scholarly journals Sistem Pendeteksi Keasaman dan Warna Urine sebagai Indikasi Dini Dehidrasi

ELECTRICES ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 57-61
Author(s):  
Nana - Sutarna
Keyword(s):  
Ph Sensor

Dehidrasi merupakan suatu kondisi kekurangan cairan tubuh karena jumlah cairan yang keluar lebih banyak daripada jumlah cairan yang masuk. Dampak dehidrasi akan beresiko mengalami obesitas dan penurunan konsentrasi. Dehidrasi juga mempengaruhi fungsi kemampuan kognitif otak dan memori seseorang. Dehidrasi akut harus dihindari mengingat bahaya yang ditimbulkannya bagi kesehatan. Tes paling sederhana untuk dehidrasi adalah dengan melihat warna urin. Namun warna urin juga bisa dipengaruhi oleh asupan makanan tertentu. Pada penelitian ini dirancang suatu sistem perkemihan yang dilengkapi dengan sensor warna dan sensor pH. Sensor pH H-101 dan sensor warna TCS3200 digunakan dalam penelitian ini. Sensor pH ditambahkan untuk menghindari kesalahan deteksi urin akibat kesalahan pembacaan warna urin. Sensor TCS3200 diklasifikasikan dalam level warna RGB (Merah, Biru, Hijau). Urin dideteksi dengan tingkat warna atau keasaman pH sebagai masukan untuk menentukan tingkat dehidrasi. Hasil deteksi urin seseorang ditampilkan di layar LCD. Hasil pengukuran menunjukkan bahwa semakin asam atau dominan warna R dan G urin seseorang maka semakin tinggi tingkat dehidrasinya. Batas tingkat hidrasi seseorang jika keasaman urin memiliki pH <6.

Introduction of Digital pH Sensor

2008 ◽  
Vol 62 (9) ◽  
pp. 1127-1130
Author(s):  
Yasuo Watanabe
Keyword(s):  
Ph Sensor

scholarly journals Titanium Nitride Thin Film Based Low-Redox-Interference Potentiometric pH Sensing Electrodes

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 42
Author(s):  
Shimrith Paul Shylendra ◽  
Wade Lonsdale ◽  
Magdalena Wajrak ◽  
Mohammad Nur-E-Alam ◽  
Kamal Alameh
Keyword(s):  
Thin Film ◽  
Titanium Nitride ◽  
Orange Juice ◽  
Ph Sensor ◽  
Reference Electrode ◽  
Cost Effective ◽  
Ph Sensing ◽  
Ph Sensors ◽  
Potential Shift ◽  
Double Junction

In this work, a solid-state potentiometric pH sensor is designed by incorporating a thin film of Radio Frequency Magnetron Sputtered (RFMS) Titanium Nitride (TiN) working electrode and a commercial Ag|AgCl|KCl double junction reference electrode. The sensor shows a linear pH slope of −59.1 mV/pH, R2 = 0.9997, a hysteresis as low as 1.2 mV, and drift below 3.9 mV/h. In addition, the redox interference performance of TiN electrodes is compared with that of Iridium Oxide (IrO2) counterparts. Experimental results show −32 mV potential shift (E0 value) in 1 mM ascorbic acid (reducing agent) for TiN electrodes, and this is significantly lower than the −114 mV potential shift of IrO2 electrodes with sub-Nernstian sensitivity. These results are most encouraging and pave the way towards the development of miniaturized, cost-effective, and robust pH sensors for difficult matrices, such as wine and fresh orange juice.

scholarly journals Ex-Vivo Measurement of the pH in Aqueous Humor Samples by a Tapered Fiber-Optic Sensor

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5075
Author(s):  
Ondřej Podrazký ◽  
Jan Mrázek ◽  
Jana Proboštová ◽  
Soňa Vytykáčová ◽  
Ivan Kašík ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Aqueous Humor ◽  
Fiber Optic ◽  
Ex Vivo ◽  
Sol Gel ◽  
Ph Sensor ◽  
Fiber Optic Sensor ◽  
Optic Sensor ◽  
Tapered Optical Fiber ◽  
Practical Demonstration

A practical demonstration of pH measurement in real biological samples with an in-house developed fiber-optic pH sensor system is presented. The sensor uses 8-hydroxypyrene-1,3,6-trisulfonate (HPTS) fluorescent dye as the opto-chemical transducer. The dye is immobilized in a hybrid sol-gel matrix at the tip of a tapered optical fiber. We used 405 nm and 450 nm laser diodes for the dye excitation and a photomultiplier tube as a detector. The sensor was used for the measurement of pH in human aqueous humor samples during cataract surgery. Two groups of patients were tested, one underwent conventional phacoemulsification removal of the lens while the other was subjected to femtosecond laser assisted cataract surgery (FLACS). The precision of the measurement was ±0.04 pH units. The average pH of the aqueous humor of patients subjected to FLACS and those subjected to phacoemulsification were 7.24 ± 0.17 and 7.31 ± 0.20 respectively.

Wearable hydration and pH sensor based on protein film for healthcare monitoring

2021 ◽  
Author(s):  
Chen Hou ◽  
Fan Zhang ◽  
Caifeng Chen ◽  
Yifan Zhang ◽  
Ronghui Wu ◽  
...  
Keyword(s):  
Ph Sensor ◽  
Protein Film ◽  
Healthcare Monitoring

A versatile color and fluorescence pH sensor based on AIE and open-loop synergy effect: Crystal structure and its application in cell imaging

2021 ◽  
Vol 190 ◽  
pp. 109310
Author(s):  
Zengchen Liu ◽  
Like Wang ◽  
Wenping Zhu ◽  
Yongjie Ding ◽  
Shaohua Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Cell Imaging ◽  
Ph Sensor ◽  
Open Loop ◽  
Synergy Effect

Super-Nernstian pH Sensor Based on Anomalous Charge Transfer Doping of Defect-Engineered Graphene

Nano Letters ◽  
2020 ◽  
Author(s):  
Su-Ho Jung ◽  
Young-Min Seo ◽  
Taejun Gu ◽  
Wonseok Jang ◽  
Seog-Gyun Kang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Ph Sensor
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