Development of miniaturized fluorimetric device for caffeine determination using a smartphone

Luchiari, Natália da Costa; Silva, Gabrielen Alves da; Júnior, César Augusto Marasco; Gomes, Paulo Clairmont Feitosa de Lima

doi:10.1039/c9ra06220c

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…Pengembangan metode analisis kafein secara kolorimetri dapat dilakukan melalui fabrikasi sensor kimia berbasis reagen kimia yang sensitif terhadap keberadaan kafein seperti senyawa fluorofor 8-hidroksipirena-1,3,6trisulfonat (HPTS) [14] menggunakan spektroflurometer serat optik [15] . Selain itu, sensor kafein berbasis kolorimetri ini dapat dikembangkan menggunakan oksidator NaIO4, asam asetat (CH3COOH) dan kromogen MBTH yang sebelumnya digunakan pada metode spektrofotometri [16], [17] .…”

Section: Pemerintah Melalui Badan Pengawasan Obat Dan Makanan (Pom) D...unclassified

Pengembangan Sensor Kimia Berbasis Kertas Untuk Penetapan Kadar Kafein Sampel Kopi

Hidayat

Wahyuning²,

Ningsih³

et al. 2023

J.Ris.Kim.

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The caffeine chemical sensor was developed by co-immobilizing sodium periodate (NaIO4), 3-methyl-2-benzothiazolinone hydrazone (MBTH), and acetic acid (CH3COOH) onto paper by using an adsorption technique. The addition of caffeine solution could change the color of the sensor from white to pale blue which can be then captured by using a flatbed scanner and quantified by the ImageJ program, known as a scanometric technique. Method validation such as linearity, LOD, LOQ, precision, and accuracy of the sensor was done by using caffeine standards. The result of caffeine analysis using the developed chemical sensor-scanometric method agreed with that of the spectrophotometric method, suggesting that the developed sensor with scanometric technique can be used as an alternative method for caffeine assay in coffee samples.

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Section: Pemerintah Melalui Badan Pengawasan Obat Dan Makanan (Pom) D...unclassified

Pengembangan Sensor Kimia Berbasis Kertas Untuk Penetapan Kadar Kafein Sampel Kopi

Hidayat

Wahyuning²,

Ningsih³

et al. 2023

J.Ris.Kim.

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“…In the 3D-printed device, this quenching of uorescence was reected by the increase of the electrical resistance measured using the multimeter. 21 Since HPTS presents maximum absorption at 460 nm, 21,25 the blue LED (maximum emission at 478 nm as shown in Fig. 4A) was used to promote the uorescence phenomenon.…”

Section: Fluorometric Determination Of Cafmentioning

confidence: 99%

“…The analysis required only 4.00 min to be carried out at a cost of US$ 7.50. 25 In other work, Fe(II) and hypochlorite were determined through colorimetric reaction using a 3D-printed device. The 3D-printed device was developed to control the experimental conditions and reduce the errors caused by spurious radiation.…”

Section: Figures Of Meritmentioning

confidence: 99%

Modular 3D-printed fluorometer/photometer for determination of iron(ii), caffeine, and ciprofloxacin in pharmaceutical samples

et al. 2023

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“…However, there are only a few systems that have used a webcam for spectrophotometric measurements [ 24 , 25 ] and especially for fluorometric measurements [ 26 ]. In any case, they require subsequent processing of the digital images obtained through the use of different programs such as: ChemoStat, Photoshop Adobe, Image J, which use image decomposition models such as HSV [ 27 ], CIE L *a* b * [ 28 ] or RGB color [ 29 ] for this purpose. After this, an Excel sheet should be used for the treatment of the quantitative data obtained (e.g., construction calibration curves) and subsequent acquisition of results [ 14 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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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.

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Development of miniaturized fluorimetric device for caffeine determination using a smartphone

Abstract: This study proposes a miniaturized fluorimetric device to determine caffeine in an energy drink and medicines by digital image using a smartphone.

Cited by 10 publications

References 25 publications

Pengembangan Sensor Kimia Berbasis Kertas Untuk Penetapan Kadar Kafein Sampel Kopi

Pengembangan Sensor Kimia Berbasis Kertas Untuk Penetapan Kadar Kafein Sampel Kopi

Modular 3D-printed fluorometer/photometer for determination of iron(ii), caffeine, and ciprofloxacin in pharmaceutical samples

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

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