Research progress on determination of the speciation of dissolved Cu, Pb, Zn and Cd in seawater by stripping voltammetry
ZHANG Cui-qin1, LI Li2, YANG Ru-jun1
1. The Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;
2. The First Institute of Oceanography, Qingdao 266061, China
Abstract:The chemical speciation of trace metals in seawater controls their biogeochemical cycling process and their transport and fate in marine environment, and it is closely related with metals' toxicity and bioavailability. Thus, the study of chemical speciation of trace metals draws intensive attention. However, the matrix of seawater is very complex, and the trace metal concentrations are extremely low. The sampling and analytical processes can easily introduce contamination if not careful handled. Thus, the skill required for trace metal speciation studies in seawater is quite high. Good selectivity and extremely low detection limits have made stripping voltammetry (SV) a widely used technique for trace metal speciation in seawater. Internationally, the SV method for speciation analysis in seawater has been modified and updated; while in China, not only in Open Ocean, but also in coastal areas, the studies on trace metal speciation in seawater are scarce. This paper will introduce recent research progresses on speciation studies of several selected metals (Cu, Pb, Zn, Cd), along with the development of analytical methods. We hope it can help promote the understanding and researches of this field in China.
ZHANG Cui-qin,LI Li,YANG Ru-jun. Research progress on determination of the speciation of dissolved Cu, Pb, Zn and Cd in seawater by stripping voltammetry[J]. Marine Environmental Science, 2018, 37(1): 151-160.
BUTLER A.Acquisition and utilization of transition metal ions by marine organisms[J].Science,1998,281(5374):207-209.
[2]
MOREL F M M,PRICE N M.The biogeochemical cycles of trace metals in the oceans[J].Science,2003,300(5621):944-947.
[3]
GOES J I,GOMES H D R,SELPH K E,et al.Biological response of Costa Rica Dome phytoplankton to Light,Silicic acid and Trace metals[J].Journal of Plankton Research,2016,38(2):290-304.
[4]
SANTOMAURO G,SUN W L,BRVMMER F,et al.Incorporation of zinc into the coccoliths of the microalga Emiliania huxleyi[J].BioMetals,2016,29(2):225-234.
[5]
MOFFETT J W,BRAND L E,CROOT P L,et al.Cu speciation and cyanobacterial distribution in harbors subject to anthropogenic Cu inputs[J].Limnology and Oceanography,1997,42(5):789-799.
[6]
STUMM W,MORGAN J J.Aquatic chemistry:chemical equilibria and rates in natural waters[M].New York:John Wiley & Sons,1995.
[7]
ELLWOOD M J,WILSON P,VOPEL K,et al.Trace metal cycling in the Whau estuary,Auckland,New Zealand[J].Environmental Chemistry,2008,5(4):289-298.
[8]
SANDERS B M,JENKINS K D,SUNDA W G,et al.Free cupric ion activity in seawater:effects on metallothionein and growth in crab larvae[J].Science,1983,222(4619):53-55.
[9]
DE JONGE M,LOFTS S,BERVOETS L,et al.Relating metal exposure and chemical speciation to trace metal accumulation in aquatic insects under natural field conditions[J].Science of the Total Environment,2014,496:11-21.
[10]
SUNDA W G,GUILLARD R R L.The relationship between cupric ion activity and the toxicity of copper to phytoplankton[J].Journal of Marine Research,1975,34:51 l-529.
[11]
SINOIR M,ELLWOOD M J,BUTLER E C V,et al.Zinc cycling in the Tasman Sea:Distribution,speciation and relation to phytoplankton community[J].Marine Chemistry,2016,182:25-37.
[12]
VAN DEN BERG C M G.Determination of the complexing capacity and conditional stability constants of complexes of copper (Ⅱ) with natural organic ligands in seawater by cathodic stripping voltammetry of copper-catechol complex ions[J].Marine Chemistry,1984,15(1):1-18.
[13]
BRULAND K W,RUE E L,DONAT J R,et al.Intercomparison of voltammetric techniques to determine the chemical speciation of dissolved copper in a coastal seawater sample[J].Analytica Chimica Acta,2000,405(1/2):99-113.
