Use of polyurethane foam and 3-hydroxy-7,8-benzo-1,2,3,4-tetrahydroquinoline for determination of nitrite by diffuse reflectance spectroscopy and colorimetry

Apyari, V. V.; Дмитриенко, С. Г.; Ostrovskaya, V. M.; Анаев, Э. Х.; Zolotov, Yu. A.

doi:10.1007/s00216-008-2112-y

Cited by 17 publications

(6 citation statements)

References 11 publications

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“…The underlying principles of reflectance and image acquisition on a scanner are essentially the same. The reflectance on any surface at any given wavelength defines the image, and the colors, acquired on the scanner, and such images are analytically related to the chemical composition defining the colors in the image. , Analysis of the digital image through the analysis of the color, and color matching systems, are very well established in the paint, coatings, and printing industries. Color spaces CMYK, RGB, L *a * b *, and HLS are the best-known systems for numeric representation of color.…”

Section: Resultsmentioning

confidence: 99%

Paper Microzone Plates

et al. 2009

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This paper describes 96- and 384-microzone plates fabricated in paper as alternatives to conventional multiwell plates fabricated in molded polymers. Paper-based plates are functionally related to plastic well plates, but they offer new capabilities. For example, paper-microzone plates are thin (approximately 180 microm), require small volumes of sample (5 microL per zone), and can be manufactured from inexpensive materials ($0.05 per plate). The paper-based plates are fabricated by patterning sheets of paper, using photolithography, into hydrophilic zones surrounded by hydrophobic polymeric barriers. This photolithography used an inexpensive formulation photoresist that allows rapid (approximately 15 min) prototyping of paper-based plates. These plates are compatible with conventional microplate readers for quantitative absorbance and fluorescence measurements. The limit of detection per zone loaded for fluorescence was 125 fmol for fluorescein isothiocyanate-labeled bovine serum albumin, and this level corresponds to 0.02 the quantity of analyte per well used to achieve comparable signal-to-noise in a 96-well plastic plate (using a solution of 25 nM labeled protein). The limits of detection for absorbance on paper was approximately 50 pmol per zone for both Coomassie Brilliant Blue and Amaranth dyes; these values were 0.4 that required for the plastic plate. Demonstration of quantitative colorimetric correlations using a scanner or camera to image the zones and to measure the intensity of color, makes it possible to conduct assays without a microplate reader.

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Section: Resultsmentioning

confidence: 99%

Paper Microzone Plates

et al. 2009

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“…Spectrophotometric nitrite analyses are based on the analysis method developed by Griess and Ilosvay in 1941. The main aim of this method is measurement of wave length of azo-dye which is formed by the reaction of 1-naphthylamine with diazonium salt, formed by the reaction of sulphanilic acid with nitrous acid (Figure 2A) [43]. This orange-red colored compound gives maximum absorbance value at 520 nm wave length.…”

Section: Traditional Methods Used In the Determination Of Nitritementioning

confidence: 99%

Nitrite in Nature: Determination with Polymeric Materials

Yenil

Yemiş

2018

Pak. J. Anal. Environ. Chem.

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Nitrogen compounds being important for the vital activities of living things are produced by the nitrification process and occurred spontaneously in the nitrogen cycle. Human vital activities are also responsible for the extra nitrogen released into the atmosphere. So, both human and environmental healths are negatively affected by the increasing nitrate and nitrate amounts in water and soil. For this reason, it is aimed to ensure regular control of nitrates and nitrites at certain levels in order to protect the universe and all living things. Their precise and selective determination by various methods is very important. Their determinations can usually be made by using electrochemical, spectrophotometric, chromatographic and titrimetric methods. Nowadays instead of these techniques, sensors are preferred in determining nitrate and nitrite due to their easy, fast, selective and sensitive application properties. Furthermore, polymeric materials have shown great promise for different sensing applications such as gas, humidity, explosive and water pollutants. Sensors, which are developed by polymerization, have very high quality for the determination of nitrite. The highly sensitive results of optical and electrochemical sensors attract the attention of researchers. In this review, different detection methods for nitrite ions and various studies on the preparation of polymeric sensors that can selectively capture the nitrite ions in complex matrices are examined.

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“…For example, they successfully quantified adsorbed elements and organic compounds on polyurethane foam with comparable results to traditional adsorption-spectrophotometric methods. [58][59][60] Also, flatbed scanners have been used in conjunction with colorimetric assays for pH monitoring, 61,62 and to develop a dopamine biosensor. 63,64 Another emerging application is scanner based digitization of paper based, inkjet printed, microfluidic devices to perform chemical sensing 65 and immunochemistry.…”

Section: Colorimetric Assaysmentioning

confidence: 99%

Biomedical imaging and sensing using flatbed scanners

Gӧrӧcs

Ozcan

2014

Lab Chip

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In this Review, we provide an overview of flatbed scanner based biomedical imaging and sensing techniques. The extremely large imaging field-of-view (e.g., ~600–700 cm2) of these devices coupled with their cost-effectiveness provide unique opportunities for digital imaging of samples that are too large for regular optical microscopes, and for collection of large amounts of statistical data in various automated imaging or sensing tasks. Here we give a short introduction to the basic features of flatbed scanners also highlighting the key parameters for designing scientific experiments using these devices, followed by a discussion of some of the significant examples, where scanner-based systems were constructed to conduct various biomedical imaging and/or sensing experiments. Along with mobile phones and other emerging consumer electronics devices, flatbed scanners and their use in advanced imaging and sensing experiments might help us transform current practices of medicine, engineering and sciences through democratization of measurement science and empowerment of citizen scientists, science educators and researchers in resource limited settings.

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Use of polyurethane foam and 3-hydroxy-7,8-benzo-1,2,3,4-tetrahydroquinoline for determination of nitrite by diffuse reflectance spectroscopy and colorimetry

Cited by 17 publications

References 11 publications

Paper Microzone Plates

Paper Microzone Plates

Nitrite in Nature: Determination with Polymeric Materials

Biomedical imaging and sensing using flatbed scanners

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