A5031472325- Atmospheric chemistry and aerosols
- Advanced Chemical Sensor Technologies
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Water Quality Monitoring and Analysis
- Analytical Chemistry and Sensors
- Atmospheric aerosols and clouds
- Indoor Air Quality and Microbial Exposure
- Analytical chemistry methods development
- Spectroscopy and Laser Applications
- Gas Sensing Nanomaterials and Sensors
- Microfluidic and Capillary Electrophoresis Applications
- Vehicle emissions and performance
- Atmospheric Ozone and Climate
- Odor and Emission Control Technologies
- Dye analysis and toxicity
- Toxic Organic Pollutants Impact
- Electrochemical Analysis and Applications
- Analytical Chemistry and Chromatography
- Corrosion Behavior and Inhibition
- Biosensors and Analytical Detection
- Environmental and Analytical Chemistry Studies
- Heavy metals in environment
- Physical Education and Gymnastics
- Environmental Sustainability and Education
Universidade Estadual Paulista (Unesp)
2014-2024
Centro Universitário de Araraquara
1999-2024
University of Nottingham
2024
Universidade de São Paulo
2010-2022
University of Birmingham
2004-2005
University of Cambridge
2004
Universidade Paulista
2004
Texas Tech University
1995-1997
Abstract The determination of temperature is essential in many applications the biomedical, technological, and industrial fields. Optical thermometry appears to be an excellent alternative for conventional electric sensors because it a non-contact method that offers fast response, electromagnetic passivity, high sensitivity. In this paper, we propose optical thermometer probe comprising Er 3+ /Yb co-doped tellurite glass attached tip fibre optically coupled laser source portable USB...
Hydrogen sulfide is a highly corrosive, harmful, and toxic gas produced under anaerobic conditions within industrial processes or in natural environments, plays an important role the sulfur cycle. According to U.S. Occupational Safety Health Administration (OSHA), permissible exposure limit (during 8 hours) 10 ppm. Concentrations of 20 ppm are threshold for critical health issues. In workplace environments with human subjects frequently exposed H2S, e.g., during petroleum extraction...
Surface‐based measurements of atmospheric formic acid (HCOOH), acetic (CH 3 COOH), sulfur dioxide (SO 2 ), hydrogen chloride (HCl), and nitric (HNO ) were made in central São Paulo State, Brazil, between April 1999 March 2000. Mean concentrations 9.0 ppb 1.3 4.9 0.3 0.5 ). Concentrations sugar cane burning plumes 1160–4230 360–1750 10–630 4–210 14–90 Higher ambient SO , HCl HNO measured during the season (May–November). increased evening, HCOOH CH COOH lowest morning, with peak levels...
Hydrogen sulfide is found in many environments including sewage systems, petroleum extraction platforms, kraft paper mills, and exhaled breath, but its determination at ppb levels remains a challenge within the analytical chemistry field. Off-line methods for analysis of gaseous reduced sulfur compounds can suffer from variety biases associated with high reactivity, sorptive losses, atmospheric oxidative reactions. Here, we present portable, online, disposable gas sensor platform situ...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalytical Chemistry in a Liquid Film/DropletArnaldo A. Cardoso and Purnendu K. DasguptaCite this: Anal. Chem. 1995, 67, 15, 2562–2566Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August 1995https://pubs.acs.org/doi/10.1021/ac00111a011https://doi.org/10.1021/ac00111a011research-articleACS PublicationsRequest reuse permissionsArticle Views238Altmetric-Citations67LEARN ABOUT THESE...
Volatile sulfur compounds (VSCs) are among the most prevalent emitted pollutants in urban and rural atmospheres. Mainly because of versatility regarding its oxidation state (2- to 6+), VSCs present a wide variety redox-environments, concentration levels, molar ratios. Among VSCs, hydrogen sulfide dioxide considered relevant have simultaneously been detected within naturally anthropogenically caused emission events (e.g., volcano emissions, food production industries, coal pyrolysis, various...
Ozone is a strong oxidant that globally used as disinfection agent for many purposes including indoor building air cleaning, during food preparation procedures and control killing of bacteria such E. coli S. aureus. However, it has been shown effective ozone concentrations controlling e.g., microbial growth need to be higher than 5 ppm, thereby exceeding the recommended U.S. EPA threshold more 10 times. Consequently, real-time monitoring concentration levels essential. Here, we describe...
The size distributed composition of ambient aerosols is used to explore seasonal differences in particle chemistry and show that dry deposition fluxes soluble species, including important plant nutrients, increase during periods biomass (sugar cane trash) burning São Paulo State, Brazil. Measurements were made at a single site centrally located the State's sugar growing region but away from immediate vicinity burns, so air sampled was representative regional background. Calculation ion...
The use of chemical preservative compounds is common in the food products industry. Caramel color most usual additive used beverages, desserts, and breads worldwide. During its fabrication process, 2- 4-methylimidazole (MeI), highly carcinogenic compounds, are generated. In these cases, development reliable analytical methods for monitoring undesirable necessary. primary procedure analysis 4-MeI using LC- or GC-MS techniques. These procedures time-consuming require large amounts organic...
A new simple method for determination of ozone in ambient air is presented. The reaction employed based on the known ozonolysis indigo dye. indigotrisulfonate molecule contains one carbon–carbon double bond (C═C), which reacts with and generates isatinsulfonates sulfoanthranilate. quantitatively formed sulfoanthranilate presents fluorescence (λex 245 nm, λem 400 nm). Ozone was collected using two cellulose filters coated 40 μL 1.0 × 10− 3 mol L− 1 indigotrisulfonate. analytical response...
Sampling and measurements without extraction steps.
Atmospheric particulate matter (PM) is genotoxic and recently was classified as carcinogenic to humans by the International Agency for Research on Cancer. PM chemical composition varies depending source atmospheric conditions. The Salmonella /microsome assay most used mutagenicity test can identify major classes responsible observed mutagenicity. objective of this work characterize samples from a countryside city, Limeira, Brazil, which influenced heavy traffic sugar cane biomass burning....