formaldehyde concentration Articles

  • Toxic formaldehyde very common in homes

    EMSL Analytical provides formaldehyde testing solutions for industry and the public. Formaldehyde can be found in most homes across the country. The chemical is commonly used to manufacture numerous building materials and household items. The most significant source of formaldehyde in most homes is from pressed wood products made with formaldehyde containing adhesives. According to the EPA, “High ...


  • Formaldehyde problems for FEMA and many others

    There has been concern about the release of formaldehyde gas from construction material used in the trailer homes used by FEMA for temporary housing.  Why the concern over formaldehyde?  Formaldehyde is a gas at normal temperatures.  It is the simplest member of a class of organic chemicals called “aldehydes.”  Most common aldehydes, including formaldehyde, have a ...

  • Embalmers risk dangerous exposure to Formaldehyde

    Embalmers can be at risk of dangerous exposure to Formaldehyde. ...


    By PPM Technology

  • Formaldehyde in rainwater at Trombay, Mumbai: a coastal site in India

    Formaldehyde was measured in rainwater samples collected at a residential area of Trombay, Mumbai (a coastal site in India). A mean concentration of 2.1 µmo1/1 and a range of 0.4-11.0 µmol/l were observed. The mean formaldehyde concentration in rainwater has increased from 1.2 µmol/l in 1979 by a factor of about two at this site.Keywords: coastal site, formaldehyde, India, ...


    By Inderscience Publishers

  • Detect and Monitor Formaldehyde with PPM Technology`s Formaldemeter

    In order to ensure employees and the public are not exposed to dangerous levels of Formaldehyde in the air, it is advised to detect and monitor levels with a suitable detection instrument. PPM Technology has significant experience in the design and development of instruments for accurate detection and measurement of Formaldehyde concentrations in the air. Our Formaldemeter ...


    By PPM Technology

  • DNA-protein crosslinks induced by formaldehyde and its repair process

    KCL-SDS assay was used to explore DNA-Protein Crosslinks (DPC) effect induced by formaldehyde (FA) and the repair. Gaseous FA could cause DPC at concentrations as 1.0 mg m−3 and 3.0 mg m−3 (p ...


    By Inderscience Publishers

  • Formaldehyde and Aromatic Volatile Hydrocarbons in the Indoor Air of Egyptian Office Buildings

    Indoor and outdoor measurements of formaldehyde and the aromatic hydrocarbons: benzene, toluene, ethylbenzene, m,p-xylene and o-xylene (BTEX) were conducted at six offices in a suburban area in Giza, Egypt, during the winter 2003-04 season. The mean indoor level of formaldehyde was 59.79ppb in offices where there was no smoking and 85.01ppb in offices where people smoked. The highest mean level ...


    By SAGE Publications

  • Determination of formaldehyde content in toys using UV/Vis Spectrometry

    As product safety regulations for industry are becoming stricter, more testing at lower levels is required for toxic elements or hazardous organic chemicals such as formaldehyde in children’s toys/clothing. Formaldehyde resins are used in fabrics to bind pigments to the cloth, as a fire retardant and to provide stiffness. In cotton and cottonblend fabrics they are used to enhance wrinkle ...


    By PerkinElmer, Inc.

  • High concentrations of Aldehydes can be found in the hospital environment

    Both Formaldehyde and Glutaraldehyde are found in the hospital environment at higher concentrations than those to which the general population is exposed. Their possible adverse health effects are therefore very important to those working in certain parts of hospitals and to patients whose health status may be compromised. Both compounds are irritants and can cause sensitisation. Glutaraldehyde ...


    By PPM Technology

  • Preconcentration of Cu (II) from seawater using a novel and stable phenol–formaldehyde resin

    Preconcentration of Cu (II) from seawater using a novel phenol–formaldehyde (P–F) resin was investigated. 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene-formaldehyde resin (DAHBF) was prepared by condensing 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene with formaldehyde (1:2 mole ratio) in the presence of oxalic acid as catalyst. Polychelates were obtained when the DAHBF was treated with the aqueous ...


    By IWA Publishing

  • Background Concentrations of 18 Air Toxics for North America

    ABSTRACT Of the 188 hazardous air pollutants, or 'air toxics,' identified by the U.S. Clean Air Act, 18 were targeted as the most important in a 10-city pilot study conducted in 2001 and 2002 as part of the National Air Toxics Trend Sites Program. This paper describes the pilot study. The U.S. Clean Air Act identifies 188 hazardous air pollutants (HAPs), or “air toxics,” associated with ...

