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Determination of synthetic dyes in selected foodstuffs by high performance liquid chromatography with UV-DAD detection
A relatively fast method was developed and applied to the determination of selected synthetic food dyes (Sunset Yellow, Tartrazine, Amaranth, Brilliant Blue and Red-40) in three different kinds ofExpand
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Occupational exposure to formaldehyde in an institute of morphology in Brazil: a comparison of area and personal sampling
Background, aims, and scopeFormaldehyde (FA) is a harmful chemical, which is classified as carcinogenic to humans (Group 1) by the International Agency for Research on Cancer. Solutions of FA thatExpand
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PAHs in SD:Polycyclic aromatic hydrocarbons levels in street dust in the central area of Niterói City, RJ, Brazil
Polycyclic aromatic hydrocarbons (PAHs) were studied in street dust (SD) samples collected in the center of Niterói, a tropical city located in the State of Rio de Janeiro, Brazil, at the margins ofExpand
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Multivariate optimization of a spectrophotometric method for copper determination in Brazilian sugar-cane spirits using the Doehlert design
Abstract This present work reports a multivariate optimization of a spectrophotometric method for copper determination in sugar-cane spirits, exploring the reaction of Cu(II) with phenylfluorone (PF)Expand
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Polycyclic aromatic hydrocarbons (PAHs) in street dust of Rio de Janeiro and Niterói, Brazil: Particle size distribution, sources and cancer risk assessment.
Fifteen polycyclic aromatic hydrocarbons (PAHs) were analyzed in two fractions (<63μm and 63-850μm) of street dust samples collected in different urban areas of Rio de Janeiro and Niterói cities,Expand
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The harmful chemistry behind krokodil (desomorphine) synthesis and mechanisms of toxicity.
"Krokodil" is the street name for the homemade injectable mixture that has been used as a cheap substitute for heroin. Its use begun in Russia and Ukraine and nowadays is being spread over severalExpand
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Validation of a method of high performance liquid chromatography with fluorescence detection for melamine determination in UHT whole bovine milk
Abstract A method of high performance liquid chromatography with fluorescence detection (HPLC-Fluo), based on previous studies of the natural fluorescence emission of melamine (250/365 nm), wasExpand
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Evaluation of C1–C13 carbonyl compounds by RRLC-UV in the atmosphere of Niterói City, Brazil
Abstract In this present work, the concentration of 31 carbonyl compounds (CC) were determined in the atmosphere of Niteroi City, RJ, Brazil, between January 9th and 14th, 2010, in 7 periods of twoExpand
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Is it possible to screen for milk or whey protein adulteration with melamine, urea and ammonium sulphate, combining Kjeldahl and classical spectrophotometric methods?
The Kjeldahl method and four classic spectrophotometric methods (Biuret, Lowry, Bradford and Markwell) were applied to evaluate the protein content of samples of UHT whole milk deliberatelyExpand
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The harmful chemistry behind "krokodil": Street-like synthesis and product analysis.
"Krokodil" is the street name for a drug, which has been attracting media and researchers attention due to its increasing spread and extreme toxicity. "Krokodil" is a homemade injectable mixtureExpand
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