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

Teerasong, Saowapak; Amornthammarong, Natchanon; Grudpan, Kate; Teshima, Norio; Sakai, Tadao; Nacapricha, Duangjai; Ratanawimarnwong, Nuanlaor

doi:10.2116/analsci.26.629

Cited by 14 publications

(8 citation statements)

References 22 publications

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“…This technique can be applied on the determination of formaldehyde in beverage and dried food samples with LOD of 0.04 ng mL -1 (Zhao and Zhang 2009). In 2010, Teerasong et al (2010) developed a hybrid flow injection analysis (FIA) system for the detection of formaldehyde in food (Teerasong et al 2010) 5) (Wang et al 2007). Reference cards are prepared by mixing a series of standard formaldehyde solutions with an acetylacetone solution.…”

Section: 2preservatives: Formaldehydementioning

confidence: 99%

Rapid testing methods for food contaminants and toxicants

Chiou

Leung

Lee

et al. 2015

Journal of Integrative Agriculture

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Food Safety is one of the major concerns in every country regardless of the economic and social development. The frequent occurrence of food scandals in the world has led the Chinese government to implement several strategies to fortify the food supply system to a high food safety standard. This relies heavily on laboratory testing services but conventional methods for detection of food contaminants and toxicants are limited by sophisticated sample preparation procedures, long analysis time, large instruments and professional personnel to meet the increasing demands. In this review, we have incorporated most of the current and potential rapid detection methods for many notorious food contaminants and toxicants including microbial agents, toxic ions, pesticides, veterinary drugs and preservatives, as well as detection of genetically modified food genes and adulterated edible oil. Development of rapid, accurate, easyto-use and affordable testing methods could urge food handlers and the public to actively screen for food contaminants and toxicants instead of passively relying on monitoring by the government examination facility. This review also provides several recommendations including how to encourage the public to engage in the food safety management system and provide optimal education and financial assistance that may improve the current Chinese food safety control system.

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Section: 2preservatives: Formaldehydementioning

confidence: 99%

Rapid testing methods for food contaminants and toxicants

Chiou

Leung

Lee

et al. 2015

Journal of Integrative Agriculture

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“…On-line scrubbing into an aqueous collector and an appropriate on-line aqueous phase fluorogenic reaction are used, e.g., for H 2 S (135, 136), HCHO (137,138), NH 3 (139), and NO 2 (140). Similar measurements have been made for NH 4 + in seawater (141)(142)(143) or HCHO in foods (144), etc. In many cases, multiple LEDs, with or without interference filters and/or ball lenses for focusing, can be arranged around the flow tube, and an integral photodiode-operational amplifier detector, with or without additional amplification, provides sufficient sensitivity for the end application.…”

Section: Macroscale Flow-through Fluorescence Detectors and Sensorsmentioning

confidence: 99%

Light-Emitting Diodes for Analytical Chemistry

Macka

Piasecki

Dasgupta

2014

Annual Rev. Anal. Chem.

114

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Light-emitting diodes (LEDs) are playing increasingly important roles in analytical chemistry, from the final analysis stage to photoreactors for analyte conversion to actual fabrication of and incorporation in microdevices for analytical use. The extremely fast turn-on/off rates of LEDs have made possible simple approaches to fluorescence lifetime measurement. Although they are increasingly being used as detectors, their wavelength selectivity as detectors has rarely been exploited. From their first proposed use for absorbance measurement in 1970, LEDs have been used in analytical chemistry in too many ways to make a comprehensive review possible. Hence, we critically review here the more recent literature on their use in optical detection and measurement systems. Cloudy as our crystal ball may be, we express our views on the future applications of LEDs in analytical chemistry: The horizon will certainly become wider as LEDs in the deep UV with sufficient intensity become available.

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“…To date, HCHO production from pesticides has not been investigated.The aim of this research was to develop a method for simultaneously monitoring HCHO and O 3 . To detect HCHO and O 3 , we applied the Hantzsch reaction [17,18] and indigotrisulfonate (ITS) discoloration [19,20], respectively( Fig. 2) The ozone decomposition of ITS results in a disruption of its π-electron conjugated system and the elimination of the system's absorption in the red region.…”

Section: Introductionmentioning

confidence: 99%