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All Journal HAYATI Journal of Biosciences Jurnal Ilmu Pertanian Indonesia Jurnal Teknologi Industri Pertanian VALENSI BERKALA FISIKA JURNAL KIMIA SAINS DAN APLIKASI Jurnal Penelitian Hasil Hutan The Journal of Pure and Applied Chemistry Research Journal of Engineering and Technological Sciences Jurnal Sains Dan Teknologi Lingkungan Majalah Obat Tradisional Jurnal Sains & Teknologi Lingkungan Jurnal Kimia Riset Jurnal Hasil Penelitian Industri INDONESIAN JOURNAL OF ESSENTIAL OIL Al-Kimia ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Biosaintifika: Journal of Biology & Biology Education Jurnal Purifikasi Chemistry Indonesian Journal of Chemical Research Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat ASEAN Journal on Science and Technology for Development Jurnal Jamu Indonesia Hisbah: Jurnal Bimbingan Konseling dan Dakwah Islam Jurnal Ilmiah Kebidanan Indonesia (Indonesian Midwifery Scientific Journal) Jurnal Penelitian Hasil Hutan Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) Milang Journal of Mathematics and Its Applications Analit: Analytical and Environmental Chemistry LIMNOTEK Indonesian Journal of Jamu Jurnal Penelitian Hasil Hutan MILANG Journal of Mathematics and Its Applications Analit: Analytical And Environmental Chemistry
Eti Rohaeti
Department Of Chemistry, Faculty Of Mathematics And Natural Science, IPB University, Bogor|IPB University|Indonesia;Tropical Biopharmaca Research Center, IPB University,Bogor|IPB University|Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Journal : VALENSI

 1 
Deteksi Simultan Kuersetin dan Rutin Menggunakan Screen-Printed Carbon Electrode Termodifikasi Grafena Tamida Elinda; Wulan Tri Wahyuni; Eti Rohaeti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 1, May 2019
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1239.326 KB) | DOI: 10.15408/jkv.v5i1.11203

Abstract

Kuersetin dan rutin merupakan senyawa antioksidan alami yang termasuk golongan flavonoid. Senyawa ini dapat dideteksi dengan beberapa teknik analisis, salah satunya dengan teknik elektrokimia. Pada penelitian ini, deteksi simultan kuersetin dan rutin dilakukan dengan teknik voltametri siklik menggunakan screen printed carbon electrode (SPCE) termodifikasi grafena. Elektrode disiapkan melalui modifikasi elektrode kerja SPCE dengan campuran grafena:natrium poliakrilat (1:1). Larutan etanol 70%:bufer fosfat pH 7 (6:4) digunakan sebagai elektrolit dalam pengukuran kuersetin dan rutin. Hasil penelitian menunjukkan puncak oksidasi kuersetin dan rutin terdeteksi pada potensial 0.179 V dan 0.310 V vs Ag/AgCl. SPCE termodifikasi grafena menghasilkan intensitas arus oksidasi dan sensitivitas yang lebih tinggi pada pengukuran kuersetin dan rutin. Deteksi simultan kuersetin dan rutin menggunakan SPCE termodifikasi grafena menunjukkan linearitas dengan R2 = 0.9905 dan R2 = 0.9816, masing-masing untuk kuersetin dan rutin. Limit deteksi pengukuran kuersetin dan rutin masing-masing sebesar 0.5369 mM dan 0.7495 mM serta limit kuantitasi sebesar 1.7898 mM dan 2.4985 mM. Presisi pengukuran kuersetin dan rutin memiliki nilai simpangan baku relatif (%SBR) sebesar 2.14% dan 2.44%, berturut-turut untuk kuersetin dan rutin. Hal ini menunjukkan bahwa SPCE termodifikasi grafena cukup potensial untuk deteksi simultan kuersetin dan rutin secara elektrokimia. Kata kunci: Grafena, kuersetin, rutin, screen printed carbon electrode, voltametri siklik. Quercetin and rutin are natural antioxidant from flavonoid group. The compounds can be detected using several analytical technique, including electrochemical technique due to its redox activity. In this study, simultaneous detection of quercetin and rutin was performed at graphene-modified screen printed carbon electrode (SPCE) using cyclic voltammetry technique. Graphene-modified SPCE was prepared from mixture of graphene:sodium polyacrylate (1:1) via drop casting method. Ethanol 70%:phosphate bufer pH 7 (6:4) was used as electrolyte solution for quercetin and rutin measurement. The result shows that oxidation peak of quercetin and rutin was detected at potential of 0.179 V and 0.310 V vs Ag/AgCl, respectively. Graphene-modified SPCE produce higher intensity of oxidation current and higher sensitivity for quercetin and rutin measurement. Simultaneous detection of quercetin and rutin at graphene modified SPCE provide linearity with R2 = 0.9905 and R2 = 0.9816, respectively for quercetin and rutin. Detection limits of quercetin and rutin respectively was 0.5369 mM and 0.7495 mM while limit quantitation was 1.7898 mM dan 2.4985 mM. Precision of quercetin and rutin measurement was moderate with percent relative standard deviation (%RSD) of 2.14% and 2.44%, consecutively for quercetin and rutin. This suggests that graphene-modified SPCE is potential for simultaneous electrochemical detection of quercetin and rutin. Keywords: Cyclic voltammetry, graphene, quercetin, rutin, screen printed carbon electrode.
Development of a Low-Cost Reflectance Visible Spectrophotometer with Chemometrics for Curcuma xanthorrhiza Roxb. Quality Control Heryanto, Rudi; Iswantini, Dyah; Rohaeti, Eti; Rafi, Mohamad; Rahma, Novia; Hafshah, Nurul; Mardiana, Eni
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.40351

