Water salinity detection using a smartphone

Hussain, Iftikar; Das, Madhusweta; Ahamad, Kamal Uddin; Nath, Pabitra

doi:10.1016/j.snb.2016.08.102

Cited by 83 publications

(35 citation statements)

References 27 publications

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“…Interestingly, free Internet services like Internet.org (a Facebook‐led initiative) can even be accessed in many African and other countries (in Asia and Latin America) without a data plan which may further drive Internet‐enabled diagnostics. For example, among others, the imaging capabilities of smartphones have been exploited for the analysis of semen, iron concentration in blood or even amplification and fluorescent detection of genetic materials from viruses using disposable sampling and sensing elements. The detection capabilities of smartphones can also be extended beyond just imaging.…”

Section: Fields Of Applicationmentioning

confidence: 99%

Disposable Sensors in Diagnostics, Food, and Environmental Monitoring

et al. 2019

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Disposable sensors are low‐cost and easy‐to‐use sensing devices intended for short‐term or rapid single‐point measurements. The growing demand for fast, accessible, and reliable information in a vastly connected world makes disposable sensors increasingly important. The areas of application for such devices are numerous, ranging from pharmaceutical, agricultural, environmental, forensic, and food sciences to wearables and clinical diagnostics, especially in resource‐limited settings. The capabilities of disposable sensors can extend beyond measuring traditional physical quantities (for example, temperature or pressure); they can provide critical chemical and biological information (chemo‐ and biosensors) that can be digitized and made available to users and centralized/decentralized facilities for data storage, remotely. These features could pave the way for new classes of low‐cost systems for health, food, and environmental monitoring that can democratize sensing across the globe. Here, a brief insight into the materials and basics of sensors (methods of transduction, molecular recognition, and amplification) is provided followed by a comprehensive and critical overview of the disposable sensors currently used for medical diagnostics, food, and environmental analysis. Finally, views on how the field of disposable sensing devices will continue its evolution are discussed, including the future trends, challenges, and opportunities.

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Section: Fields Of Applicationmentioning

confidence: 99%

Disposable Sensors in Diagnostics, Food, and Environmental Monitoring

et al. 2019

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“…Salinity measures the amount of dissolved salts (NaCl, KCl and MgCl 2 ) in water (Hussain et al, 2017). Washing of un-adsorbed salt from irrigation water in soils into rivers can also result in high salinity (Ruiz et al 2011).…”

Section: Salinitymentioning

confidence: 99%

Occurrence of PAHs in water samples of the Diep River, South Africa

Awe

Opeolu

Olatunji

et al. 2020

WSA

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Water SA 46(1) 80-93 / Jan 2020 https://doi.org/10.17159/wsa/2020.v46.i1.7888 Method development on gC-FIDA SPE-GC-FID method was developed for the simultaneous recovery and determination of the 16 PAHs, while a GC coupled to FID was optimised for the separation of the PAH extracts, and quantitation of each of the separated fractions. Standards and calibration solutionsStock solutions (1 000 µg/mL) of the 16 PAHs were prepared by dissolving 0.01 g of each PAH in dichloromethane (DCM) in 10 mL standard flask. A working mixture (cocktail), containing the 16-PAHs mix at 1 000 µg/mL was also prepared. The stock solutions were subsequently transferred into amber vials and kept refrigerated at 4°C until use. The calibration standards (1 µg/mL, 2 µg/mL, 5 µg/mL, 10 µg/mL and 50 µg/mL) were serially prepared from the stock solution by successive dilution with appropriate volume of dichloromethane and stored at 4°C prior to GC-FID analysis.

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“…The same system with minor modifications was also used to detect other water contaminants: iron(II) in the concentration range 0 -5 mg•L -1 using a 510 nm peak wavelength LED and phosphate in the concentration range 0 -3 mg•L -1 using a 880 nm peak wavelength LED [141]. The same research group developed also other smartphone based optical sensing systems for the analysis of water: a system for the estimation of mercury level concentration, based on fluorescence emission detected by the phone camera, [142] and two systems, exploiting the phone flash LED to generate the radiation and the embedded light sensor for detection, to measure the fluoride level in drinking water [143] and the salinity level in oceanic water environment [144]. To provide a more standard port for power supply and wired communication with external hardware, some authors have proposed an interface based on the phone audio jack [146].…”

Section: Wired Communicationmentioning

confidence: 99%

A sensor-centric survey on the development of smartphone measurement and sensing systems

Grossi

2019

Measurement

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Modern mobile phones, featuring high performance microprocessors, rich set of sensors and internet connectivity are largely diffused all over the world and are ideal devices for the development of low-cost sensing systems, in particular for low-income developing countries and rural areas that lack the access to diagnostic laboratories and expensive instrumentation. In the design of a smartphone based sensing system different elements must be taken in consideration such as sensors performance, acquisition rate and privacy preserving strategies when personal data must be shared in the cloud. In this paper a sensor-centric survey on smartphone based sensing systems is presented, covering different fields of application. Two different development approaches will be discussed: 1) the exploitation of the large number of sensors embedded in modern smartphones (high-resolution camera, microphone, accelerometer, gyroscope, magnetometer, GPS); 2) the interfacing with external sensors that communicate with the smartphone by the embedded wireless or wired communication technology.

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Water salinity detection using a smartphone

Cited by 83 publications

References 27 publications

Disposable Sensors in Diagnostics, Food, and Environmental Monitoring

Disposable Sensors in Diagnostics, Food, and Environmental Monitoring

Occurrence of PAHs in water samples of the Diep River, South Africa

A sensor-centric survey on the development of smartphone measurement and sensing systems

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