Linearity range enhancement in direct detection of low concentration uric acid

Yaacob, Afiqah; Ngajikin, Nor Hafizah; Rashid, Nurfatihah Che Abd; Yaacob, Maslina; Ali, Siti Hajar Aminah; Azmi, Nur Ellina; Cholan, Noran Azizan

doi:10.1016/j.ijleo.2021.168243

Cited by 4 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, the LOD is determined based on the the slope (sensitivity) of the calibration curve and the standard deviation of the linear graph with confidence factor of 3.3. The relationship of LOD is shown in the equation (3) [25]. Based on equation (3), the LOD obtained for the straight fiber optic sensor is 3.3780 mg l −1 .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Ammonia detection in water with balloon-like plastic optical fiber sensor

et al. 2023

Self Cite

View full text Add to dashboard Cite

This work presents the demonstration of a plastic optical fiber (POF)-based ammonia sensor. The sensor head is formed by bending an unclad fiber optic sensor into a balloon-like structure. The bending radius of the balloon-like bent fiber optic sensor is varied from 1.0 to 2.5 cm. The performance of each sensor is tested using ammonia solution with concentration ranging from 0 to 15 mg/L. Results show that the optimized performances of the proposed sensor occur when the bending radius is fixed at 1.5 cm. At this bending radius, the sensor illustrates the sensitivity of - 0.0024 (mg/L)-1 with linearity of 0.97 and resolution of - 4.17 mg/L. For comparison, the bent sensor is compared to the straight sensor and performances of the former is found to be more superior. In addition, the balloon-like bent sensor is further tested with real water samples. The sensor sensitivity is found to be - 0.0022 (mg/L)-1 with linearity of 0.95 and resolution of - 4.54 mg/L. The result shows that the sensor has comparable performance in the ammonia detection for both pure ammonia and real water samples. In essence, this balloon-like bent sensor functions without additional coating on the sensor head, making it favorable in terms of the simplicity of the design.

show abstract

Section: Resultsmentioning

confidence: 99%

“…For further study, precision of the sensor is calculated based on the stability graph shown in figure 9. The mathematical formulation for the stability precision is as follows [25]:…”

Section: Resultsmentioning

confidence: 99%

Ammonia detection in water with balloon-like plastic optical fiber sensor

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Progress in optical sensors-based uric acid detection

Jiang

Sun

et al. 2023

Biosensors and Bioelectronics

View full text Add to dashboard Cite

Optical monitoring of hemodialysis using noninvasive measurement of uric acid in the dialysate

Żyłka,

Tęcza,

Szemela

et al. 2023

Sci Rep

View full text Add to dashboard Cite

The aim of this study was to present a methodology for predicting changes in uric acid concentrations in the blood of chronically hemodialyzed patients based on an optical measurement of the intensity of selected wavelengths in the dialysate. Blood samples were taken from the arterial line every 30 min throughout the hemodialysis period, to measure uric acid levels. Simultaneously, optical measurements were made on dialysate flowing from the dialyzer. Uric acid concentration can be measured either directly from the blood or from dialyzer outflow with acceptable error. In addition, both methods reveal any increased dynamics in uric acid concentration in the initial phase of hemodialysis. The wavelength of the light was adjusted for optimal uric acid particle detection. Comparing the uric acid concentration measured in the blood of patients with the intensity of wave absorption in the dialysate, the functional relationship between the uric acid concentration levels was determined. Using the optical method for measuring uric acid concentration in the dialysate, the concentration of uric acid in the blood during hemodialysis can be non-invasively and accurately estimated. This method can be used to assess the adequacy of hemodialysis by computer acquisition of uric acid concentrations determined in on-line dialysate.

show abstract

Linearity range enhancement in direct detection of low concentration uric acid

Cited by 4 publications

References 12 publications

Ammonia detection in water with balloon-like plastic optical fiber sensor

Ammonia detection in water with balloon-like plastic optical fiber sensor

Progress in optical sensors-based uric acid detection

Optical monitoring of hemodialysis using noninvasive measurement of uric acid in the dialysate

Contact Info

Product

Resources

About