[14]
MARTIN J H,FITZWATER S E.Iron deficiency limits phytoplankton growth in the north-east pacific subarctic[J].Nature,1988,331(6154):341-343.
[15]
MOORE J K,DONEY S C,KLEYPAS J A,et al.An intermediate complexity marine ecosystem model for the global domain[J].Deep Sea Research Part Ⅱ:Topical Studies in Oceanography,2001,49(1/2/3):403-462.
[16]
RUE E L,BRULAND K W.Complexation of iron (Ⅲ) by natural organic ligands in the Central North Pacific as determined by a new competitive ligand equilibration/adsorptive cathodic stripping voltammetric method[J].Marine Chemistry,1995,50(1/2/3/4):117-138.
[17]
VAN DEN BERG C M G.Evidence for organic complexation of iron in seawater[J].Marine Chemistry,1995,50(1/2/3/4):139-157.
[18]
POWELL R T,DONAT J R.Organic complexation and speciation of iron in the South and Equatorial Atlantic[J].Deep Sea Research Part Ⅱ:Topical Studies in Oceanography,2001,48(13):2877-2893.
[19]
BOYD P W,JICKELLS T,LAW C S,et al.Mesoscale iron enrichment experiments 1993-2005:Synthesis and future directions[J].Science,2007,315(5812):612-617.
[20]
SU H,YANG R J,ZHANG A B,et al.Dissolved iron distribution and organic complexation in the coastal waters of the East China Sea[J].Marine Chemistry,2015,173:208-221.
[21]
BOYE M,ALDRICH A P,VAN DEN BERG C M G,et al.Horizontal gradient of the chemical speciation of iron in surface waters of the Northeast Atlantic Ocean[J].Marine Chemistry,2003,80(2/3):129-143.
[22]
BRAUN V,HANTKE K.Recent insights into iron import by bacteria[J].Current Opinion in Chemical Biology,2011,15(2):328-334.
[23]
HASSLER C S,NORMAN L,NICHOLS C A M,et al.Iron associated with exopolymeric substances is highly bioavailable to oceanic phytoplankton[J].Marine Chemistry,2015,173:136-147.
[24]
BOYD P W,ELLWOOD M J.The biogeochemical cycle of iron in the ocean[J].Nature Geoscience,2010,3(10):675-682.
[25]
SUN M Y,ZHANG H,ZHANG Z B.Study of apparent complexing capacities of trace heavy-metals in the Huanghe River Estuary[J].Acta Oceanologica Sinica,1988,7(1):82-93.
[26]
ZHANG M P,GUO B S,ZHANG Z B,et al.Heavy metal complexation capacity of the South China Sea water[J].Chinese Journal of Oceanology and Limnology,1990,8(2):158-166.
[27]
LI L,LIU J H,WANG X J,et al.Dissolved trace metal distributions and Cu speciation in the southern Bohai Sea,China[J].Marine Chemistry,2015,172:34-45.
[28]
ZHANG R F,ZHANG J,REN J L,et al.X-Vane:A sampling assembly combining a Niskin-X bottle and titanium frame vane for trace metal analysis of sea water[J].Marine Chemistry,2015,177:653-661.
[29]
SOARES H M V M,ALMEIDA A A N,CASTRO M P O,et al.Applicability of potentiometric stripping analysis to the speciation of lead-humic acid complexes using potassium permanganate as oxidant[J].The Analyst,1998,123(6):1377-1382.
[30]
VAN LEEUWEN H P,TOWN R M,Stripping chronopotentiometry at scanned deposition potential(SSCP).:Part 1.Fundamental features[J].Journal of Electroanalytical Chemistry,2002,536(1/2):129-140.
[31]
GALCERAN J,COMPANYS E,PUY J,et al.AGNES:a new electroanalytical technique for measuring free metal ion concentration[J].Journal of Electroanalytical Chemistry,2004,566(1):95-109.
