Titration of Mercury with Bis(2-hydroxyethyl)dithiocarbamate

Fritz, James S.; Sutton, Scott

doi:10.1021/ac60116a020

Cited by 29 publications

(21 citation statements)

References 16 publications

(4 reference statements)

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“…Reagents. Ammonium bis(2-hydroxyethyl)dithiocarbamate was prepared by a modification of the procedure described by Fritz and Sutton (24). Dissolve 10.5 (0.10 mol) of diethanolamine in 50 mL of methanol.…”

Section: Discussionmentioning

confidence: 99%

Determination of cobalt, copper, mercury, and nickel as bis(2-hydroxyethyl)dithiocarbamate complexes by high-performance liquid chromatography

King¹,

Fritz²

1987

Anal. Chem.

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Section: Discussionmentioning

confidence: 99%

Determination of cobalt, copper, mercury, and nickel as bis(2-hydroxyethyl)dithiocarbamate complexes by high-performance liquid chromatography

King¹,

Fritz²

1987

Anal. Chem.

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“…With the increase of EDTA concentration, Hg 2+ was masked, and the response to organic mercury was effectively enhanced. It was supposed that the EDTA assisted the competition reaction between organic mercury and CuDDTC 2 complex, 30 as indicated by the The colorimetric response time of the CuDDTC 2 −Au NPbased probe to organic mercury was first investigated prior to the sensitivity study. As shown in Figure S3B (Supporting Information), the equilibrium was achieved in 2 min, and thus 2 min was selected as the reaction time in the following tests for organic mercury.…”

Section: Scheme 1 Schematic Illustrations Of (A) Au Np-based Colorimmentioning

confidence: 99%

Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles

Chen

2014

ACS Appl. Mater. Interfaces

222

109

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The speciation analysis of heavy metal pollutants is very important because different species induce different toxicological effects. Nanomaterial-assisted optical sensors have achieved rapid developments, displaying wide applications to heavy metal ions but few to metal speciation analysis. In this work, a novel colorimetric nanosensor strategy for mercury speciation was proposed for the first time, based on the analyte-induced aggregation of gold nanoparticles (Au NPs) with the assistance of a thiol-containing ligand of diethyldithiocarbamate (DDTC). Upon the addition of mercury species, because Hg-DDTC was more stable than Cu-DDTC, a placedisplacement between Hg species and Cu 2+ would occur, and thereby the functionalized Au NPs would aggregate, resulting in a color change. Moreover, by virtue of the masking effect of ethylenediaminetetraacetic acid (EDTA), the nanosensor could readily discriminate organic mercury and inorganic mercury (Hg 2+ ), and it is thus anticipated to shed some light on the colorimetric sensing of organic mercury. So, a direct, simple colorimetric assay for selective determination of Hg species was obtained, presenting high detectability, such as up to 10 nM for Hg 2+ and 15 nM for methylmercury. Meanwhile, the strategy offered excellent selectivity toward mercury species against other metal ions. The simple, rapid, and sensitive label-free colorimetric sensor for the determination of Hg species provided an attractive alternative to conventional methods, which usually involve sophisticated instruments, complicated processes, and long periods of time. More importantly, by using mercury as a model, an excellent nanomaterial-based optical sensing platform can be developed for speciation analysis of trace heavy metals, which can lead to nanomaterials stability change through smart functionalization and reasonable interactions.

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“…A review of the dithiocarbamate literature showed that bis(2-hydroxyethyl)dithiocarbamate (HEDC) has been used as a colorimetric reagent to form a water-soluble, intensly colored complex with copper(II) (14,15). HEDC has also been used as a titrant in the determination of mercury(II) (16) and as a colorimetric reagent in the determination of molybdenum (VI), uranium(VI) (17), and nickel(II) (18). The sodium salt of HEDC (designated NaHEDC) was selected as the most promising reagent for this study.…”

mentioning

confidence: 99%

Concentration of metal ions by complexation with sodium bis(2-hydroxyethyl)dithiocarbamate and sorption on XAD-4 resin

King¹,

Fritz²

1985

Anal. Chem.

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Titration of Mercury with Bis(2-hydroxyethyl)dithiocarbamate

Abstract: A direct titrimetric method permits the determination of mercury (II) in the presence of chloride, bromide, and numerous metal ions. The mercury is titrated with a standard dithiocarbamate solution in the presence of

Cited by 29 publications

References 16 publications

Determination of cobalt, copper, mercury, and nickel as bis(2-hydroxyethyl)dithiocarbamate complexes by high-performance liquid chromatography

Determination of cobalt, copper, mercury, and nickel as bis(2-hydroxyethyl)dithiocarbamate complexes by high-performance liquid chromatography

Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles

Concentration of metal ions by complexation with sodium bis(2-hydroxyethyl)dithiocarbamate and sorption on XAD-4 resin

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