  • A Method of Assessing Air Toxics Concentrations in Urban Areas Using Mobile Platform Measurements

    ABSTRACTThe objective of this paper is to demonstrate an approach to characterize the spatial variability in ambient air concentrations using mobile platform measurements. This approach may be useful for air toxics assessments in Environmental Justice applications, epidemiological studies, and environmental health risk assessments. In this study, we developed and applied a method to characterize ...

  • Measurement of indoor-outdoor carbonyls at four residential homes in Mexico City metropolitan area

    Formaldehyde, acetaldehyde, acetone, propionaldehyde and butyraldehyde were measured in indoor and outdoor air at three houses and one apartment in the Mexico city metropolitan area (MCMA). Formaldehyde presented the highest concentration in indoor and outdoor air, followed by acetone and acetaldehyde. Indoor carbonyl concentrations were higher than outdoor concentrations at all sampling sites. ...


    By Inderscience Publishers

  • Suitable solid state chemical sensor for HCHO determination

    A solid state NiO-polyaniline mixture electrode is proposed and characterised to determine formaldehyde. The influence of ionic strength is particularly significant. The response is slow, so a waiting time, optimised at 90 min is needed, thus preventing a continuous or in-flow condition determination. Some common environmental possible interfering analytes have been tested, the most interfering ...


    By Inderscience Publishers

  • German Environmental Survey IV: environmental tobacco smoke exposure of German children

    As the current extent of Environmental Tobacco Smoke (ETS) exposure of children in Germany is unknown, it was investigated in the German Environmental Survey (GerES IV) for Children from 2003 to 2006 using questionnaires and analyses of cotinine in urine and benzene and formaldehyde in indoor air. About half of the 3- to 14-year-old children in Germany live in households with at least one smoker. ...


    By Inderscience Publishers

  • Effect of three fungicides on in vitro growth of Fusarium solani and Fusarium semitectum, parasitic on Odontesthes bonariensis eggs

    An in vitro evaluation of the effect of three fungicides on the growth rate (GR) of Fusarium solani and Fusarium semitectum was performed. The tested fungicides, commonly used in fish farming, were sodium chloride (NaCl), methanol-stabilised formaldehyde (F) and malachite green (MG). Both Fusarium species were isolated from eggs of the Argentinean pejerrey Odontesthes bonariensis (Valenciennes, ...


    By Inderscience Publishers

  • Carbonyl Sampling and Analysis by HPLC

    Sampling of Carbonyls Using a Dual-Layer LpDNPH Glass Sampling Tube and HPLC Analysis with an Ascentis Express C18 Column The dual-layer LpDNPH ORBO-555 tube is an effective sampler for measuring airborne carbonyl concentration. The low background levels in the sampler allow for accurate measurements of low concentration samples or samples collected in ...


    By Sigma-Aldrich Co., LLC

  • Study of constructed wetlands effluent disinfected with ozone

    The purpose of this research was to study the disinfection of sanitary effluent from constructed wetlands, evaluating the oxidation of organic matter, the formation of formaldehyde, as well as the efficiency of total coliforms and Escherichia coli inactivation. A constant flow of ozone was applied to the batch system in 5 and 10 mg.O3 L−1 doses with contact times ...


    By IWA Publishing

  • Development of biomarkers in an integrated approach to environmental studies

    This study was conducted in a contained environment in order to develop biomarkers and to evaluate the environmental damage after a release of two different toxic substances which are widely used in industrial production. In a simulation study performed in Tor Mancina area (near Rome, Italy), two dangerous substances (formaldehyde and bromine) were tested. Chemical and physical characterisation, ...


    By Inderscience Publishers

  • Swiss blue dye sequestration by adsorption using Acacia nilotica sawdust

    Batch adsorption studies were conducted to investigate the potential of Acacia nilotica sawdust as biosorbent for removal of basic Swiss blue dye from wastewater. Sawdust was subjected to formaldehyde pretreatment (FSD) and boiling (BSD). Maximum dye removal was observed after 120 min for all conditions – FSD: 97.5% and BSD: 95.9% at pH 6, 50 mgL−1 dye ...


    By Inderscience Publishers

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