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All Journal Jurnal Sains dan Seni ITS Perfecting a Video Game with Game Metrics
Hendro Juwono
Institut Teknologi Sepuluh Nopember
Arts Humanities Computer Science & IT

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Novel pH sensor based on fiber optic coated bromophenol blue and cresol red Fredy Kurniawan; Baginda Zulkarnain; Mohammad Teguh Hermanto; Hendro Juwono; Muhammad Rivai
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 2: April 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i2.9993

Abstract

Fabrication of pH sensor based on fiber optic coated bromophenol blue and cresol red has been done. Briefly, jacket in the middle part of the fiber optic was removed for 5 cm. Then the core of each of fiber optics was washed in ethanol. Nitric acid, demineralized water, and ethanol again consecutively. Then the cleaned core was coated using active material using sol-gel immobilization technique. Tetraehyl orthosilicate was used as a binder in the immobilization of active materials. Bromophenol blue will start change the color to yellow at below pH 3.00±0.01 and blue at above pH 4.60±0.01, while the cresol red will start change the color to yellow at below pH 7.20±0.01 and violet at above pH 8.80±0.01. The pH sensors which have been made show the sigmoidal response over pH from 1.00±0.01 to 11.00±0.01. The sensor has a better performance in comparation with the other sensor.
Adsorpsi Zat Warna Remazol Brilliant Blue R Menggunakan Nata de coco : Optimasi Dosis Adsorben dan Waktu Kontak Puspita Hidayati; Ita Ulfin; Hendro Juwono
Jurnal Sains dan Seni ITS Vol 5, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (553.273 KB) | DOI: 10.12962/j23373520.v5i2.18153

Abstract

Adsorpsi  zat  warna Remazol  Brilliant  Blue  R (RBBR) menggunakan adsorben nata de coco telah dilakukan. Proses adsorpsi dilakukan dengan metode Batch pada variasi dosis adsorben 0,02-3 gram dan waktu kontak 5-120 menit. Kondisi adsorpsi yang optimal menghasilkan efisiensi pengurangan kadar zat warna RBBR yang paling tinggi. Hasil adsorpsi zat warna RBBR optimal pada dosis adsorben 0,1 gram dengan persentase adsorpsi sebesar 95,815% dan waktu kontak 60 menit dengan persentase adsorpsi 96,618%
Co-Authors Baginda Zulkarnain Fredy Kurniawan Ita Ulfin Mohammad Teguh Hermanto Muhammad Rivai Puspita Hidayati