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Micro-multiphase laminar flows for the extraction and detection of carbaryl derivative [An article from: Analytica Chimica Acta]
Book Details
PublisherElsevier
ISBN / ASINB000RR70OA
ISBN-13978B000RR70O1
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A new solvent extraction concentration method utilizing microchip technology has been developed. As an important application of this system, carbaryl determination with thermal lens microscope detection was demonstrated. Carbaryl pesticide was hydrolyzed in an alkaline medium to 1-naphthol, was coupled with diazotized trimethylaniline, and, then, was extracted to toluene as a colored azo dye. Two microchips with modified complex-shape microchannels were used for mixing, reaction, extraction, and detection. A thermal lens microscope was used for the detection of the colored product. Optimum conditions for aqueous phase and organic phase flow rates inside the microchannels were identified. The calibration line indicated good linearity for concentrations of 3.4x10^-^7 to 3.5x10^-^6M and a detection limit of 7x10^-^8M was obtained. This limit of detection is at least two orders less than LODs for conventional spectrophotometric methods. The results with the present integrated system suggested there was a good potential for implementing an on-site carbaryl analysis system.
Description:
A new solvent extraction concentration method utilizing microchip technology has been developed. As an important application of this system, carbaryl determination with thermal lens microscope detection was demonstrated. Carbaryl pesticide was hydrolyzed in an alkaline medium to 1-naphthol, was coupled with diazotized trimethylaniline, and, then, was extracted to toluene as a colored azo dye. Two microchips with modified complex-shape microchannels were used for mixing, reaction, extraction, and detection. A thermal lens microscope was used for the detection of the colored product. Optimum conditions for aqueous phase and organic phase flow rates inside the microchannels were identified. The calibration line indicated good linearity for concentrations of 3.4x10^-^7 to 3.5x10^-^6M and a detection limit of 7x10^-^8M was obtained. This limit of detection is at least two orders less than LODs for conventional spectrophotometric methods. The results with the present integrated system suggested there was a good potential for implementing an on-site carbaryl analysis system.
