Laser-Enhanced Ionization of Mercury Atoms in an Inert Atmosphere with Avalanche Amplification of the Signal

Clevenger, W. L.; Matveev, O. I.; Cabredo, Susana; Omenetto, N.; Smith, Benjamin W.; Winefordner, J. D.

doi:10.1021/ac9702148

Cited by 14 publications

(7 citation statements)

References 13 publications

(17 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further increase in sensitivity can be achieved with avalanche ionisation, i.e., with the 10 3 ± 10 5 -fold multiplied current of the primary electron ± ion pairs. 213,214 Application of nanosecond lasers and nanosecond-resolution registration electronics in some cases enables separating the fast response due to the parasitic molecular ionisation from the slower collisional ionisation response in LEIS at reduced pressures. 215 The parasitic ionisation can also be minimised by shielding the flame from air with an outer concentric argon flow.…”

Section: Atomic Ionisation Spectrometrymentioning

confidence: 99%

See 1 more Smart Citation

Prospects in analytical atomic spectrometry

Bol’shakov¹,

Ганеев²,

Nemets³

2006

Russ. Chem. Rev.

View full text Add to dashboard Cite

The trends in the development of five main branches of The trends in the development of five main branches of atomic spectrometry, atomic spectrometry, viz viz., absorption, emission, mass, fluores-., absorption, emission, mass, fluorescence and ionisation spectrometry, are analysed. The advantages cence and ionisation spectrometry, are analysed. The advantages and drawbacks of various techniques in atomic spectrometry are and drawbacks of various techniques in atomic spectrometry are considered. Emphasised are the applications of analytical plasma-considered. Emphasised are the applications of analytical plasmaand laser-based methods. The problems and prospects in the and laser-based methods. The problems and prospects in the development in respective fields of analytical instrumentation development in respective fields of analytical instrumentation are discussed. The bibliography includes 279 references are discussed. The bibliography includes 279 references. .

show abstract

Section: Atomic Ionisation Spectrometrymentioning

confidence: 99%

“…Use of a miniburner reduces the effect of aerosol dilution during the analysis. Such schemes open up the possibilities of detecting trace impurities in each laser ablation pulse (15 atoms per pulse 214 ). Moreover, it is possible to simultaneously determine several elements (Pb, In) in samples.…”

Section: Atomic Ionisation Spectrometrymentioning

confidence: 99%

Prospects in analytical atomic spectrometry

Bol’shakov¹,

Ганеев²,

Nemets³

2006

Russ. Chem. Rev.

View full text Add to dashboard Cite

show abstract

“…Cold-vapor atomic absorption spectrometry (CV-AAS) is one of the most popular techniques for determining mercury in a wide variety of samples [14][15][16][17][18][19]. Generally, this technique is applied to determine the total mercury content [20]. Despite the considerable global concern about mercury contamination of commercial and recreational fishery products, there is paucity of information on mercury in fish from markets in Ghana.…”

Section: Introductionmentioning

confidence: 99%

Total Levels of Mercury Concentrations in Marine Fish - Kumasi, Ghana

Debrah

Ribeiro

Baah

2020

EJNFS

View full text Add to dashboard Cite

Fish is an excellent source of high biological value protein, is low in saturated fat, and contains polyunsaturated fatty acids and some vitamins. Mercury occurs naturally in the environment as a result of human activities. In aquatic environments, inorganic mercury is converted into methylmercury (the most common form of organic mercury) by microorganisms present in sediment through accumulations in the aquatic food chain, including in fish and shellfish. Fish absorb methyl mercury from water as it passes over their gills and as they feed on organisms. The objective of the study is to determine mercury pollution levels in fresh fish in Central Market, Kumasi, Ghana. A total of 42 fished were sampled randomly in separate labelled zip lock bags and stored in cold ice chest at different periods comparing of 27 different species after identification. Individual edible fish dorsal muscle tissue was taken and wet dried and analyzed using Cold Vapor Atomic Absorption Spectroscopy (CV-AAS) method which is really simple, accurate and rapid. The concentration of mercury in fish samples from the marine sea were determined with a mixture of HNO3, HClO4 and H2SO4 for complete oxidation of the organic tissue. The results showed that there was substantial amount of mercury in the fish samples ranged from 15.29 - 981.99 ng/g or ppb wet weight which is less than the FAO/WHO limits of 0.5 ppm wet weight. The study showed low concentrations of mercury in the fish species which do not appear to contribute any significant mercury exposure to the general population. It suggests that a relatively clean marine environment due to minimal industrial activity in the region that has not yet been significantly impacted by mercury contamination.

show abstract

“…Measuring such low levels requires preliminary mercury vapour concentration and sophisticated analytical equipment. Current laboratory techniques for determining the presence of the element are mainly based on spectroscopic and electrochemical methods [1,2]. While these techniques are very sensitive, they are not suitable for in situ monitoring.…”

Section: Introductionmentioning

confidence: 99%

SAW Sensor for Mercury Vapour Detection

2012

View full text Add to dashboard Cite

Mercury is the element commonly applied in industry. Because of poisoning properties the monitoring of the mercury vapour concentration in the environment is very important. Mercury forms amalgams in connection with gold that causes a change in the electrical resistance and mass of the gold specimens. This eect was applied to measure mercury vapour concentration in the environment using surface acoustic wave technology. Two kinds of surface acoustic wave mercury sensors have been described in the paper. First one utilizes a thin lm of gold deposited between aluminium interdigital transducers and reectors of two-port surface acoustic wave resonator, and the second one golden interdigital transducers and reectors without any sensitive lm between them.

show abstract

Laser-Enhanced Ionization of Mercury Atoms in an Inert Atmosphere with Avalanche Amplification of the Signal

Cited by 14 publications

References 13 publications

Prospects in analytical atomic spectrometry

Prospects in analytical atomic spectrometry

Total Levels of Mercury Concentrations in Marine Fish - Kumasi, Ghana

SAW Sensor for Mercury Vapour Detection

Contact Info

Product

Resources

About