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All Journal VALENSI Jurnal Penelitian Saintek Jurnal Natur Indonesia Alchemy : Journal of Chemistry Jurnal Ilmu Kimia Universitas Brawijaya Natural B The Journal of Pure and Applied Chemistry Research SEMIRATA 2015 Jurnal Fisika FLUX ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Jurnal Otomasi Kontrol dan Instrumentasi Chemistry Indonesian Journal of Chemical Research Indonesian Journal of Chemical Analysis (IJCA) Molekul: Jurnal Ilmiah Kimia Jurnal Jejaring Matematika dan Sains Bubungan Tinggi: Jurnal Pengabdian Masyarakat Rengganis Jurnal Pengabdian Masyarakat Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Makara Journal of Science
Ani Mulyasuryani
Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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Journal : VALENSI

 1 
Adsorpsi Pb2+ dan Cu2+ Menggunakan Kitosan-Silika dari Abu Sekam Padi Ani Mulyasuryani; Barlah Rumhayati; Chandrawati Cahyani; Soebiantoro soebiantoro
Jurnal Kimia Valensi Jurnal Valensi Volume 3, No.2, November 2013
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.982 KB) | DOI: 10.15408/jkv.v3i2.504

Abstract

Abstrak Silika dari abu sekam padi yang dimodifikasi dengan kitosan menghasilkan suatu adsorben yang dapat meningkatkan daya adsorpsi terhadap ion logam. Adsorben kitisan – silika dari abu sekam padi dibuat dengan komposisi 100, 95, 85, 75 dan 65 %  silika dalam kitosan. Hasil penelitian menunjukkan bahwa peningkatan jumlah kitosan dapat meningkatkan nilai kapasitas tukar kation (KTK) adsorben. Adsorben terbaik dihasilkan pada % silika 65% dengan KTK 0,45 mekiv H+/g adsorben. Adsorbent tersebut mempunyai daya adsorpsi terhadap Pb2+ sebesar 11,8 mg/g adsorben dan 0,3 mg/g adsorben terhadap Cu2+.   Kata kunci : adsorpsi, abu sekam padi, kapasitas tukar kation, kitosan   Abstract Modification of silica from rice husk ash with chitosan resulted a high capacity adsorbant. The composition of silica from rice husk ash in adsorbent are 100, 95, 85, 75, and 65% in chitosan. The result of researsh show that the chitosan increasing cation exchange capasity (CEC) of adsorbent. The best adsorbent is 65% silica with CEC 0,45 mekiv H+/g adsorbent. The adsorbent has ability to adsorb Pb2+ is 11,8 mg/g adsorben and 0,3 mg/g adsorben to Cu2+.   Keywords : adsorption, rice ash husk, cation exchange capacity, chitosan
Kinerja Biosensor Konduktometri Berbasis (Screen Printed Carbon Electrode) SPCE––Kitosan untuk Deteksi Diazinon, Malation, Klorpirifos dan Profenofos Nuzulul Kurniawan Isvani; Ani Mulyasuryani; Sasangka Prasetyawan
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 1, No. 2, November 2015
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1059.417 KB) | DOI: 10.15408/jkv.v0i0.3156

Abstract

The performance of biosensor is based on the hydrolysis reaction of organophosphorus compounds catalyzed by organophosphate hydrolase (OPH), produce H+ and the other ionic species that increase conductance on the surface of electrode. In this research, OPH was immobilized by crosslinking on chitosan–glutaraldehyde membrane on the (Screen Printed Carbon Electrode) SPCE surface. Measurements were carried out at the range concentration 0 to 3.0 ppm of organophosphate, the range of pH 7.0 to 9.0 and 5–25 mL of enzyme. The result showed that optimum performances were obtained at 25 mL of OPH, pH 8.5, with the sensitivity for dizinon, malathion, chlorpirifos and profenofos is 1.353 mS/ppm, 1.270 mS/ppm, 1.230 mS/ppm dan 1.77 mS/ppm respectively and 0.97; 1.03; 0.98; 0.97 of LOD. DOI :http://dx.doi.org/10.15408/jkv.v0i0.3156.
Penentuan Hidrokuinon dalam Sampel Krim Pemutih Wajah secara Voltammetri Menggunakan Screen Printed Carbon Electrode (SPCE) Ani Mulyasuryani; Alfita Savitri
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 1, No. 2, November 2015
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (507.284 KB) | DOI: 10.15408/jkv.v0i0.3145

