Development of formaldehyde sensing element using porous glass impregnated with β-diketone

Maruo, Yasuko Yamada; Nakamura, Jiro; Uchiyama, Masahiro

doi:10.1016/j.talanta.2007.08.017

Cited by 49 publications

(41 citation statements)

References 11 publications

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“…The sensitivity in the linear region at low concentrations (0 -2 ppm) is about 1.4 mA/ppm (see also Table 1). The stability is somewhat poor declining to 57% of the initial value at 0.5 ppm within 3 h. The detection limit (S/N ¼ 3) was calculated to 0.03 ppm, which is below the value of 0.08 ppm recommended by the WHO for safe short exposure averaged over 30 min [25].…”

Section: Sensor With Au Gas Diffusion Electrodementioning

confidence: 70%

Gas Diffusion Electrodes for Use in an Amperometric Enzyme Biosensor

2008

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The preparation of gas diffusion electrodes and their use in an amperometric enzyme biosensor for the direct detection of a gaseous analyte is described. The gas diffusion electrodes are prepared by covering a PTFE membrane (thickness 250 mm, pore size 2 mm, porosity 35%) with gold, platinum, or a graphite/PTFE mixture. Gold and platinum are deposited by e-beam sputtering, whereas the graphite/PTFE layer is prepared by vacuum filtration of a respective aqueous suspension. These gas diffusion electrodes are exemplarily implemented as working electrodes in an amperometric biosensor for gaseous formaldehyde containing NAD-dependent formaldehyde dehydrogenase from P. putida [EC. 1.2.1.46] as enzyme and 1,2-naphthoquinone-4-sulfonic acid as electrochemical mediator. The resulting sensors are compared with regard to background current, signal noise, linear range, sensitivity, and detection limit. In this respect, sensors with gold or graphite/PTFE covered membranes outclass ones with platinum for this particular analyte and sensor configuration.

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Section: Sensor With Au Gas Diffusion Electrodementioning

confidence: 70%

Gas Diffusion Electrodes for Use in an Amperometric Enzyme Biosensor

2008

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“…The sensor element was prepared using the method reported previously [13], changing the quantity of 1-phenyl-1,3-butanedione (Kanto Chemical, Japan, Guaranteed reagent for JIS) to 0.471 g The method detects the reaction of formaldehyde with 1-phenyl-1,3-butanedione and ammonium ions…”

Section: Determining Formaldehyde Emitted From Textiles Using a Sensomentioning

confidence: 99%

“…The authors previously developed a passive method that uses a porous glass sensor element impregnated with β-diketone, which can measure formaldehyde in indoor air [13][14][15]. In this report, we apply the sensor element to a screening method for on-site measurement of formaldehyde in textiles.…”

Section: Introductionmentioning

confidence: 99%

A screening method for detecting formaldehyde emitted from textile products

Kawakami

Maruo

Nakagawa³

et al. 2015

Measurement

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Formaldehyde is widely used to improve textile quality, but it is categorized as a potential carcinogen in humans. The concentration of formaldehyde emitted from textile products therefore has implications for public health. The standard method uses acetylacetone for determining formaldehyde extracted from textile products, but requires a water solution and the use of an analyzer. In this study, we present a method for screening textile-emitted formaldehyde via a porous glass sensor that we previously developed. Our method is suitable for on-site screening, whereas the commonly used method is not. The glass sensor was used to measure formaldehyde concentrations emitted from several kinds of textile products. The results showed good agreement (coefficient 0.92) with those of the acetylacetone method. Moreover, we estimate the effects of temperature, and suggest a formula to calculate concentration including temperature correction.

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“…1) was obtained [1], [20]- [22]. Colorimetric reagents consisted of acetylacetone, ammonium acetate, and acetic acid were entrapped within polymer matrix.…”

Section: A Colorimetric Test Of Formaldehydementioning

confidence: 99%