[32]
VAN DEN BERG C M G.Direct determination of sub-nanomolar levels of zinc in sea-water by cathodic stripping voltammetry[J].Talanta,1984,31(12):1069-1073.
[33]
FISCHER E,VAN DEN BERG C M G.Anodic stripping voltammetry of lead and cadmium using a mercury film electrode and thiocyanate[J].Analytica Chimica Acta,1999,385(1/2/3):273-280.
[34]
VAN DEN BERG C M G.Adsorptive cathodic stripping voltammetry of trace elements in sea water[J].The Analyst,1989,114(12):1527-1530.
[35]
ACHTERBERG E P,BRAUNGARDT C.Stripping voltammetry for the determination of trace metal speciation and in-situ measurements of trace metal distributions in marine waters[J].Analytica Chimica Acta,1999,400(1/2/3):381-397.
[36]
KIM J M,BAARS O,MOREL F M M.Bioavailability and electroreactivity of zinc complexed to strong and weak organic ligands[J].Environmental Science and Technology,2015,49(18):10894-10902.
[37]
BRULAND K W.Complexation of zinc by natural organic ligands in the central North Pacific[J].Limnology and Oceanography,1989,34(2):269-285.
[38]
LAM M T,MURIMBOH J,HASSAN N M,et al.Competitive ligand exchange/adsorptive cathodic stripping voltammetry (CLE/AdCSV) for kinetic studies of nickel speciation in aqueous environmental samples containing heterogeneous,macromolecular,organic complexants[J].Analytica Chimica Acta,1999,402(1/2):195-209.
[39]
SAITO M A,MOFFETT J W.Complexation of cobalt by natural organic ligands in the Sargasso sea as determined by a new high-sensitivity electrochemical cobalt speciation method suitable for open ocean work[J].Marine Chemistry,2001,75(1/2):49-68.
[40]
LORENZO J I,NIETO O,BEIRAS R.Effect of humic acids on speciation and toxicity of copper to Paracentrotuslividus larvae in seawater[J].Aquatic Toxicology,2002,58(1/2):27-41.
[41]
MOFFETT J W,DUPONT C.Cu complexation by organic ligands in the sub-arctic NW Pacific and Bering Sea[J].Deep Sea Research Part I:Oceanographic Research Papers,2007,54(4):586-595.
[42]
COALE K H,BRULAND K W.Copper complexation in the Northeast Pacific[J].Limnology and Oceanography,1988,33(5):1084-1101.
[43]
COALE K H,BRULAND K W.Spatial and temporal variability in copper complexation in the North Pacific[J].Deep Sea Research Part A.Oceanographic Research Papers,1990,37(2):317-336.
[44]
DONAT J R,LAO K A,BRULAND K W.Speciation of dissolved copper and nickel in South San Francisco Bay:a multi-method approach[J].Analytica Chimica Acta,1994,284(3):547-571.
[45]
VAN DEN BERG C.Adsorptive cathodic stripping voltammetry and chronopotentiometry of trace metals in sea water[J].Analytical Proceedings,1988,25:265-266.
[46]
VOELKER B M,KOGUT M B.Interpretation of metal speciation data in coastal waters:the effects of humic substances on copper binding as a test case[J].Marine Chemistry,2001,74(4):303-318.
[47]
NUESTER J,VAN DEN BERG C M G.Determination of metal speciation by reverse titrations[J].Analytical Chemistry,2005,77(1):11-19.
[48]
KOGUT M B,VOELKER B M.Strong copper-binding behavior of terrestrial humic substances in seawater[J].Environmental Science and Technology,2001,35(6):1149-1156.
[49]
CAMPOS M L A M,VAN DEN BERG C M G.Determination of copper complexation in sea water by cathodic stripping voltammetry and ligand competition with salicylaldoxime[J].Analytica Chimica Acta,1994,284(3):481-496.
[50]
MILLER L A,BRULAND K W.Competitive equilibration techniques for determining transition metal speciation in natural waters:Evaluation using model data[J].Analytica Chimica Acta,1997,343(3):161-181.
