Analytical validation using a gas mixing system for the determination of gaseous formaldehyde

Souza, Murilo de Oliveira; Sánchez, Benigno; Fuentes, Marta; Gilaranz, Juan; Canela, María Cristina

doi:10.1039/d0ay01363c

Cited by 11 publications

(4 citation statements)

References 54 publications

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“…As such, an uncertainty of 20 % is assumed for TO-11A observations in this work. We note that this may not account for any biases caused by interfering species such as NO 2 or issues brought on by variable sample flow rates or ambient RH (Karst et al, 1993;Herrington and Hays, 2012;Ho et al, 2014;Souza et al, 2020).…”

Section: Dnph (To-11a)mentioning

confidence: 98%

Evaluation of Aeris mid-infrared absorption (MIRA), Picarro CRDS (cavity ring-down spectroscopy) G2307, and dinitrophenylhydrazine (DNPH)-based sampling for long-term formaldehyde monitoring efforts

Mouat,

Siegel,

Kaiser

2024

Atmos. Meas. Tech.

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Abstract. Current formaldehyde (HCHO) measurement networks rely on the TO-11A offline chemical derivatization technique, which can be resource intensive and limited in temporal resolution. In this work, we evaluate the field performance of three new commercial instruments for continuous in situ formaldehyde monitoring: the Picarro cavity ring-down spectroscopy G2307 gas concentration analyzer and Aeris Technologies' mid-infrared absorption Pico and Ultra gas analyzers. All instruments require regular drift correction, which is accomplished through instrument zeroing using dinitrophenylhydrazine (DNPH)-coated cartridges, Drierite, or molecular sieves, while heated Hopcalite failed to remove all incoming HCHO. We show that a modified precision estimate accounting for regular instrument zeroing results in values of 0.09, 0.20, and 0.22 ppb at a 20 min integration time for the G2307, Ultra, and Pico, respectively. After applying standard addition and dynamic dilution calibrations, all instruments agreed within 13 % and were well correlated with each other (all r ≥ 0.90). TO-11A HCHO observations resulted in a normalized mean bias of −58 % compared to co-located Picarro G2307 measurements (r=0.62, slope = 0.38, int = 0.07 ppb HCHO). Using a 6-month deployment period in the Atlanta metropolitan area, we determined that the Picarro G2307 and Aeris units have sufficient accuracy and precision to capture the Atlanta spatial HCHO gradient. We find that midday HCHO concentrations have decreased by 22.3 % since 1999 in the city's urban core, and DNPH measurements at a nearby Photochemical Assessment Monitoring Station (PAMS) site show a greater decrease of 53 %.

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Section: Dnph (To-11a)mentioning

confidence: 98%

Evaluation of Aeris mid-infrared absorption (MIRA), Picarro CRDS (cavity ring-down spectroscopy) G2307, and dinitrophenylhydrazine (DNPH)-based sampling for long-term formaldehyde monitoring efforts

Mouat,

Siegel,

Kaiser

2024

Atmos. Meas. Tech.

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“…Tennis tower 6 Units (401,402,701,702,1201,1202) Bermuda views 6 Units (303,304,603,604,1003,1004) Frontiers in Built Environment frontiersin.org from ozone (Souza et al, 2020). A 2,4-DNPH (dinitrophenylhydrazine) cartridge coated with 350 mg of silica was also utilized for HCHO sampling (Zou et al, 2020).…”

Section: Target Buildings Target Unitsmentioning

confidence: 99%

Enhancing indoor air quality and sustainable living in newly constructed apartments: insights from Dubai

Jung,

Abdelaziz Mahmoud,

Alqassimi

2023

Front. Built Environ.

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This research paper examines Indoor Air Quality (IAQ) conditions in newly constructed apartments in Dubai to be more sustainable for residents to have healthier lifestyles. Enhanced airtightness and chemical-laden materials contribute to IAQ pollution in these buildings. The study aims to assess pollutant concentrations and variations based on building height. Measurements were conducted in 12 apartment units using the WHO’s IAQ assessment methodology. Most pollutants were within limits, but TVOC exceeded the Dubai Municipality’s standard, measuring at 2634.4 μg/m³, approximately nine times higher than the standard. HCHO (163.4 μg/m³) and toluene (551.4 μg/m³) were identified as significant pollutants with potential health effects. Analysis of pollutant concentrations based on building height revealed higher TVOC levels in upper areas, with 2,828 μg/m³ in the upper area compared to 2,443 μg/m³ in the lower area, indicating more severe indoor air pollution in Ethylbenzene and styrene also highest in upper areas, with ethylbenzene at 122 μg/m³ and styrene at 82 μg/m³ in the upper area, potentially due to elevated sources. Toluene and xylene concentrations were elevated in the middle area, with toluene at 574 μg/m³ and xylene at 321 μg/m³, likely influenced by materials and occupant activities. Benzene concentrations were consistent across all heights at 2.94 μg/m³, suggesting a common source. HCHO concentrations were relatively consistent but slightly higher in the middle and upper areas, with 171 μg/m³ in both, likely influenced by ventilation and emissions. While average pollutant concentrations met WHO standards, many units exceeded recommended limits, requiring targeted interventions. The study highlights the importance of addressing IAQ concerns and implementing strategies to reduce indoor air pollutants and improve ventilation. These findings contribute to IAQ knowledge in Dubai’s residential buildings, guiding policymakers, architects, and developers in effective policies and guidelines. Further research on seasonal variations and other IAQ factors is recommended for better understanding and long-term monitoring. Prioritizing IAQ in newly constructed apartments is crucial for healthier living in Dubai. The residential building sector can protect residents’ health by implementing appropriate measures while delivering upscale living experiences.

