Trace Determination of Mercury: A Review

Clevenger, W. L.; Smith, B. W.; Winefordner, J. D.

doi:10.1080/10408349708050578

Cited by 182 publications

(100 citation statements)

References 149 publications

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“…So far there is only one report on the generation of a volatile copper compound [6], the growing literature relating to the determination of lead has been reviewed recently [7], and there is a vast literature describing the determination of Hg by the so-called "cold vapor" method [8], though many of these procedures use Sn(II) as the reagent for production of Hg 0 .…”

Section: Introductionmentioning

confidence: 99%

Determination of cadmium by flow injection-chemical vapor generation-atomic absorption spectrometry

Vargas-Razo¹,

Tyson²

2000

Fresenius' Journal of Analytical Chemistry

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A method was developed for the generation of a "cold vapor" of cadmium by means of flow injectionchemical vapor generation from aqueous samples, the determination being conducted with an atomic absorption spectrometer (Pyrex glass T-cell). Several gas-liquid separator designs, atomizer designs, and the effect of several reagents previously reported as sensitivity enhancers (including cobalt, nickel, thiourea and didodecyl-dimethylammonium bromide) were investigated. The limit of detection, calculated as the concentration giving a signal equal to three times the standard deviation of the blank, was 16 ng L -1 , and the relative standard deviation was 1.4% for a concentration of 2 µg L -1 and 3.8% for 0.1 µg L -1 . The addition of nickel and thiourea to the samples provided improved tolerance to the interference of coexisting ions. Two NIST certified reference materials, Montana Soil and Apple Leaves (respectively containing 41.7 ± 0.25 mg kg -1 Cd and 0.013 ± 0.002 mg kg -1 Cd) were accurately analyzed. The interference of lead was overcome by coprecipitation with barium sulfate, and the experimental values obtained were 41 ± 1 mg kg -1 Cd and 0.013 ± 0.002 mg kg -1 Cd, respectively.

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Section: Introductionmentioning

confidence: 99%

Determination of cadmium by flow injection-chemical vapor generation-atomic absorption spectrometry

Vargas-Razo¹,

Tyson²

2000

Fresenius' Journal of Analytical Chemistry

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“…Therefore, mercury poses a worldwide threat to public health and the environment, and detection of mercury in water has attracted a lot of research interest. [1,5] There are a number of analytical techniques developed with exceptional sensitivity for mercury detection, including various types of spectrometry, voltammetry, and chromatography. [5] However, many of these methods require complicated sample preparation and sophisticated instrumentations.…”

Section: Introductionmentioning

confidence: 99%

“…[1,5] There are a number of analytical techniques developed with exceptional sensitivity for mercury detection, including various types of spectrometry, voltammetry, and chromatography. [5] However, many of these methods require complicated sample preparation and sophisticated instrumentations. An alternative approach towards mercury detection is to develop portable sensors.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of DNA on Magnetic Microparticles for Mercury Enrichment and Detection with Flow Cytometry

Huang

Liu

2011

Chemistry A European J

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Mercury detection in water has attracted a lot of research interest due to its highly toxic nature and adverse environmental impact. In particular, the recent discovery of specific binding of Hg (II) to thyminerich DNA resulting in T-Hg (II) -T base pairs has led to the development of a number of sensors with different signaling mechanisms. However, majority of such sensors were nonimmobilized. Immobilization, on the other hand, allows active mercury adsorption, signal amplification, and sensor regeneration. In this work, we immobilized a thymine-rich DNA on a magnetic microparticle surface via biotin-streptavidin interactions. In the presence of Hg (II) , the DNA changes from a random coil structure into a hairpin, upon which SYBR Green I binds to emit green fluorescence. Detection was carried out using flow cytometry where fluorescence intensity increased ~9-fold in the presence of mercury and the binding of mercury reached equilibrium in less than 2 min. The sensor showed a unique samplevolume dependent fluorescence signal change where a higher fluorescence was obtained with a larger sample volume, suggesting that the particles can actively adsorb Hg (II) . Detection limits of 5 nM (1 ppb) and 14 nM (2.8 ppb) were achieved in pure buffer and in mercury spiked Lake Ontario water samples, respectively.

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“…12,18 Spectrophotometry has also been used for mercury determination; however, liquid-liquid or solidliquid extraction is required in order to enhance the method sensitivity of the method, making these procedures tedious and increasing the possibility of introducing errors in the analysis, mainly due to the excessive sample manipulation.…”

Section: Introductionmentioning

confidence: 99%

“…Various analytical methods have been proposed for mercury determination as atomic fluorescence spectrometry, 12,13 atomic absorption spectrometry, 12,14 inductively coupled plasma-optical emission or -mass spectrometry, 12,15,16 stripping voltammetry, 12,17 and X-ray fluorescence. 12,18 Spectrophotometry has also been used for mercury determination; however, liquid-liquid or solidliquid extraction is required in order to enhance the method sensitivity of the method, making these procedures tedious and increasing the possibility of introducing errors in the analysis, mainly due to the excessive sample manipulation.…”

Section: Introductionmentioning

confidence: 99%