[51]
LAGLERA L M,VAN DEN BERG C M G.Copper complexation by thiol compounds in estuarine waters[J].Marine Chemistry,2003,82(1/2):71-89.
[52]
RU?I? I.Theoretical aspects of the direct titration of natural waters and its information yield for trace metal speciation[J].Analytica Chimica Acta,1982,140(1):99-113.
[53]
PI?ETA I,BRANICA M.Simulation and fitting of anodic stripping voltammetry data for determination of the metal complexing capacity[J].Analytica Chimica Acta,1997,351(1/2/3):73-82.
[54]
PI?ETA I,SANDER S G,HUDSON R J M,et al.Interpretation of complexometric titration data:An intercomparison of methods for estimating models of trace metal complexation by natural organic ligands[J].Marine Chemistry,2015,173:3-24.
[55]
GARNIER C D,PI?ETA I,MOUNIER S,et al.Influence of the type of titration and of data treatment methods on metal complexing parameters determination of single-and multi-ligand systems measured by stripping voltammetry[J].Analytica Chimica Acta,2004,505(2):263-275.
[56]
GERRINGA L J A,RIJKENBERG M JA,THURÓCZY C E,et al.A critical look at the calculation of the binding characteristics and concentration of iron complexing ligands in seawater with suggested improvements[J].Environmental Chemistry,2014,11(2):114-136.
[57]
OMANOVI? D,GARNIER C D,PI?ETA I.ProMCC:An all-in-one tool for trace metal complexation studies[J].Marine Chemistry,2015,173:25-39.
[58]
BRAND L E,SUNDA W G,GUILLARD R R L.Reduction of marine phytoplankton reproduction rates by copper and cadmium[J].Journal of Experimental Marine Biology and Ecology,1986,96(3):225-250.
[59]
MOFFETT J W.Temporal and spatial variability of copper complexation by strong chelators in the Sargasso Sea[J].Deep Sea Research Part I:Oceanographic Research Papers,1995,42(8):1273-1295.
[60]
SANDER S G,BUCK K N,WELLS M.The effect of natural organic ligands on trace metal speciation in San Francisco Bay:Implications for water quality criteria[J].Marine Chemistry,2015,173:269-281.
[61]
OLDHAM V E,SWENSON M M,BUCK K N.Spatial variability of total dissolved copper and copper speciation in the inshore waters of Bermuda[J].Marine Pollution Bulletin,2014,79(1/2):314-320.
[62]
BUCK K N,SELPH K E,BARBEAU K A.Iron-binding ligand production and copper speciation in an incubation experiment of Antarctic Peninsula shelf waters from the Bransfield Strait,Southern Ocean[J].Marine Chemistry,2010,122(1/2/3/4):148-159.
[63]
SEMENIUK D M,BUNDY R M,PAYNE C D,et al.Acquisition of organically complexed copper by marine phytoplankton and bacteria in the northeast subarctic Pacific Ocean[J].Marine Chemistry,2015,173:222-233.
[64]
DONAT J R,VAN DEN BERG C M G.A new cathodic stripping voltammetric method for determining organic copper complexation in seawater[J].Marine Chemistry,1992,38(1/2):69-90.
[65]
KOZELKA P B,BRULAND K W.Chemical speciation of dissolved Cu,Zn,Cd,Pb in Narragansett Bay,Rhode Island[J].Marine Chemistry,1998,60(3/4):267-282.
[66]
MULLER F L L.Interactions of copper,lead and cadmium with the dissolved,colloidal and particulate components of estuarine and coastal waters[J].Marine Chemistry,1996,52(3/4):245-268.
[67]
WELLS M L,KOZELKA P B,BRULAND K W.The complexation of ‘dissolved’ Cu,Zn,Cd and Pb by soluble and colloidal organic matter in Narragansett Bay,RI[J].Marine Chemistry,1998,62(3/4):203-217.
[68]
HELLER M I,CROOT P L.Copper speciation and distribution in the Atlantic sector of the Southern Ocean[J].Marine Chemistry,2015,173:253-268.
