Results 111 to 120 of about 36,252 (237)
Rapid magnetic microextraction to preconcentrate and determinate cadmium from environmental samples [PDF]
, 2019 A novel and greener ultrasonically assisted/modified cloud point extraction procedure for the preconcentration and extraction of trace cadmium from environmental samples was developed.
Cano-Pavón, José Manuel +6 more
core
Sequential determination of traces of As, Sb and hg by on-line magnetic solid phase extraction coupled with Hr-Cs-Cvg-Gfaas [PDF]
, 2017 A green and rapid method was developed for the simultaneous separation/preconcentration and sequential monitoring pf arsenic, antimony and mercury by flow injection magnetic solid phase extraction coupled with on-line chemical vapor generation and ...
Cano-Pavón, José Manuel +4 more
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Low level measurements of atmospheric DMS, H2S, and SO2 for GTE/CITE-3 [PDF]
This project involved the measurement of atmospheric dimethylsulfide (DMS) and hydrogen sulfide (H2S) as part of the GTE/CITE-3 instrument intercomparison program.
Cooper, David, Saltzman, Eric
core +1 more source
Detection of Trace Amounts of Toxic Metals in Environmental Samples by Laser-excited Atomic Fluorescence Spectrometry [PDF]
, 1992 Results for the direct determination of trace amounts of Pb and Cd in Antarctic and Greenland ancient ice and recent snow by laser-excited atomic fluorescence spectrometry (LEAFS) are presented.
Bolshov, Mikhail A. +5 more
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A Brief Overview of Nanomaterials in Inorganic Selenium Speciation
SeparationsAlthough total selenium content is still useful in many areas, knowledge of its speciation is gaining importance as its various chemical forms have different environmental effects, toxicities and biological utilization. Among several methods used for the
Krystyna Pyrzynska
doaj +1 more source
Determination of Pb using F3eO4 GO join to DPTH for ferrofluid based dispersive solid phase extraction [PDF]
, 2018 In this work has been described a green and rapid method the synthesis of Fe3O4@GO nanospheres via chemical covalent bonding method. The Fe3O4@GO DPTH was applied to ferrofluid based dispersive solid phase extraction of lead as a model analyte using an ...
Cano-Pavón, José Manuel +4 more
core
Journal of the Brazilian Chemical Society, 2002 A procedure for separation and pre-concentration of trace amounts of cadmium, copper, lead, nickel, and zinc in brine samples has been proposed. It is based on the adsorption of metal ions onto dithizone co-crystallized with microcrystalline naphthalene,
Costa Antônio C. Spínola +3 more
doaj
SeparationsOver the years, monitoring the quality of the environment, food, and human health has emerged as a fundamental objective of scientific investigation. Various analytical techniques have been devised and continually refined to ensure a high standard of ...
Ivan Notardonato, Pasquale Avino
doaj +1 more source
Simultaneous in-line concentration for spectrophotometric determination of cations and anions
Journal of the Brazilian Chemical Society, 2004 A flow system is proposed for simultaneous in-line concentration of cations and anions. A sliding-bar commutator was employed to insert an anion and a cation exchange column into a flowing sample stream for serial retention of the analytes.
Rocha Fábio R. P +2 more
doaj