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Formaldehyde gas sensors: a review.

Chung PR, Tzeng CT, Ke MT, Lee CY - Sensors (Basel) (2013)

Bottom Line: Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems.Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production.This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

View Article: PubMed Central - PubMed

Affiliation: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan. benjamin@archilife.ncku.edu.tw

ABSTRACT
Many methods based on spectrophotometric, fluorometric, piezoresistive, amperometric or conductive measurements have been proposed for detecting the concentration of formaldehyde in air. However, conventional formaldehyde measurement systems are bulky and expensive and require the services of highly-trained operators. Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems. Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production. This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

No MeSH data available.


Related in: MedlinePlus

(a) Schematic illustration of flow injection system coupled with collection/concentration system for formaldehyde determination. (RS, reagent solution; CS and AS, carrier and absorbing solutions, respectively; P1, double-plunger pump; P2, peristaltic pump; P3, syringe pump; V1 and V2, six-way valves; V3, three-way valve; S, sample; M, mixing joint; DG, degassing unit; RC, reaction coil; D, detector; BPC, back-pressure coil; CMC, chromatomembrane cell; BPB, biporous PTFE block; PMF, porous membrane filter. (A) Introduction of absorbing solution into FIA system; (B) air sampling); (b) Variation of peak area and peak height with air sample volume [24].
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f2-sensors-13-04468: (a) Schematic illustration of flow injection system coupled with collection/concentration system for formaldehyde determination. (RS, reagent solution; CS and AS, carrier and absorbing solutions, respectively; P1, double-plunger pump; P2, peristaltic pump; P3, syringe pump; V1 and V2, six-way valves; V3, three-way valve; S, sample; M, mixing joint; DG, degassing unit; RC, reaction coil; D, detector; BPC, back-pressure coil; CMC, chromatomembrane cell; BPB, biporous PTFE block; PMF, porous membrane filter. (A) Introduction of absorbing solution into FIA system; (B) air sampling); (b) Variation of peak area and peak height with air sample volume [24].

Mentions: Sritharathikhun et al. [24] presented a method for determining trace amounts of formaldehyde in air by coupling a three-hole chromatomembrane cell (CMC) and a flow injection analysis (FIA) system. As shown in Figure 2(a), the CMC was used to collect and concentrate trace amounts of gaseous formaldehyde in water and the resulting solution was then introduced into the carrier stream of the FIA system.


Formaldehyde gas sensors: a review.

Chung PR, Tzeng CT, Ke MT, Lee CY - Sensors (Basel) (2013)

(a) Schematic illustration of flow injection system coupled with collection/concentration system for formaldehyde determination. (RS, reagent solution; CS and AS, carrier and absorbing solutions, respectively; P1, double-plunger pump; P2, peristaltic pump; P3, syringe pump; V1 and V2, six-way valves; V3, three-way valve; S, sample; M, mixing joint; DG, degassing unit; RC, reaction coil; D, detector; BPC, back-pressure coil; CMC, chromatomembrane cell; BPB, biporous PTFE block; PMF, porous membrane filter. (A) Introduction of absorbing solution into FIA system; (B) air sampling); (b) Variation of peak area and peak height with air sample volume [24].
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3673094&req=5

f2-sensors-13-04468: (a) Schematic illustration of flow injection system coupled with collection/concentration system for formaldehyde determination. (RS, reagent solution; CS and AS, carrier and absorbing solutions, respectively; P1, double-plunger pump; P2, peristaltic pump; P3, syringe pump; V1 and V2, six-way valves; V3, three-way valve; S, sample; M, mixing joint; DG, degassing unit; RC, reaction coil; D, detector; BPC, back-pressure coil; CMC, chromatomembrane cell; BPB, biporous PTFE block; PMF, porous membrane filter. (A) Introduction of absorbing solution into FIA system; (B) air sampling); (b) Variation of peak area and peak height with air sample volume [24].
Mentions: Sritharathikhun et al. [24] presented a method for determining trace amounts of formaldehyde in air by coupling a three-hole chromatomembrane cell (CMC) and a flow injection analysis (FIA) system. As shown in Figure 2(a), the CMC was used to collect and concentrate trace amounts of gaseous formaldehyde in water and the resulting solution was then introduced into the carrier stream of the FIA system.

Bottom Line: Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems.Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production.This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

View Article: PubMed Central - PubMed

Affiliation: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan. benjamin@archilife.ncku.edu.tw

ABSTRACT
Many methods based on spectrophotometric, fluorometric, piezoresistive, amperometric or conductive measurements have been proposed for detecting the concentration of formaldehyde in air. However, conventional formaldehyde measurement systems are bulky and expensive and require the services of highly-trained operators. Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems. Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production. This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

No MeSH data available.


Related in: MedlinePlus