Design of an automatic spectrophotometric system

Barzallo, Diego; Danchana, Kaewta; Cerdà, Vı́ctor; Palacio, Edwin

doi:10.1016/j.talanta.2020.121163

Cited by 5 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The product formed showed a purple color immediately after the reaction was performed, whose intensity increases with the concentration of NOR. Colorimetric measurements using the 3D device were made with a 500 nm monochromatic LED to selectively excite the sample (increase its sensitivity), which also avoids the use of filters or monochromators [ 11 ], then the digital images were captured and processed through the software developed in Matlab. The best results were obtained with a blue calibration curve as shown in Figure 2 B.…”

Section: Resultsmentioning

confidence: 99%

“…These results were similar to those obtained by other authors using other analytical techniques [ 55 , 56 , 57 ]. In addition, in a previous work carried out by authors [ 11 ], the interference effects in quinine determination from beverage samples were reported, where the only interferent that can quench the quinine fluorescence is chloride ion. However, it does not interfere at concentrations below 0.4 mM, which generally is the content in a tonic drink [ 58 , 59 ].…”

Section: Resultsmentioning

confidence: 99%

“…The development of new and miniaturized light sources in comparison with unlike traditional light sources such as tungsten bulbs, has allowed the advance of inexpensive, miniaturized, and robust methods. An example of this is the LED, which has been coupled into portable microfluidic chips for fluorescent detection [ 9 , 10 ] or integrated both into a multi-syringe flow injection analysis (MSFIA) fluorimetric system [ 11 ] or a lab-in-syringe flow system exploiting dispersive liquid-liquid micro-extraction for spectrophotometric detection [ 12 ]. In addition, several detectors [ 13 ] based on digital images have allowed the increasing use of in-situ spectroscopic techniques [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the main use of the quinine is as flavouring for tonic drinks due to its bitter taste. The European Union legislation established a maximum limit of Quinine in soft drinks of 100 mg L −1 due to it causing health problems by exceeding the permissible limit [ 11 , 41 ]; so it is essential to determine the concentrations of both food additives in soft drinks.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multifunctional Portable System Based on Digital Images for In-Situ Detecting of Environmental and Food Samples

et al. 2023

Self Cite

View full text Add to dashboard Cite

The development of a portable device created by 3D printing for colorimetric and fluorometric measurements is an efficient tool for analytical applications in situ or in the laboratory presenting a wide field of applications in the environmental and food field. This device uses a light-emitting diode (LED) as radiation source and a webcam as a detector. Digital images obtained by the interaction between the radiation source and the sample were analyzed using a programming language developed in Matlab (Mathworks Inc., Natick, MA, USA), which builds the calibration curves in real-time using the RGB colour model. In addition, the entire system is connected to a notebook which serves as an LED and detector power supply without the need for any additional power source. The proposed device was used for the determination in situ of norfloxacin, allura red, and quinine in water and beverages samples, respectively. For the validation of the developed system, the results obtained were compared with a conventional spectrophotometer and spectrofluorometer respectively with a t-test at a 95% confidence level, which provides satisfactory precision and accuracy values.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multifunctional Portable System Based on Digital Images for In-Situ Detecting of Environmental and Food Samples

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Microflow injection analysis based on modular 3D platforms and colorimetric detection for Fe(III) monitoring in a wide concentration range

Ricart,

Dorado,

Lao-Luque

et al. 2023

Microchim Acta

View full text Add to dashboard Cite

A modular microflow injection analysis (microFIA) system for the determination of Fe(III) in a bioleaching reactor has been designed, developed and validated. The different modules of the analyzer (mixer, diluter, disperser and detector) were 3D-printed. Fe(III) quantification is due by measuring the color intensity of the chelate formed between Fe(III) and salicylic acid at 525 nm. The device has been designed to dilute, disperse and detect high Fe(III) concentrations in the form of an inexpensive multi-step photometric flow cell that uses an light-emitting diode (LED) as a light source and an light-dependent resistor (LDR) as a light intensity detector. This microFIA system has been shown to be suitable for automatic and continuous determination of Fe(III) in the operation of a bioreactor for the oxidation of Fe(II). The device has a good repeatability (less than 5% of coefficient of variation in the whole range of concentrations) and accuracy of around 100%. The analyzer features an exceptional wide linear range, between 25 and 6000 mg·L−1. The device was successfully applied to the determination of Fe(III) in real samples. The obtained results proved that the method is applicable for accurate, precise, rapid, and low-cost colorimetric analysis and didn’t show significant differences with a conventional UV–Vis method. Graphical Abstract

show abstract

Field-deployable method for iron analysis using a simple preconcentration procedure and a 3D portable spectrophotometric system

Vargas-Muñoz

Danchana²,

Cerdà³

et al. 2021

Microchemical Journal

View full text Add to dashboard Cite

Design of an automatic spectrophotometric system

Cited by 5 publications

References 18 publications

Multifunctional Portable System Based on Digital Images for In-Situ Detecting of Environmental and Food Samples

Multifunctional Portable System Based on Digital Images for In-Situ Detecting of Environmental and Food Samples

Microflow injection analysis based on modular 3D platforms and colorimetric detection for Fe(III) monitoring in a wide concentration range

Field-deployable method for iron analysis using a simple preconcentration procedure and a 3D portable spectrophotometric system

Contact Info

Product

Resources

About