Abstract

Hydroquinone in whitening face cream has been banned since 2008, but is still found facial bleaching creams containing hydroquinone. Therefore, in this study have been developed voltammetric method for the determination hydroquinone in face whitening cream. This study has been carried out optimization of pH and measurement conditions. Optimizationof pH has been done in cyclic voltammetry, while the optimization of measurement carried out by differential pulse voltammetry. In this study, using a screen printed carbon electrode with a three electrode system. The results showed that the increase in pH causes a decrease in the anodic peak potential (Epa) of hydroquinone. The optimum conditions resulted at pH 2 in which the anodic current (Ipa) is the highest. The optimum condition resulted at high pulse 200 mV and scan rate at 15 mV/sec. The linear regression concentration is 1-100 μM, limit of detection is 0.015 μM and sensitivity is 0.0652 μM/µA. The results showed that the concentration of hydroquinone in the face whitening cream samples ranged from 0 to 0.02%DOI :http://dx.doi.org/10.15408/jkv.v0i0.3145.
Modification of Glassy Carbon Electrodes on Starch-Based for Detection of Chromium Hexavalent Asnaili Alfi Nurillah; Ani Mulyasuryani; Hermin Sulistyarti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 2, November 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i2.24891

Abstract

The purpose of this study was to study the effect of the percentage of the addition of conductivity material in phosphorylation starch to modify GCE (glassy carbon electrode) for detection of Cr(VI). In this study, the technique used is DPV (Differential Pulse Voltammetry). The conductivity material used in this study is activated carbon and Fe3O4 nanoparticles. The method used is an optimization of conductivity material in phosphorylation starch and determination of the performance of the obtained sensor. The optimum percentage of conductivity materials, both activated carbon and Fe3O4 nanoparticles, in the phosphorylation starch matrix is 5%. The form of amorphous activated carbon and the structure trigonal of Fe3O4 nanoparticles affects the current of Cr(VI). The addition of conductive material increases the current of Cr(VI) and shifts the peak potential to the left. The performance of PSC1 sensor is a detection limit of 5,09 ppm and sensitivity of 0,2098 ppm/µA in the linear concentration range of 2,6 – 15,6 ppm. However,  the performance of PSN1 sensor is the detection limit of 3,48 ppm and sensitivity of 0,2120 ppm/µA in the linear concentration range of 2,6 – 18,2 ppm.  
Co-Authors - Muhiroh Adam Wiryawan Adam Wiryawan Afifah Muhimmatul Mustaghfiroh Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Alfita Safitri Alfita Savitri Anisa Resti Anna Roosdiana Arie Srihardyastutie Arumdati, Rara Aulia Asnaili Alfi Nurillah Attasith Parnsubsakul Ayu Rahayu Anggraeni Azizah, Alfi Bambang Ismuyanto Barlah Rumhayati Barlah Rumhayati Barlah Rumhayati Chandrawati Cahyani Danar Purwonugroho Dewi Umaningrum Dewi, Latifah Tribuana Diah Mardiana Diah Mardiana Diah Mardiana Dian Nur Fajariati Didik Pramana Dwi Oktavianti Eka Krisnaniningrum, Elvian Eka Novitasari Elvian Eka Krisnaniningrum Elvian Eka Krisnaniningrum Enggar Dwi Prasetya, Desta Erasti Pratiwi Erica Marista Rosida Hanandayu Widwiastuti Hasanuddin Hasanuddin Helmi Auliyah Istiqomah Hermin Sulistyarti Ika Diah Safitri Intan Frina Utamiyanti Isvani, Nuzulul Kurniawan Khairunnisa, Alda Khoirul Ngibad Krisnaniningrum, Elvian Eka Layta Dinira Layta Dinira Mardhatillah Mardhatillah Maria Dewi Astuti Moftah Ali Mokhammad W. Dahlan Muhammad Iqbal Fahmi Muhimmatul Mustaghfiroh, Afifah Mustaghfiroh, Afifah Muhimmatul Nanang Tri Widodo Nareswari, Aninda Nashiroh, Ni'matun Nongnoot Wongkaew Nuzulul Kurniawan Isvani Oki Mandalia Antasari Okky Anggraito Patsamon Rijiravanich Pazar Ramadani, Dhody Ponco Prananto, Yuniar Prasetya, Desta Enggar Dwi Prayoga, Indrajid Qonitah Fardiyah Qonitah Fardiyah Rachmat Triandi Tjahjanto Radna Nurmasari Rahmani, Indri Alidha Ramadani, Dhody Pazar Rika Endara Safitri Risti, Sandria Gita Rizki Sugiri Roosdiana, Anna Rossy Dwi Adhi Pratiwi Rumhayati, Barlah Sabarudin, Akhmad Safitri, Alfita Sasangka Prasetyawan Sasangka Prasetyawan Sendy Kurniawan Septi Fajar Raeni Setyorini, Dian Ayu Soebiantoro soebiantoro Suryantoro, Angga Sutrisno, Sutrisno Ulfa Andayani Ulfa Andayani Ulfa Andayani, Ulfa Unsania Haresmawati Yuniar Ponco Prananto ZAINUL ABIDIN Zainuri, Akhmad