Solvent extraction of dithiocarbamate complexes and back-extraction with mercury(II) for determination of trace metals in seawater by atomic absorption spectrometry

Lo, Jason; Yu, Jimmy C.; Hutchison, F. I.; Wai, Chien M.

doi:10.1021/ac00251a029

Cited by 100 publications

(15 citation statements)

References 30 publications

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“…Immediately after, they were transferred to the laboratory, water samples were filtered through 0.45 µm membrane filters and filtrate was acidified to pΗ < 2 with analytical grade concentrated HNO 3 . As sampling through direct aspiration could not be performed using graphite furnace due to high background absorbance, for the metals except mercury, metal extraction was done using the method as described by Lo (1982) with 1% ammonium pyrrolidine dithiocarbamate and 1% sodium diethydithiocarbamate. Another set of water samples collected from each sampling site was processed for Hg analysis using hydride vapour generation system.…”

Section: Sampling and Processing Of Water And Sediments For Metal Anamentioning

confidence: 99%

Heavy metal levels in two food fish species from Negombo estuary, Sri Lanka: Relationships with the body size

Indrajith¹,

Pathiratne

2010

Sri Lanka J. Aquat.

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The present study was carried out to assess the levels of eight metals viz. Pb, Cu, Cd, Ni, Cr, Mn, Hg and Zn in two species of food fish, Etroplus suratensis and Ambassis commersoni from Negombo estuary. The levels of Hg were analyzed by cold vapour atomic absorption spectrometry whereas the other metals were analyzed by flame/graphite furnace atomic absorption spectrometry. Total metal levels in muscle, gill and liver tissues of the fish showed a wide range. Accumulation of most metals in the tissues of the fish followed the increasing order, muscle < gills ≤ liver. Of the different metal levels detected in the fish, only the level of Cd in liver tissue of 6% of E. suratensis and 12% of A. commersoni exceeded the level specified for human consumption by European Union. Interspecies comparisons revealed that mean level of Zn in the muscle tissue of A. commersoni was two fold higher than that of E. suratensis. The levels of metals in the muscle tissue of both fish species were positively correlated with the body weight or body length of the fish. Based on the levels of Hg, Pb, and Cd in the fish, edible muscle of both fish species collected from the estuary was found to be safe for human consumption. However, heavy consumption of bigger size fish may pose a health risk to the consumers as there were strong positive correlations between body weight or body length and metal levels in muscle tissues of both species of fish. H.A.P. Indrajith et al./ Sri Lanka J. Aquat. Sci. 13 (2008): 63-81

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Section: Sampling and Processing Of Water And Sediments For Metal Anamentioning

confidence: 99%

Heavy metal levels in two food fish species from Negombo estuary, Sri Lanka: Relationships with the body size

Indrajith¹,

Pathiratne

2010

Sri Lanka J. Aquat.

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“…2) with strong complexing properties [1]. They exhibit very rich coordination chemistry with a large variety of transition metals (for reviews see [2][3][4][5][6][7][8][9][10]) and are used as vulcanizing [11][12] or analytical agents [13][14][15]. Thiuram disulfides (thiram), dithiocarbamate salts (nabam) or their complexes with iron (ferbam), manganese (maneb) and zinc (ziram, zineb, propineb, metiram) are well known as pesticides with an estimated annual global consumption of 25,000 -35,000 metric tons [16].…”

Section: Introductionmentioning

confidence: 99%

Targeting of Nuclear Factor-κB and Proteasome by Dithiocarbamate Complexes with Metals