[69]
KARAVOLTSOS S,SAKELLARI A,MAKARONA A,et al.Copper complexation in wet precipitation:Impact of different ligand sources[J].Atmospheric Environment,2013,80:13-19.
[70]
KARAVOLTSOS S,KALAMBOKIS E,SAKELLARI A,et al.Organic matter characterization and copper complexing capacity in the sea surface microlayer of coastal areas of the Eastern Mediterranean[J].Marine Chemistry,2015,173:234-243.
[71]
WHITBY H,VAN DEN BERG C M G.Evidence for copper-binding humic substances in seawater[J].Marine Chemistry,2015,173:282-290.
[72]
ABUALHAIJA M M,WHITBY H,VAN DEN BERG C M G.Competition between copper and iron for humic ligands in estuarine waters[J].Marine Chemistry,2015,172:46-56.
[73]
MULLER F L L,JACQUET S,WILSON W H.Biological factors regulating the chemical speciation of Cu,Zn,and Mn under different nutrient regimes in a marine mesocosm experiment[J].Limnology and Oceanography,2003,48(6):2289-2302
[74]
LANDRY C,TREMBLAY L.Compositional differences between size classes of dissolved organic matter from freshwater and seawater revealed by an HPLC-FTIR system[J].Environmental Science and Technology,2012,46(3):1700-1707.
[75]
MULLER F L L,BATCHELLI S.Copper binding by terrestrial versus marine organic ligands in the coastal plume of River Thurso,North Scotland[J].Estuarine,Coastal and Shelf Science,2013,133:137-146.
[76]
AIKEN G R,HSU-KIM H,RYAN J N.Influence of dissolved organic matter on the environmental fate of metals,nanoparticles,and colloids[J].Environmental Science and Technology,2011,45(8):3196-3201.
[77]
BATCHELLI S,MULLER F L L,BAALOUSHA M,et al.Size fractionation and optical properties of colloids in an organic-rich estuary (Thurso,UK)[J].Marine Chemistry,2009,113(3/4):227-237.
[78]
XUE H B,SIGG L.Comparison of the complexation of Cu and Cd by humic or fulvic acids and by ligands observed in lake waters[J].Aquatic Geochemistry,1999,5(4):313-335.
[79]
PLAVŠI? M,GAŠPAROVI? B,STRME? KI S,et al.Copper complexing ligands and organic matter characterization in the northern Adriatic Sea[J].Estuarine,Coastal and Shelf Science,2009,85(2):299-306.
[80]
SARRADIN P M,WAELES M,BERNAGOUT S,et al.Speciation of dissolved copper within an active hydrothermal edifice on the Lucky Strike vent field (MAR,37°N)[J].Science of the Total Environment,2009,407(2):869-878.
[81]
KLEINT C,KUZMANOVSKI S,POWELL Z,et al.Organic Cu-complexation at the shallow marine hydrothermal vent fields off the coast of Milos (Greece),Dominica (Lesser Antilles) and the Bay of Plenty (New Zealand)[J].Marine Chemistry,2015,173:244-252.
[82]
ROSHAN S,WU J F,JENKINS W J.Long-range transport of hydrothermal dissolved Zn in the tropical South Pacific[J].Marine Chemistry,2016,183:25-32.
[83]
KIM T,OBATA H,KONDO Y,et al.Distribution and speciation of dissolved zinc in the western North Pacific and its adjacent seas[J].Marine Chemistry,2015,173:330-341.
[84]
ANDERSON M A,MOREL F M M,GUILLARD R R L.Growth limitation of a coastal diatom by low zinc ion activity[J].Nature,1978,276(5683):70-71.
[85]
SAITO M A,GOEPFERT T J.Zinc-cobalt colimitation of Phaeocystis Antarctica[J].Limnology and Oceanography,2008,53(1):266-275.
[86]
BAARS O,CROOT P L.The speciation of dissolved zinc in the Atlantic sector of the Southern Ocean[J].Deep Sea Research Part Ⅱ:Topical Studies in Oceanography,2011,58(25/26):2720-2732.
