MATLAB assisted disposable sensors for quantitative determination of arsenic

Sharma, Ruchi Dubey; Joshi, Smita; Amlathe, Sulbha

doi:10.1039/c0ay00584c

Cited by 20 publications

(11 citation statements)

References 16 publications

(12 reference statements)

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“…Another colorimetric method for arsenic detection is the reaction presented by Sharma et al using sulfanilic acid and N-(1-naphtyl) ethylene diamine hydrochloride (NEDA). 68 Here, arsenic(III) in solution first reduces the sulfanilic acid; the resultant product then goes on to react with NEDA to produce a magenta-coloured product. Sharma et al carry out the entire process on disposable thin-layer chromatography (TLC) strip paptodes, and image the reaction using a colour scanner and MATLAB quantification of the detected RGB values.…”

Section: Sulfanilic Acid -Nedamentioning

confidence: 99%

Detection of trace arsenic in drinking water: challenges and opportunities for microfluidics

Yogarajah¹,

Tsai²

2023

Preprint

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Arsenic contamination of drinking water is a major global problem, with contamination in Bangladesh deemed most serious. Although the current World Health Organisation (WHO) maximum contamination limit (MCL) for arsenic in drinking water is 10 μg L−1, due to practical and economic constraints, the standard limit in Bangladesh and many other developing nations is 50 μg L−1. We propose that an ideal arsenic sensor, designed for routine monitoring, will have five essential qualities: sensitivity and selectivity for arsenic; speed and reliability; portability and robustness; reduced health and environmental risks; and affordability and ease of use for local technicians. It is our opinion that many of these characteristics can be accentuated by microfluidic systems. We describe candidate colorimetric, electrochemical, biological, electrophoretic, surface-sensing, and spectroscopic methods for arsenic detection; and comment on their potential for portable microfluidic adaptation. We also describe existing developments in the literature towards the ultimate creation of microfluidic total analysis systems (μTASs) for arsenic detection. The fundamental purpose of this review is to highlight the need for better portable arsenic contamination detection, and describe how microfluidic technology may be developed to address this need.

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Section: Sulfanilic Acid -Nedamentioning

confidence: 99%

Detection of trace arsenic in drinking water: challenges and opportunities for microfluidics

Yogarajah¹,

Tsai²

2023

Preprint

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“…Another colorimetric method for arsenic detection is the reaction presented by ethylene diamine hydrochloride (NEDA) (Sharma et al 2011). Here, arsenic (III) in solution first reduces the sulfanilic acid; the resultant product then goes on to react with NEDA to produce a magenta-coloured product.…”

Section: Sulfanilic Acid-nedamentioning

confidence: 99%

Development of a simple, portable, colorimetric arsenic sensor based on Molybdenum Blue Chemistry

Yogarajah¹

2021

Preprint

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Ultrasound imaging based on transmitting plane waves (PW) enables ultrafast imaging. Coherent PW compounding ultrasound imaging can reach the image quality of optimal multifocus image. In the image reconstruction, it was assumed that an infinite extent PWs was emitted. In this thesis, we propose a new image reconstruction algorithm – Synthetic-aperture plane-wave (SAPW) imaging – without using this assumption. The SAPW imaging was compared with the PWs imaging in numerical simulations and experimental measurements. The measured RF data in PW imaging was first decoded in the frequency domain using a pseudoinverse algorithm to estimate the RF data Then, SAPW RF data were used to reconstruct images through the standard synthetic transit aperture (STA) method. Main improvements in the image quality of the SAPW imaging in comparison with the PWs imaging are increases in the depth of penetration and the field of view when contrast-to-noise ratio (CNR) was used as a quantitative metric

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“…The paptode is simply a paper or other ordinary porous material such as clay or cotton or Whatman filter paper or ordinary filter paper or even TLC can be used as a substrate support for reagent. A thorough description of RGB analysis has been described by Amlathe and co-workers [10] . The usual methods for determination of cadmium involve Electrothermal atomization, GFAAS, Electrothermal Atomic Absorption spectrometry, Extraction spectrophotometry, Kinetic spectrophotometry, pulse polarography, spectrophotometry, Zeeman background correction, ICPMS, radiochemical neutron activation analysisetc.…”

Section: Introductionmentioning

confidence: 99%

“…DCA Analysis for lithium has also been reported [9] . Paptodes for quantitative determination of various metal ions As, Fe, Hg, Zn and Se have been reported [10][11][12][13][14][15][16] . The paptode is simply a paper or other ordinary porous material such as clay or cotton or Whatman filter paper or ordinary filter paper or even TLC can be used as a substrate support for reagent.…”

Section: Introductionmentioning

confidence: 99%