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“…(MEMIC et al, 2014). Sendo assim, o entendimento da composição química dos chás da Camellia sinensis permite compreender seus benefícios e malefícios à saúde, algo que é de grande interesse científico, econômico e social (DERUN, 2014;PRÜSS-USTÜN et al, 2016;SOUZA;MORASSUTI;DEUS, 2018;TOMASZEWSKA et al, 2016). Desta forma, o objetivo deste trabalho foi determinar as concentrações de As, Cd, Cr, Cu, Pb e Zn por espectrometria de emissão óptica com plasma acoplado indutivamente (ICP OES) após decomposição ácida em amostras de chá preto da planta Camellia sinensis.…”

Section: Determination Ofunclassified

“…A medição dos analitos (As, Cd, Cr, Cu, Pb e Zn) por ICP OES na amostra de chá (amostra S1) foi realizada em triplicata para avaliar a precisão do equipamento por meio do desvio-padrão (SD) e do desvio-padrão relativo (RSD). Os limites de detecção (LD) e de quantificação (LQ) foram calculados de acordo com a União Internacional de Química Pura e Aplicada (IUPAC) por meio das seguintes equações (SOUZA et al, 2020):…”

Section: Características De Desempenhounclassified

Determinación de As, Cd, Cr, Cu, Pb y Zn en tés negros (Camellia sinensis L.) vendidos en supermercados en Campos dos Goytacazes, Brasil

Vieira,

Venial,

Silva

et al. 2023

Revista Vértices

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A Camellia sinensis L. é um arbusto da família das Theaceae. A partir das suas folhas é produzido um chá que é a segunda bebida não alcoólica mais consumida no mundo. O chá dessa planta pode trazer vários benefícios à saúde, entretanto alguns elementos presentes nas folhas da Camellia sinensis L. são potencialmente tóxicos como, por exemplo, o As, Cd e Pb; uma vez que estão entre as dez substâncias químicas de maiores riscos à saúde. Desta forma, o objetivo deste trabalho foi determinar as concentrações de As, Cd, Cr, Cu, Pb e Zn por espectrometria de emissão óptica com plasma acoplado indutivamente (ICP OES) após decomposição ácida de amostras comerciais de chá preto da planta Camellia sinensis L. adquiridas em supermercados de Campos dos Goytacazes/RJ. Os limites de detecção para os elementos foram de 0,5 mg kg−1 para As; 0,003 mg kg−1 para Cd; 0,02 mg kg−1 para Cr; 1,2 mg kg−1 para Cu; 0,09 mg kg−1 para Pb e 0,04 mg kg−1 para Zn. As concentrações encontradas dos elementos potencialmente tóxicos Cd e Pb nos chás pretos da Camellia sinensis L. estão abaixo das concentrações estabelecidas pela ANVISA (0,60 mg kg-1 e 0,40 mg kg-1, respectivamente).

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Analytical validation using a gas mixing system for the determination of gaseous formaldehyde

Abstract: Formaldehyde levels in the atmosphere is a concern in the indoor and outdoor air and many methods for determining this compound have been developed. The use of 2,4-dinitrophenylhydrazine (DNPH) for...

Cited by 11 publications

References 54 publications

Evaluation of Aeris mid-infrared absorption (MIRA), Picarro CRDS (cavity ring-down spectroscopy) G2307, and dinitrophenylhydrazine (DNPH)-based sampling for long-term formaldehyde monitoring efforts

Evaluation of Aeris mid-infrared absorption (MIRA), Picarro CRDS (cavity ring-down spectroscopy) G2307, and dinitrophenylhydrazine (DNPH)-based sampling for long-term formaldehyde monitoring efforts

Enhancing indoor air quality and sustainable living in newly constructed apartments: insights from Dubai

Determinación de As, Cd, Cr, Cu, Pb y Zn en tés negros (Camellia sinensis L.) vendidos en supermercados en Campos dos Goytacazes, Brasil

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