The relative standard deviation for solutions containing 150 g of zirconium was found to be 3.9%. The limit of detection (LOD) and limit of quantitation (LOQ) were calculated as 0.17 and 0.57 mg L −1 , respectively. The method is capable of extracting the analyte in different samples with volumes of up to 250 mL. The preconcentration factor for 250 mL and enhancement factor for 50 mL of analyte solution were calculated to be 250 and 40, respectively. The proposed method was successfully applied for the determination of zirconium in glass and refractory brick samples.

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An experimental study on the mixing behavior of Ti, Zr, V and Mo in the Elbe, Rhine and Weser estuaries

Schneider

Koschinsky

Kiprotich

et al. 2016

Estuarine, Coastal and Shelf Science

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Determination of the Natural Dissolved Concentration of Zirconium in Seawater by Adsorptive Stripping Voltammetry

Cited by 6 publications

References 29 publications

Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3‐Diphenylguanidine

Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3‐Diphenylguanidine

Flame atomic absorption determination of zirconium in glass and refractory bricks after coprecipitation with aluminium hydroxide

An experimental study on the mixing behavior of Ti, Zr, V and Mo in the Elbe, Rhine and Weser estuaries

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