Mobile-platform based colorimeter for monitoring chlorine concentration in water

Sumriddetchkajorn, Sarun; Chaitavon, Kosom; Intaravanne, Yuttana

doi:10.1016/j.snb.2013.10.024

Cited by 110 publications

(45 citation statements)

References 26 publications

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“…[20][21][22][23][24][25][26][27][28][29] For example, we and others have constructed low-cost photometers based on this principle to measure i) antibodies against HIV in serum, 21 ii) hemoglobin [22][23] in blood, and iii) fluoride 27 and mercury 29 in water samples.…”

Section: Introductionmentioning

confidence: 99%

Broadly Available Imaging Devices Enable High-Quality Low-Cost Photometry

et al. 2015

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This paper demonstrates that, for applications in resource-limited environments, expensive microplate spectrophotometers-which are used in many central laboratories for parallel measurement of absorbance of samples-can be replaced by photometers based on inexpensive and ubiquitous, consumer electronic devices (e.g., scanners and cell-phone cameras). Two devices-i) a flatbed scanner operating in transmittance mode and ii) a camera-based photometer constructed from a cell phone camera, a planar light source, and a cardboard box-demonstrate the concept. These devices illuminate samples in microtiter plates from one side, and use the RGB-based imaging sensors of the scanner/camera to measure the light transmitted to the other side. The broadband absorbance of samples (RGB-resolved absorbance) can be calculated using the RGB color values of only three pixels per micro-well. Rigorous theoretical analysis establishes a well-defined relationship between the absorbance spectrum of a sample and its corresponding RGB-resolved absorbance. The linearity and precision of measurements performed with these low-cost photometers on different dyes that absorb across the range of the visible spectrum, and chromogenic products of assays (e.g., enzymatic, ELISA) demonstrates that these low-cost photometers can be used reliably in a broad range of chemical and biochemical analyses. The ability to perform accurate measurements of absorbance on liquid samples, in parallel and at low cost, would enable testing, typically reserved for well-equipped clinics and laboratories, to be performed in circumstances where resources and expertise are limited.

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Section: Introductionmentioning

confidence: 99%

Broadly Available Imaging Devices Enable High-Quality Low-Cost Photometry

et al. 2015

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“…Nowadays, these devices are used in areas such as telemedicine [33], microscopy [34], biology [35] or fluorescent imaging [36], among others.…”

Section: Mobile Cameramentioning

confidence: 99%

Smartphones as a Light Measurement Tool: Case of Study

et al. 2017

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Abstract:In recent years, smartphones have become the main computing tool for most of the population, making them an ideal tool in many areas. Most of these smartphones are equipped with cutting-edge hardware on their digital cameras, sensors and processors. For this reason, this paper discusses the possibility of using smartphones as an accessible and accurate tool, focusing on the measurement of light, which is an element that has a high impact on human behavior, which promotes conformance and safety, or alters human physiology when it is inappropriate. To carry out this study, three different ways to measure light through smartphones have been checked: the ambient light sensor, the digital camera and an external Bluetooth luxmeter connected with the smartphone. As a result, the accuracy of these methods has been compared to check if they can be used as accurate measurement tools.

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“…Till now nanoparticles are not applied for TSD determination from any biological fluids. Now a days various authors have attracted towards smartphone, as smartphone based colorimetric sensor prove to be an inventive technology (Guan-Hua et al, 2014;Sumriddetchkajorn et al, 2014;Moonrungsee et al, 2015). Smartphone provide a simple colorimetric detection (Shen et al, 2012).…”

Section: Introductionmentioning

confidence: 99%