2015
DOI: 10.3390/bioengineering2020122
|View full text |Cite
|
Sign up to set email alerts
|

Handheld Device Adapted to Smartphone Cameras for the Measurement of Sodium Ion Concentrations at Saliva-Relevant Levels via Fluorescence

Abstract: The use of saliva sampling as a minimally-invasive means for drug testing and monitoring physiology is a subject of great interest to researchers and clinicians. This study describes a new optical method based on non-axially symmetric focusing of light using an oblate spheroid sample chamber. The device is simple, lightweight, low cost and is easily attached to several different brands/models of smartphones (Apple, Samsung, HTC and Nokia) for the measurement of sodium ion levels at physiologically-relevant sal… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

0
4
0

Year Published

2016
2016
2020
2020

Publication Types

Select...
3
2
1

Relationship

0
6

Authors

Journals

citations
Cited by 6 publications
(4 citation statements)
references
References 25 publications
0
4
0
Order By: Relevance
“…Detection methods in developing countries for tropical diseases need to be accurate and performed in a timely manner to prevent disease. The approach described in this study aimed to combine gold nanoparticle conjugates with a portable (smartphone) sensor for detecting with a high level of sensitivity at low antigen levels [ 8 ]. The first part of the study described was the calibration of the gold nanoparticle size ( Figure 1 ).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Detection methods in developing countries for tropical diseases need to be accurate and performed in a timely manner to prevent disease. The approach described in this study aimed to combine gold nanoparticle conjugates with a portable (smartphone) sensor for detecting with a high level of sensitivity at low antigen levels [ 8 ]. The first part of the study described was the calibration of the gold nanoparticle size ( Figure 1 ).…”
Section: Discussionmentioning
confidence: 99%
“…A previously described handheld smartphone-enabled optical caustic light scattering sensor was used to capture images of samples in an oblate spheroid chamber [ 5 , 8 ]. A 532 nm green photodiode (Industrial Fiber Optics, Tempe, AZ, USA) illuminated the sample chamber at a 90° angle from a Nokia Lumia 920 (Nokia, Espoo, Finland) smartphone camera lens.…”
Section: Methodsmentioning
confidence: 99%
“…Similarly, the concentration of lactate in oral fluids and sweat samples have been measured via HRP‐induced colorimetric and chemiluminescent reactions coupled to smartphones , as well as sensitive measurements of pH and Na + ions in sweat and saliva samples (Fig. a) . For instance, for the detection of Na + ions, Lipowicz et al .…”
Section: Smartphone‐based Diagnostic Systemsmentioning
confidence: 99%
“…For instance, for the detection of Na + ions, Lipowicz et al . adopted a sample microfluidic chamber with a special geometrical shape and a holographic diffraction grating film, which allowed to focus the excitation light and hence improve the fluorescence signals from the samples. Similar approaches have been reported for electrolytes such as potassium, chloride and calcium .…”
Section: Smartphone‐based Diagnostic Systemsmentioning
confidence: 99%