Cvek

Dvořák²

2007

CPD

132

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Dithiocarbamates and their complexes with transition metals have been used as common pesticides, vulcanizing or analytical agents for decades. These compounds are one of the most reported inhibitors of nuclear factor-kappaB (NF-kappaB) signaling cascade. Recently, it has been found that dithiocarbamates are very potent inhibitors of proteasome. NF-kappaB plays a central role in the immune system and is described as a major actor in many of human cancers mainly because of its protective effects against apoptosis. Molecular mechanisms involved in regulation and function of NF-kappaB pathway have been elucidated recently. In particular, pivotal zinc containing proteins that alter NF-kappaB signal transduction were recognized. Additionally, proteasome system was found to be a key player in NF-kappaB pathway and is an attractive target for anticancer drug development. Collectively, the capability of dithiocarbamates to inhibit NF-kappaB and proteasome makes these compounds promising anticancer agents. This review focuses on the biological activity of dithiocarbamate coordination compounds with regard to their possible molecular targets in NF-kappaB signaling and proteasome (JAMM domain proteins). Future research should aim to find the most suitable dithiocarbamate coordination compounds for treatment of cancer and other diseases.

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“…Mercury is one of the most toxic, heavy metals found in solid and liquid waste from chloro-alkali, paint, paper/pulp, battery, pharmaceutical, oil refinery, and mining industries [23]. Dithiocarbamates are among the most common extractants used for removal of mercury from aqueous solution [23][24][25]. A number of mercury(II)-dithiocarbamates have been prepared and characterized in recent years [26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

“…Crystal structures of mercury(II)-dithiocarbamates show that they exist both as mononuclear ([Hg(S 2 CNR 2 ) 2 ]) and as binuclear complexes ([Hg(S 2 CNR 2 ) 2 ] 2 ). In mononuclear complexes, both dithiocarbamate ligands are coordinated S,S 0 -bidentate to the mercury surrounded by four sulfur donors [22][23][24][25][26][27][28][29][30][35][36][37], while binuclear molecules contain bidentate chelating ligands and pairs of chelating and bridging ligands [31-34, 37, 38]. In some cases, mononuclear units aggregate to form polymeric structures, for example, in bis[N,N-di(2-hydroxyethyl)dithiocarbamato-S,S 0 ] mercury(II) [39].…”

Section: Introductionmentioning

confidence: 99%

Mercury(II) complexes of pyrrolidinedithiocarbamate, crystal structure of bis{[μ²-(pyrrolidinedithiocarbamato-S,S ′)(pyrrolidinedithiocarbamato-S,S ′)mercury(II)]}

Altaf

Stœckli-Evans

Batool

et al. 2010

Journal of Coordination Chemistry

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Solvent extraction of dithiocarbamate complexes and back-extraction with mercury(II) for determination of trace metals in seawater by atomic absorption spectrometry

Cited by 100 publications

References 30 publications

Heavy metal levels in two food fish species from Negombo estuary, Sri Lanka: Relationships with the body size

Heavy metal levels in two food fish species from Negombo estuary, Sri Lanka: Relationships with the body size

Targeting of Nuclear Factor-κB and Proteasome by Dithiocarbamate Complexes with Metals

Mercury(II) complexes of pyrrolidinedithiocarbamate, crystal structure of bis{[μ²-(pyrrolidinedithiocarbamato-S,S ′)(pyrrolidinedithiocarbamato-S,S ′)mercury(II)]}

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Solvent extraction of dithiocarbamate complexes and back-extraction with mercury(II) for determination of trace metals in seawater by atomic absorption spectrometry

Cited by 100 publications

References 30 publications

Heavy metal levels in two food fish species from Negombo estuary, Sri Lanka: Relationships with the body size

Heavy metal levels in two food fish species from Negombo estuary, Sri Lanka: Relationships with the body size

Targeting of Nuclear Factor-&#954;B and Proteasome by Dithiocarbamate Complexes with Metals

Mercury(II) complexes of pyrrolidinedithiocarbamate, crystal structure of bis{[μ2-(pyrrolidinedithiocarbamato-S,S ′)(pyrrolidinedithiocarbamato-S,S ′)mercury(II)]}

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Targeting of Nuclear Factor-κB and Proteasome by Dithiocarbamate Complexes with Metals

Mercury(II) complexes of pyrrolidinedithiocarbamate, crystal structure of bis{[μ²-(pyrrolidinedithiocarbamato-S,S ′)(pyrrolidinedithiocarbamato-S,S ′)mercury(II)]}