Visual Colorimetric Formaldehyde Screening Analysis for Indoor Air

Matthews, T.G.; Howell, Timothy

doi:10.1080/00022470.1981.10465344

Cited by 24 publications

(8 citation statements)

References 2 publications

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“…In this experiment, to determine formaldehyde residues and formaldehyde degradation, spectrophotometer method (Dr-5000, HACH model) was used in accordance with 8110 colorimetric method with a visible light detector operating at a wavelength of 630 nm [20].…”

Section: Analysis Methodsmentioning

confidence: 99%

Application of enhanced nZnO photocatalytic process with ultrasonic wave in formaldehyde degradation from aqueous solution

Amin

Teimouri

Sadani

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThis study was performed to evaluate formaldehyde degradation ratio in a batch reactor. For investigation of the synergism effect, formaldehyde degradation by each process (UV photolysis, ZnO catalyst, ultrasonic wave) was tested. In the next step, the influence of important operational parameters, such as pH of the solution (3-8), initial CH 2 O concentration (20-100 mg/l), dosage of nZnO (10-60 mg/l), ultrasonic wave power (40-150 W), and reaction time (10-60 min) was investigated. Ultrasonic wave process could slightly degrade CH 2 O and had a partial effect as synergism on formaldehyde degradation. Maximum formaldehyde removal ratio occurred with a nZnO dosage of 60 mg/l, pH of the solution of 8, ultrasonic wave power of 40 W, and initial formaldehyde concentration of 50 mg/l with a contact time of 30 min (78%). A comparison of the reaction orders of kinetic studies showed that formaldehyde degradation was in accordance with pseudo-second-order reaction. It could be found that the sonophotocatalytic process may be recommended for the treatment of solutions containing low formaldehyde concentrations.

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Section: Analysis Methodsmentioning

confidence: 99%

Application of enhanced nZnO photocatalytic process with ultrasonic wave in formaldehyde degradation from aqueous solution

Amin

Teimouri

Sadani

et al. 2016

Desalination and Water Treatment

View full text Add to dashboard Cite

show abstract

“…A total gas pressure meter measured total gas pressure (mmHg or % saturation), delta P (TGP‐BP), as well as barometric pressure (BP) (mmHg), and temperature (degrees °C) ( PT4 Tracker Total Gas Pressure (TGP) Meter, Eagar Inc., USA ). Finally, ammonia, nitrite, nitrate, formaldehyde, bromide and chlorite concentrations were measured using a spectrophotometer ( HACH DR5000, USA ) by the Nessler, diazotization, cadmium reduction, MBTH (adapted from Matthews & Howell ), DPD and mercuric thiocyanate methods respectively. For each of the mentioned parameters, the threshold limits were specified based on a literature review by this study's authors.…”

Section: Methodsmentioning

confidence: 99%

Land-based growth of Atlantic salmon (Salmo salar) and consumers’ acceptance

et al. 2017

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Atlantic salmon (Salmo salar) is currently the highest valued species grown in Europe. The industry has been on the frontline of public concerns regarding sustainability which has increased the use of recirculating aquaculture systems (RAS). Salmon has changed from a luxury product to global commodity. Nevertheless, food products need to meet consumers demand for the industry to be successful. Descriptive sensory tests present a sophisticated tool for the comparison of product prototypes to understand consumer responses in relation to sensory attributes. Aquaculture is being promoted in the Basque region with the aim of creating a sustainable and complementary economic activity to the fishing and seafood sectors. Here, RAS and salmon have been prioritized as a potential technology and species respectively. Both salmon's growth and a hedonic evaluation of the final product's consumer acceptance and purchasing intention were studied. One thousand five hundred salmon individuals were grown for 497 days at two different thermal regimes in two pilot-scale RAS units using partial reuse water recirculation systems. Growth rates were significantly different for both temperature regimes during the second summer season; some compensatory growth patterns were observed that followed the timing of the natural thermal regime. No significant differences were observed at sensorial level between fillet samples from the present study and salmon from Denmark. Consumer's high level of acceptance and positive product purchasing intention reflect the possibility of locally marketing RAS grown salmon. This study refers to the first technical attempt at salmon in land-based aquaculture systems in northern Spain.

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“…An evaluation of the existing analytical methods in 1981 indicated that substantial problems involving calibration, sampling, or method of analysis existed with most of the methods [99]. Because of current interest concerning formaldehyde as an indoor air pollutant, recent studies have been conducted to improve the reliability of test methods [101][102][103][104][105]. The methods may be generally classified as active whereby air is pumped through a sampling medium such as water-reagent solution to collect the formaldehyde, or passive whereby the formaldehyde is collected using a dosimeter.…”

Section: Formaldehyde Measurementmentioning

confidence: 99%

Urea-formaldehyde foam insulations :

Rossiter¹

1985

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Visual Colorimetric Formaldehyde Screening Analysis for Indoor Air

Cited by 24 publications

References 2 publications

Application of enhanced nZnO photocatalytic process with ultrasonic wave in formaldehyde degradation from aqueous solution

Application of enhanced nZnO photocatalytic process with ultrasonic wave in formaldehyde degradation from aqueous solution

Land-based growth of Atlantic salmon (Salmo salar) and consumers’ acceptance

Urea-formaldehyde foam insulations :

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