[87]
DONAT J R,BRULAND K W.A comparison of two voltammetric techniques for determining zinc speciation in Northeast Pacific Ocean waters[J].Marine Chemistry,1990,28(4):301-323.
[88]
ELLWOOD M J,VAN DEN BERG C M G.Zinc speciation in the Northeastern Atlantic Ocean[J].Marine Chemistry,2000,68(4):295-306.
[89]
JAKUBA R W,SAITO M A,MOFFETT J W,et al.Dissolved zinc in the subarctic North Pacific and Bering Sea:Its distribution,speciation,and importance to primary producers[J].Global Biogeochemical Cycles,2012,26(2):2015
[90]
ELLWOOD M J.Zinc and cadmium speciation in subantarctic waters east of New Zealand[J].Marine Chemistry,2004,87(1/2):37-58.
[91]
MULLER F L L,GULIN S B,KALV Y Å.Chemical speciation of copper and zinc in surface waters of the western Black Sea[J].Marine Chemistry,2001,76(4):233-251.
[92]
MULLER F L L,KESTER D R.Measurement of the different forms of zinc in Narragansett Bay water based on the rate of uptake by a chelating resin[J].Marine Chemistry,1991,33(1/2):171-186.
[93]
XUE H B,SIGG L.Zinc speciation in lake waters and its determination by ligand exchange with EDTA and differential pulse anodic stripping voltammetry[J].Analytica Chimica Acta,1994,284(3):505-515.
[94]
JAKUBA R W,MOFFETT J W,SAITO M A.Use of a modified,high-sensitivity,anodic stripping voltammetry method for determination of zinc speciation in the North Atlantic Ocean[J].Analytica Chimica Acta,2008,614(2):143-152.
[95]
LOHAN M C,BUCK K N,SANDER S G.Organic ligands-A key control on trace metal biogeochemistry in the oceans[J].Marine Chemistry,2015,173:1-2.
[96]
PRICE N M,MOREL F M M.Cadmium and cobalt substitution for zinc in a marine diatom[J].Nature,1990,344(6267):658-660.
[97]
LEE JG,MOREL F M M.Replacement of zinc by cadmium in marine phytoplankton[J].Marine Ecology Progress Series,1995,127(1):305-309.
[98]
BRULAND K W.Complexation of cadmium by natural organic ligands in the central North Pacific[J].Limnology and Oceanography,1992,37(5):1008-1017.
[99]
SCARPONI G,CAPODAGLIO G,TOSCANO G,et al.Speciation of lead and cadmium in antarctic seawater:comparison with areas subject to different anthropic influence[J].Microchemical Journal,1995,51(1/2):214-230.
[100]
BAARS O,ABOUCHAMI W,GALER S J G,et al.Dissolved cadmium in the Southern Ocean:Distribution,speciation,and relation to phosphate[J].Limnology and Oceanography,2014,59(2):385-399.
[101]
WEN L S,JIANN K T,SANTSCHI P H.Physicochemical speciation of bioactive trace metals(Cd,Cu,Fe,Ni) in the oligotrophic South China Sea[J].Marine Chemistry,2006,101(1/2):104-129.
[102]
ABBASSE G,OUDDANE B,FISCHER J C.Determination of total and labile fraction of metals in seawater using solid phase extraction and inductively coupled plasma atomic emission spectrometry (ICP-AES)[J].Journal of Analytical Atomic Spectrometry,2002,17(10):1354-1358.
[103]
CAPODAGLIO G,SCARPONI G,TOSCANO G,et al.Speciation of trace metals in seawater by anodic stripping voltammetry:Critical analytical steps[J].Analytical and Bioanalytical Chemistry,1995,351(4/5):386-392.
[104]
XUE H B,SIGG L.Cadmium speciation and complexation by natural organic ligands in fresh water[J].Analytica Chimica Acta,1998,363(2/3):249-259.
[105]
BOYLE E A,CHAPNICK S D,SHEN G T,et al.Temporal variability of lead in the western North Atlantic[J].Journal of Geophysical Research:Oceans,1986,91(C7):8573-8593.
