Electrolytic hydride generation (EC-HG)—a sample introduction system with some special features

Denkhaus, Evelin; Golloch, Alfred; Guo, Xutao; Huang, Benli

doi:10.1039/b100185j

Cited by 76 publications

(42 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mercury cold vapor generation (CVG) has been most effectively used in the determination of mercury, and several reductants have been investigated for the reduction of Hg 2+ to Hg 0 , e.g., stannous chloride [7], sodium cyanotrihydroborate(III) [8], and most frequently, sodium/ potassium tetrahydroborate (THB) [9]. In addition, electrolytic "reductant" could also be used for the generation of mercury cold vapor [10,11].…”

Section: Introductionmentioning

confidence: 99%

Photo-induced cold vapor generation with low molecular weight alcohol, aldehyde, or carboxylic acid for atomic fluorescence spectrometric determination of mercury

et al. 2007

View full text Add to dashboard Cite

With UV irradiation, Hg 2+ in aqueous solution can be converted into Hg 0 cold vapor by low molecular weight alcohols, aldehydes, or carboxylic acids, e.g., methanol, formaldehyde, acetaldehyde, glycol, 1,2-propanediol, glycerol, acetic acid, oxalic acid, or malonic acid. It was found that the presence of nano-TiO 2 more or less improved the efficiency of the photo-induced chemical/cold vapor generation (photo-CVG) with most of the organic reductants. The nano-TiO 2 -enhanced photo-CVG systems can be coupled to various analytical atomic spectrometric techniques for the determination of ultratrace mercury. In this work, we evaluated the application of this method to the atomic fluorescence spectrometric (AFS) determination of mercury in cold vapor mode. Under the optimized experimental conditions, the instrumental limits of detection (based on three times the standard deviation of 11 measurements of a blank solution) were around 0.02-0.04 μg L −1 , with linear dynamic ranges up to 15 μg L −1 .The interference of transition metals and the mechanism of the photo-CVG are briefly discussed. Real sample analysis using the photo-CVG-AFS method revealed that it was promising for water and geological analysis of ultralow levels of mercury.

show abstract

Section: Introductionmentioning

confidence: 99%

Photo-induced cold vapor generation with low molecular weight alcohol, aldehyde, or carboxylic acid for atomic fluorescence spectrometric determination of mercury

et al. 2007

View full text Add to dashboard Cite

show abstract

“…At the same time, the PANI film could catalyze and accelerate the atomic Sn transformation to the SnH 4 . Comparatively, bare Pb electrode is prone to form alloys with analytes [22] and the active sites on its surface are easily blocked resulting to tin fluorescence signal intensity falling.…”

Section: Performance Of the Pani/pb Electrodementioning

confidence: 99%

Electrochemical hydride generation atomic fluorescence spectrometry for detection of tin in canned foods using polyaniline-modified lead cathode

Jiang

Gan

Wan

et al. 2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…6,7 Electrochemical hydride generation (EcHG) has been developed as an alternative to the chemical hydride generation (CHG) used in routine analysis because electrochemical hydride formation has several advantages compared to the wet chemical approach based on the borohydride-acid system. 8 An electrochemical hydride generator has been effectively combined with different analytical techniques for the determination of trace As, like inductively coupled plasma atomic emission spectrometry (ICP-AES), 9,10 microwave induced plasma atomic emission spectrometry (MIP-AES), 11 inductively coupled plasma mass spectrometry (ICP-MS), 12,13 microwave plasma torch optical emission spectrometry (MPT-OES), 14 atomic absorption spectrometry (AAS), [15][16][17][18][19][20] and atomic fluorescence spectrometry (AFS). 21 A few methods, based on chorographic separation or pre-reduction of high oxidation state, were developed for elemental speciation by EcHG system.…”

Section: Introductionmentioning

confidence: 97%

Determination of Inorganic Arsenic Species by Electrochemical Hydride Generation Atomic Absorption Spectrometry with Selective Electrochemical Reduction

Wang

2007

Chin. J. Chem.

View full text Add to dashboard Cite

A new direct procedure for the determination of inorganic arsenic species was developed by electrochemical hydride generation atomic absorption spectrometry (EcHG-AAS) with selective electrochemical reduction. The determination of inorganic arsenic species is based on the fact that As(III) shows significantly higher absorbance at low electrolytic currents than As(V) in 0.3 mol•L −1 H 2 SO 4 . The electrolytic current used for the determination of As(III) without considerable interferences of As(V) was 0.4 A, whereas the current for the determination of As(III) and As(V) was 1.2 A. For equal concentrations of As(III) and As(V) in a sample, the interferences of As(V) during the As(III) determination were smaller than 5%. The absorbance for As(V) could be calculated by subtracting that for As(III) measured at 0.4 A from the total absorbance for As(III) and As(V) measured at 1.2 A, and then the concentration of As(V) can be obtained by its calibration curve at 1.2 A. The methodology developed provided the detection limits of 0.3 and 0.6 ng•mL −1 for As(III) and As(V), respectively. The relative standard deviations were of 3.5% for 20 ng•mL −1 As(III) and 3.2% for 20 ng•mL −1 As(V). The method was successfully applied to determination of soluble inorganic arsenic species in Chinese medicine.

show abstract

Electrolytic hydride generation (EC-HG)—a sample introduction system with some special features

Cited by 76 publications

References 31 publications

Photo-induced cold vapor generation with low molecular weight alcohol, aldehyde, or carboxylic acid for atomic fluorescence spectrometric determination of mercury

Photo-induced cold vapor generation with low molecular weight alcohol, aldehyde, or carboxylic acid for atomic fluorescence spectrometric determination of mercury

Electrochemical hydride generation atomic fluorescence spectrometry for detection of tin in canned foods using polyaniline-modified lead cathode

Determination of Inorganic Arsenic Species by Electrochemical Hydride Generation Atomic Absorption Spectrometry with Selective Electrochemical Reduction

Contact Info

Product

Resources

About