Measurement of gaseous and aqueous trace formaldehyde

Li, Jianzhong; Dasgupta, Purnendu Κ.; Luke, Winston T.

doi:10.1016/j.aca.2004.09.087

Cited by 63 publications

(29 citation statements)

References 77 publications

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“…We have developed methods to measure various gases, e.g., SO 2 [12][13][14], H 2 O 2 [14,15], HCHO [14][15][16], NH 3 [17,18], HONO [19], acetone [20], etc. Many others have developed similar approaches since; there are several reviews [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

A permeable membrane capacitance sensor for ionogenic gases

Tian

Dasgupta

2009

Analytica Chimica Acta

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Section: Introductionmentioning

confidence: 99%

A permeable membrane capacitance sensor for ionogenic gases

Tian

Dasgupta

2009

Analytica Chimica Acta

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“…In flow injection analysis (FIA), the Hantzsch reaction has been applied to the analysis of air, [14][15][16][17] 15,18 have been employed. Amongst these, 2,4-pentanedione is recommended as the best reagent due to its reactivity at lower temperature and low sensitivity to interferences.…”

Section: Introductionmentioning

confidence: 99%

“…Amongst these, 2,4-pentanedione is recommended as the best reagent due to its reactivity at lower temperature and low sensitivity to interferences. 16 In a recent flow system, 2,4-pentanedione and ammonium acetate solutions were arranged to mix together in one of the syringes prior to a reaction with HCHO. 17 This flow system for the analysis of HCHO in air is based on the concept of a hybrid flow analyzer.…”

Section: Introductionmentioning

confidence: 99%

A Multiple Processing Hybrid Flow System for Analysis of Formaldehyde Contamination in Food

et al. 2010

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Experimental Reagents and chemicalsAll chemicals used were of analytical reagent grade. Deionized-distilled water used throughout the work was obtained from an EASYpure II system (Branstead, USA).Ammonium acetate solution (2.0 M) was prepared by This work proposes a flow system suitable for the rapid screening of formaldehyde contaminated in food. The system is based on the concept of a flow analyzer with a Hantzsch reaction. An operating procedure was developed for multiple tasking and high sample throughput. This resulted in a significant sample throughput of 51 samples h -1 . Under the optimized conditions, linear calibration from 10 to 100 μM was obtained. The system gave a limit of detection and a limit of quantitation of 0.06 and 0.10 mg kg -1 , respectively. The system was successfully applied to re-hydrated dry squids, vegetables and mushrooms.

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“…Both of them can offer excellent sensitivity for the detection of formaldehyde, though such reactions require high temperature for the reaction, and furthermore, the CHD methods can suffer from positive interference from H 2 O 2 [17]. Aiming at developing sensitive methods of analysis for formaldehyde, flow injection analysis (FIA) has been frequently used.…”

Section: Introductionmentioning

confidence: 99%

Flow-injection spectrofluorometric determination of trace amounts of formaldehyde in water after derivatization with acetoacetanilide

Oshima

Motomizu

2007

Talanta

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A novel fluorophotometric method for formaldehyde determination in environmental waters was developed: the method does not require any enrichment procedures. A flow injection analysis method for the spectrofluorometric determination of formaldehyde in waters, which is based on the reaction of formaldehyde with acetoacetanilide and ammonia, is proposed. The proposed method shows a good linearity from 0.50 to 40 x 10 -7 M, and the limit of detection (LOD) of 3 x 10 -9 M (0.09 ppb) is achievable. The sample throughput is 15 h -1 . One of the main advantages in the proposed method is that the reaction can be carried out at room temperature without any heating system. The effect of 1 various interferences possibly present in the real water samples was investigated. Most cations and anions, as well as organic compounds, do not interfere with the determination of formaldehyde in environmental water samples. The proposed method is very simple, rapid, less expensive, and highly sensitive, and can be applied to the environmental water samples, such as rain, tap water and river water, at low concentration levels without any enrichment procedure.

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Measurement of gaseous and aqueous trace formaldehyde

Cited by 63 publications

References 77 publications

A permeable membrane capacitance sensor for ionogenic gases

A permeable membrane capacitance sensor for ionogenic gases

A Multiple Processing Hybrid Flow System for Analysis of Formaldehyde Contamination in Food

Flow-injection spectrofluorometric determination of trace amounts of formaldehyde in water after derivatization with acetoacetanilide

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