Compact detectors made of paired LEDs for photometric and fluorometric measurements on paper

Fiedoruk-Pogrebniak, Marta; Granica, Mateusz; Koncki, Robert

doi:10.1016/j.talanta.2017.08.091

Cited by 29 publications

(15 citation statements)

References 38 publications

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“…The potential applicability to on-site analyses would make spectrometric measurements using the reagent-deposited pieces of paper more attractive for coupling with miniaturized photometric detectors. 29,33,34…”

Section: Resultsmentioning

confidence: 99%

Characterization of Pieces of Paper That Form Reagent Containers for Use as Portable Analytical Devices

Buking¹,

Suedomi

Nacapricha³

et al. 2019

ACS Omega

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Reagent-deposited pieces of paper were characterized by the use of a compact conductometer, a compact pH sensor, and a conventional spectrophotometer to assess their suitability for use as reagent containers. The pieces of paper were fabricated by wax printing to form a limited hydrophilic area to which a consistent volume of an aqueous reagent could be added. The pieces of paper without the reagent increased the conductivity of water gradually because of the release of sodium salts, whereas pH of NaOH decreased because of the acidity of the functional groups in the paper. Three reagents, sulfamic acid as an acid, Na2CO3 as a base, and BaCl2 as a metal salt, were deposited on the pieces of paper to evaluate their ability to release from the pieces of paper. Sulfamic acid and Na2CO3 were released in quantities of 58 and 73% into water after 420 s, whereas 100% of BaCl2 was released after 480 s. The conductometric titrations of NaOH, HCl, and Na2SO4, and the spectrophotometry of Fe2+ were examined using the pieces of paper that contained sulfamic acid, Na2CO3, BaCl2, and 1,10-phenanthroline. Titrations using the pieces of paper suggested that the reagents were quantitatively released into the titrant, which resulted in a linear relationship between the endpoints and the equivalent points. In 120 s of soaking time, 60–70% of the reagents were released. The spectrophotometric measurements of Fe2+ indicated that when an excess amount of the reagents was deposited onto the pieces of paper, they nonetheless sufficiently fulfilled the role of a reagent container.

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Section: Resultsmentioning

confidence: 99%

Characterization of Pieces of Paper That Form Reagent Containers for Use as Portable Analytical Devices

Buking¹,

Suedomi

Nacapricha³

et al. 2019

ACS Omega

View full text Add to dashboard Cite

show abstract

“…In contrast, fluorometric analysis provides a fast and low‐cost alternative for determination of metal ions in solution as well as in live cells and tissues . With the use of selective fluorometric probes for metal ions, coupled with fluorimetric detection, these analyses can be performed in an express, non‐destructive manner using portable devices . Another advantage of fluorometric techniques is their adaptability to the direct flow analysis format .…”

Section: Introductionmentioning

confidence: 99%

Modular Assembly of Tunable Fluorescent Chemosensors Selective for Pb²⁺ and Cu²⁺ Metal Ions via the Multicomponent Castagnoli‐Cushman Reaction

et al. 2019

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The multicomponent Castagnoli‐Cushman reaction followed by post‐condensational modifications allowed for a flexible, modular construction of fluorescent chemosensor compounds. When tested against a panel of fourteen metal ions, one of the eight compounds investigated in this work was found to selectively respond to Cu2+ ions by fluorescence quenching (thus being a “turn‐off” chemosensor for this metal). Another compound was found to produce fluorescence increase in response to Pb2+ ions. Interestingly, the sensitivity of this “turn‐on” chemosensor to lead(II) ions was unaffected by the presence of a large excess of other metals. Analysis of the structure‐sensing property relationships of these sensors allowed developing a general understanding of the factors influencing the chemosensor properties. All of the critical structural factors employed in the chemosensor design were found to be important for the metal sensing and selectivity. These findings will allow designing next‐generation chemosensors based on the same modular construction approach in the future.

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“…μPADs have a number of merits, such as ease of use, low volume, biodegradability, portability, disposability, and good biocompatibility [2]. In recent years, a variety of analytical methods have been reported to be integrated with μPADs, including as electrochemistry [3], colorimetry [4], fluorometry [5], surface plasmon resonance (SPR) [6], chemiluminescence [7], electrophoresis [8], chromatography [9], and mass spectrometry (MS) [10]. Among these methods, colorimetry is most attractive due to its instrumental advantages (portability and capacity of operating analysis via scanner, camera, or smartphone).…”

Section: Introductionmentioning

confidence: 99%

New Single-Layered Paper-Based Microfluidic Devices for the Analysis of Nitrite and Glucose Built via Deposition of Adhesive Tape

Deng

Yang

2019

Sensors

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A simple, low-cost technique has been developed for the rapid fabrication of single-layered paper-based microfluidic devices (μPADs). This technique, for the first time, made use of the deposition of patterned adhesive tape into the filter paper to construct hydrophobic barriers, with the help of toluene. Unlike other reported multi-layered μPADs that merely made use of adhesive tape as a separate layer for sealing or fluid flow controlling, the patterned adhesive tape was simultaneously dissolved and penetrated into the filter paper, which resulted in the successful transfer of the pattern from the tape to the filter paper. To demonstrate the effectiveness of this approach, nitrite and glucose were individually measured; detection limits as low as 0.015 ± 0.004 mM and 0.022 ± 0.006 mM were reported for nitrite and glucose, respectively. Multiplexed analysis of both analytes was also carried out with respective detection limits of 0.048 ± 0.005 mM and 0.025 ± 0.006 mM for nitrite and glucose. The application of the method was demonstrated by measuring nitrite and glucose in spiked artificial urine samples and satisfied recovery results were obtained.

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Compact detectors made of paired LEDs for photometric and fluorometric measurements on paper

Cited by 29 publications

References 38 publications

Characterization of Pieces of Paper That Form Reagent Containers for Use as Portable Analytical Devices

Characterization of Pieces of Paper That Form Reagent Containers for Use as Portable Analytical Devices

Modular Assembly of Tunable Fluorescent Chemosensors Selective for Pb²⁺ and Cu²⁺ Metal Ions via the Multicomponent Castagnoli‐Cushman Reaction

New Single-Layered Paper-Based Microfluidic Devices for the Analysis of Nitrite and Glucose Built via Deposition of Adhesive Tape

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Compact detectors made of paired LEDs for photometric and fluorometric measurements on paper

Cited by 29 publications

References 38 publications

Characterization of Pieces of Paper That Form Reagent Containers for Use as Portable Analytical Devices

Characterization of Pieces of Paper That Form Reagent Containers for Use as Portable Analytical Devices

Modular Assembly of Tunable Fluorescent Chemosensors Selective for Pb2+ and Cu2+ Metal Ions via the Multicomponent Castagnoli‐Cushman Reaction

New Single-Layered Paper-Based Microfluidic Devices for the Analysis of Nitrite and Glucose Built via Deposition of Adhesive Tape

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Product

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About

Modular Assembly of Tunable Fluorescent Chemosensors Selective for Pb²⁺ and Cu²⁺ Metal Ions via the Multicomponent Castagnoli‐Cushman Reaction