scholarly journals Analisis Substansi Najis: Studi Awal Perancangan Alat Deteksi Najis Mukhoffafah dan Mutawassithoh

2021 ◽  
Vol 10 (2) ◽  
pp. 377-386
Author(s):  
Nuraliah Ali ◽  
Putri Fransiska Purnama Pratiwi ◽  
Syarpin Syarpin
Keyword(s):  
Ph Sensor

Penelitian ini bertujuan untuk menganalisis kandungan najis mutawassithoh dan mukhoffafah sebagai suatu studi awal pengembangan inovasi berupa desain alat deteksi najis yang nantinya dapat dimanfaatkan untuk mendeteksi keberadaan najis yang melekat pada tubuh, pakaian, tempat/alat ibadah. Metode penelitian yang digunakan adalah metode framing dan studi literatur. Penelitian ini dimulai dari kegiatan penetapan sampel. Total sampel ditentukan yakni air seni bayi laki-laki yang belum diberi makan apa-apa selain ASI dan air seni orang dewasa. Selanjutnya data akan dianalisis melalui reduksi data, penyajian data, dan verifikasi. Penelitian ini menunjukkan bahwa terdapat perbedaan pada urine kategori mutawassithoh dan mukhoffafah dari segi koefisien serapan liniernya, kandungan amonia dan persentase bakteri. Mendeteksi najis dapat menggunakan sensor fisika dan sensor kimia. Sensor fisika mendeteksi suatu besaran berdasarkan hukum-hukum fisika, yaitu seperti sensor cahaya, suara, gaya, kecepatan, percepatan, maupun sensor suhu. Sensor kimia mendeteksi jumlah zat kimia dengan jalan mengubah besaran kimia menjadi besaran listrik yang melibatkan beberapa reaksi kimia, seperti misalnya pada sensor pH, sensor oksigen, sensor ledakan, serta sensor gas.

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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