Rapid visual and spectrophotometric nitrite detection by cyclometalated ruthenium complex

Lo, Hoi-Shing; Lo, Ka-Wai; Yeung, Chi-Fung; Wong, Chun‐Yuen

doi:10.1016/j.aca.2017.07.018

Cited by 47 publications

(22 citation statements)

References 37 publications

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“…Indeed, the World Health Organization (WHO) has determined a maximum admissible concentration of 3 mg/L in drinking water and of 200 ppm in meat products [12, 13]. Several techniques have been developed during the last decades [14], such as spectrophotometry [15], spectrofluorimetry [16], chemiluminescence [17], chromatography [18, 19], Capillary electrophoresis [20]. However, these conventional methods generally use some hazardous compounds such as phenols and others, they suffer from the poor sensitivity, and they are time consuming [14].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Materials Based on Conducting Polymers for Nitrite Sensing: A Mini Review

Salhi¹,

Ez-zine²,

Rhazi³

2021

Electroanalysis

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Well‐known as a hazardous compound, nitrite constitute a real threat to the public health. So, there is a pressing need to detect and quantify them in different matrix. Even though conventional analytical methods can be used to address this issue, electrochemistry allows a fast, sensitive, and efficient analysis. Conducting polymers continue to raise great interest among scientific communities due to their properties. Moreover, their combination with carbon nanomaterials, or metallic nanoparticles improves their properties, and provides great results. In this paper, we will focus on some revealing works devoted to the electrochemical detection of nitrite using this kind of materials.

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Section: Introductionmentioning

confidence: 99%

Hybrid Materials Based on Conducting Polymers for Nitrite Sensing: A Mini Review

Salhi¹,

Ez-zine²,

Rhazi³

2021

Electroanalysis

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“…Until today, a few approaches based on different principles have been explored and applied for nitrite analysis [1], including chromatography [5][6][7], electrochemistry [8][9][10][11][12][13], fluorometry [14][15][16][17][18][19], and colorimetry [20][21][22][23][24][25][26][27][28][29][30][31][32]. Among these methodologies, colorimetric assays attract special interest because of their superiorities of convenient signal reading, result visualization, and simple operation.…”

Section: Introductionmentioning

confidence: 99%

“…Nam et al successfully developed a nitrite colorimetric hydrogel biosensor using the Griess reagent-based diazo-coupling reaction [23]. In spite of these advances, most of the currently developed colorimetric assays rely on the change of a single signal induced by nitrite [21][22][23][24][25][26][27][28][29][30][31][32], possibly exposing the insufficiency of sensitivity for low-level analyte detection. In addition, these single-signal assays are susceptible to interference in practical application situations.…”

Section: Introductionmentioning

confidence: 99%

Ratiometric Colorimetric Detection of Nitrite Realized by Stringing Nanozyme Catalysis and Diazotization Together

et al. 2021

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Due to the great threat posed by excessive nitrite in food and drinking water to human health, it calls for developing reliable, convenient, and low-cost methods for nitrite detection. Herein, we string nanozyme catalysis and diazotization together and develop a ratiometric colorimetric approach for sensing nitrite in food. First, hollow MnFeO (a mixture of Mn and Fe oxides with different oxidation states) derived from a Mn-Fe Prussian blue analogue is explored as an oxidase mimic with high efficiency in catalyzing the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) oxidation to blue TMBox, presenting a notable signal at 652 nm. Then, nitrite is able to trigger the diazotization of the product TMBox, not only decreasing the signal at 652 nm but also producing a new signal at 445 nm. Thus, the analyte-induced reverse changes of the two signals enable us to establish a ratiometric colorimetric assay for nitrite analysis. According to the above strategy, facile determination of nitrite in the range of 3.3–133.3 μM with good specificity was realized, providing a detection limit down to 0.2 μM. Compared with conventional single-signal analysis, our dual-signal ratiometric colorimetric mode was demonstrated to offer higher sensitivity, a lower detection limit, and better anti-interference ability against external detection environments. Practical applications of the approach in examining nitrite in food matrices were also verified.

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“…The colorimetric sensor is being examined by scientists and engineers in the field of nitrite discrimination due to its speed and ability to be visualized by naked eyes [31][32][33][34][35]. Among them, the catalytic spectrophotometric method was extensively investigated based on the reaction between an oxidizing agent (potassium bromate, potassium chlorate, potassium permanganate, and hydrogen peroxide) and some organic dyes in the presence of nitrite, which leads to the color change of dyes and quantitative detection of nitrite [36,37].…”

Section: Introductionmentioning

confidence: 99%

Phenosafranin-Based Colorimetric-Sensing Platform for Nitrite Detection Enabled by Griess Assay

Hou

Shen

et al. 2020

Sensors

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A facile and effective colorimetric-sensing platform based on the diazotization of phenosafranin for the detection of NO 2 − under acidic conditions using the Griess assay is presented. Diazotization of commercial phenosafranin produces a color change from purplish to blue, which enables colorimetric quantitative detection of NO 2 − . Optimal detection conditions were obtained at a phenosafranin concentration of 0.25 mM, HCl concentration of 0.4 M, and reaction time of 20 min. Under the optimized detection conditions, an excellent linearity range from 0 to 20 μM was obtained with a detection limit of 0.22 μM. Favorable reproducibility and selectivity of the colorimetric sensing platform toward NO 2 − were also verified. In addition, testing spiked ham sausage, bacon, and sprouts samples demonstrated its excellent practicability. The presented colorimetric sensing platform is a promising candidate for the detection of NO 2 − in real applications.

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Rapid visual and spectrophotometric nitrite detection by cyclometalated ruthenium complex

Cited by 47 publications

References 37 publications

Hybrid Materials Based on Conducting Polymers for Nitrite Sensing: A Mini Review

Hybrid Materials Based on Conducting Polymers for Nitrite Sensing: A Mini Review

Ratiometric Colorimetric Detection of Nitrite Realized by Stringing Nanozyme Catalysis and Diazotization Together

Phenosafranin-Based Colorimetric-Sensing Platform for Nitrite Detection Enabled by Griess Assay

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