[106]
BRIDGESTOCK L,VAN DE FLIERDT T,REHKÄMPER M,et al.Return of naturally sourced Pb to Atlantic surface waters[J].Nature Communications,2016,7:12921.
[107]
BILLER D V,BRULAND K W.Analysis of Mn,Fe,Co,Ni,Cu,Zn,Cd,and Pb in seawater using the Nobias-chelate PA1 resin and magnetic sector inductively coupled plasma mass spectrometry (ICP-MS)[J].Marine Chemistry,2012,130/131:12-20.
[108]
FLEGAL A R,MARING H,NIEMEYER S.Anthropogenic lead in Antarctic sea water[J].Nature,1993,365(6443):242-244.
[109]
CAPODAGLIO G,COALE K H,BRULAND K W.Lead speciation in surface waters of the eastern North Pacific[J].Marine Chemistry,1990,29:221-233.
[110]
KOZELKA P B,SAÑUDO-WILHELMY S,FLEGAL A R,et al.Physico-chemical speciation of lead in South San Francisco Bay[J].Estuarine,Coastal and Shelf Science,1997,44(6):649-658.
[111]
COBELO-GARCÍA A,PREGO R.Chemical speciation of dissolved copper,lead and zinc in a ria coastal system:the role of resuspended sediments[J].Analytica Chimica Acta,2004,524(1/2):109-114.
[112]
BI Z S,SALAVN P,VAN DEN BERG C M G.The speciation of lead in seawater by pseudopolarography using a vibrating silver amalgam microwire electrode[J].Marine Chemistry,2013,151:1-12.
[113]
FISCHER E,VAN DEN BERG C M G.Determination of lead complexation in lake water by cathodic stripping voltammetry and ligand competition[J].Analytica Chimica Acta,2001,432(1):11-20.
[114]
BI Z S,CHAPMAN C S,SALAVN P,et al.Determination of lead and cadmium in sea-and freshwater by anodic stripping voltammetry with a vibrating bismuth electrode[J].Electroanalysis,2010,22(24):2897-2907.
[115]
KYRISOGLOU C,ECONOMOU A.Trace metal analysis by stripping voltammetry at a bismuth-coated iridium microdisc electrode[J].Sensing in Electroanalysis,2012,7:163-174.
[116]
BI Z S,SALAVN P,VAN DEN BERG C M G.Study of bare and mercury-coated vibrated carbon,gold and silver microwire electrodes for the determination of lead and cadmium in seawater by anodic stripping voltammetry[J].Electroanalysis,2013,25(2):357-366.
[117]
OMANOVI? D,GARNIER C D,GIBBON-WALSH K,et al.Electroanalysis in environmental monitoring:Tracking trace metals-A mini review[J].Electrochemistry Communications,2015,61:78-83.
[118]
NOYHOUZER T,MANDLER D.A new electrochemical flow cell for the remote sensing of heavy metals[J].Electroanalysis,2013,25(1):109-115.
[119]
ZHANG W,WAN H,SUN Q Y,et al.Smart voltammetric procedure in an automatic trace metal monitoring system for expanding the measurement range of a gold-band microelectrode array[J].Measurement Science and Technology,2013,24(4):1347-1354.
[120]
ZIRINO A,VANDERWEELE D A,BELLI S L,et al.Direct measurement of Cu (Ⅱ)aq in seawater at pH 8 with the jalpaite ion-selective electrode[J].Marine Chemistry,1998,61(3/4):173-184.
[121]
TEMMINGHOFF E J M,PLETTE A C C,VAN ECK R,et al.Determination of the chemical speciation of trace metals in aqueous systems by the Wageningen Donnan Membrane Technique[J].Analytica Chimica Acta,2000,417(2):149-157.
[122]
LI L,PALA F,HASKINS J,et al.Measurement of free cu ion activity in seawater using a passive-equilibrium Sonic-Assisted Free Ion Recorder (SAFIR)[J].Environmental Science and Technology,2011,45(13):5660-5667.