Test for arsenic speciation in waters based on a paper-based analytical device with scanometric detection

Pena‐Pereira, Francisco; Villar, Lorena; Lavilla, Isela; Bendicho, Carlos

doi:10.1016/j.aca.2018.01.007

Cited by 50 publications

(17 citation statements)

References 53 publications

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“…Figure 2 shows the calibration curves obtained for nitrite and sulfide with both digitization systems. As observed in the figure, the relationship between the analytical response and the concentration of target analytes was found to be nonlinear but a rectangular hyperbolic curve, as previously reported in the literature [31,38–40]. The calibration curves were fitted to a rectangular hyperbolic curve, according to the equation:

I_{c} = \frac{I_{c_{\max}} C}{K + C},

where

I_{c}

is the analytical response,

I_{c_{normalmax}}

is the maximum achievable analytical response, K is a constant equal to the concentration of a given analyte at

I_{c_{\max}} / 2

, and C is the concentration of a target analyte.…”

Section: Resultssupporting

confidence: 58%

“…Cellulose substrates were initially cut into 20 mm diameter circles and two separate squared detection areas were defined in the substrate by formation of hydrophobic barriers following a fabrication process described elsewhere [30,31]. In brief, two squares of 25 mm 2 each were drawn on both sides of the paper substrate with a permanent marker.…”

Section: Methodsmentioning

confidence: 99%

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A paper‐based gas sensor for simultaneous noninstrumental colorimetric detection of nitrite and sulfide in waters

Pena‐Pereira

Matesanz

Lavilla

et al. 2020

J of Separation Science

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The use of paper-based devices in combination with noninstrumental detection systems is becoming increasingly important in the analytical field due to its simplicity, rapidity, and low cost. However, their use for determination of volatile analyte derivatives is still relatively scarce. The present work reports on the assessment of a paper-based gas-sensing approach for the simultaneous noninstrumental colorimetric detection of nitrite and sulfide. Colorimetric systems based on the Griess and methylene blue assays, formation of colored metallic sulfides, and interaction/reaction with in situ generated metallic nanoparticles were preliminary evaluated. Then, the effect of experimental variables affecting the analytical performance of the paper-based gas sensor was studied with two digitization systems, namely a scanner and a smartphone.Under optimal conditions, the developed system yielded limits of detection of 0.055 and 0.005 mg/L for nitrite and sulfide, respectively. The repeatability, expressed as relative standard deviation, was found to be 5.9 and 6.7% for nitrite and sulfide, respectively. The proposed method was finally applied to the analysis of water samples, showing recoveries in the range of 95-105%. K E Y W O R D Snoninstrumental detection, paper-based analytical devices, scanometric analysis, smartphones, water analysis 1908

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I_{c} = \frac{I_{c_{\max}} C}{K + C},

where

I_{c}

is the analytical response,

I_{c_{normalmax}}

is the maximum achievable analytical response, K is a constant equal to the concentration of a given analyte at

I_{c_{\max}} / 2

, and C is the concentration of a target analyte.…”

Section: Resultssupporting

confidence: 58%

Section: Methodsmentioning

confidence: 99%

A paper‐based gas sensor for simultaneous noninstrumental colorimetric detection of nitrite and sulfide in waters

Pena‐Pereira

Matesanz

Lavilla

et al. 2020

J of Separation Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, paper-based detection tools are easier to fabricate, portable, and able to achieve commercial mass production that are suitable for rapid self-test in developing countries [15]. Microfluidic paper-based analytical devices (μPADs) have been widely applied in various fields such as water quality monitoring [16,17], pesticide residues [18], food safety [19,20], and air pollution [20,21] since the first one appeared in 2007 [22]. Nowadays, most of the microfluidic studies on disease markers are being performed by μPADs [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Bladder cancer hunting: A microfluidic paper‐based analytical device

Jiang

Han

Ren³

et al. 2020

Electrophoresis

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Bladder cancer is the fourth most common cancer in men, and it is becoming a prevalent malignancy. Most of the regular clinical examinations are prompt evaluations with cystoscopy, renal function testing, which require high‐precision instrument, well‐trained operators, and high cost. In this study, a microfluidic paper‐based analytical device (μPAD) was fabricated to detect nuclear matrix protein 22 (NMP22) and bladder cancer antigen (BTA) from the urine samples. Urine samples were collected from 11 bladder cancer patients and 10 well‐beings as experiment and control groups, respectively, to verify the working efficiency of μPAD. A remarkable checkout efficiency of up to 90.91% was found from the results. Meanwhile, this method is feasible for home‐based self‐detection from urine samples within 10 min for the total process, which provides a new way for quick, economical, and convenient tumor diagnosis, prognosis evaluation, and drug response.

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“…Paper-based electronic devices have been judged by researchers to hold great promise as an environmentally friendly substrate for flexible electronics due to their inexpensive and common availability worldwide for information storage and packaging [1,2,3]. In recent years, paper-based electronic devices such as “smart paper” were applied to disposable health industry point-of-care bedside [4,5,6,7]. The treatment temperature of paper-based electronic devices must be low because they cannot bear temperatures above 150 °C.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanowires Inks for Flexible Circuit on Photographic Paper Substrate

Yang

Wang

et al. 2018

Micromachines

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Silver nanowires (AgNWs) have inspired many research interests due to their better properties in optical, electric, and flexible applications. One such exploitable use is as the electrical conductive fillers for print electronics. In this paper, AgNWs with mean a diameter of 80 nm and mean length of 13.49 μm were synthesized using the polyol solvothermal method. A sonication-induced scission process was used to obtain AgNWs with a length range of 7.64–11.21 μm. Further AgNWs inks were prepared with the as-synthesized AgNWs as conductive fillers in anhydrous ethanol. The conductive inks were coated on resin coated photographic paper substrate using the knife coating process and dried at room temperature. The effects of the number of layers of AgNWs coating, the concentration of AgNWs, and the length of AgNWs on the microstructure and electrical properties of samples were investigated by scanning electron microscopy and using the four-point probe method. The results show that the conductivity of the AgNWs coating increases with the increase in the number of layers in the AgNWs coating, concentration and length of the AgNWs.

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Test for arsenic speciation in waters based on a paper-based analytical device with scanometric detection

Cited by 50 publications

References 53 publications

A paper‐based gas sensor for simultaneous noninstrumental colorimetric detection of nitrite and sulfide in waters

A paper‐based gas sensor for simultaneous noninstrumental colorimetric detection of nitrite and sulfide in waters

Bladder cancer hunting: A microfluidic paper‐based analytical device

Silver Nanowires Inks for Flexible Circuit on Photographic Paper Substrate

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