Abstract

A simple, portable visible reflectance spectrophotometer was developed for classifying the quality of Curcuma xanthorrhiza Roxb. The device was assembled using consumer electronic components: an LED as the light source, a DVD optical layer as the diffraction grating, and a webcam as the detector, with web-based software (Spectral Workbench) as the signal processor. The spectrophotometer's performance was evaluated using standard Sudan III samples and powdered C. xanthorrhiza samples from two quality classes (A and B). Spectral data were analysed using principal component analysis (PCA) and partial least squares (PLS) regression.  PCA successfully grouped Sudan III samples by concentration and classified C. xanthorrhiza by curcuminoid content. A PLS regression model was developed for quantifying Sudan III, yielding R² values of 0.9909 for both calibration and cross-validation, with RMSEs of 0.3821% and 0.4152%, respectively. The results closely matched those from a commercial spectrophotometer. A PLS-discriminant analysis (PLS-DA) classification model for C. xanthorrhiza was also developed, achieving sensitivity and specificity values of 1. Additionally, semi-quantitative parameters such as decision limit (26.15% B), detection capability (41.06% B), and unreliability range (26.15–41.06% B) were calculated. The classification model showed strong sensitivity, specificity, and detection capabilities within acceptable limits. These findings suggest that this low-cost reflectance spectrophotometer, combined with chemometric methods, holds promise as a practical tool for the quality control of raw herbal materials.
Development of a Low-Cost Reflectance Visible Spectrophotometer with Chemometrics for Curcuma xanthorrhiza Roxb. Quality Control Heryanto, Rudi; Iswantini, Dyah; Rohaeti, Eti; Rafi, Mohamad; Rahma, Novia; Hafshah, Nurul; Mardiana, Eni
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.40351

Abstract

A simple, portable visible reflectance spectrophotometer was developed for classifying the quality of Curcuma xanthorrhiza Roxb. The device was assembled using consumer electronic components: an LED as the light source, a DVD optical layer as the diffraction grating, and a webcam as the detector, with web-based software (Spectral Workbench) as the signal processor. The spectrophotometer's performance was evaluated using standard Sudan III samples and powdered C. xanthorrhiza samples from two quality classes (A and B). Spectral data were analysed using principal component analysis (PCA) and partial least squares (PLS) regression.  PCA successfully grouped Sudan III samples by concentration and classified C. xanthorrhiza by curcuminoid content. A PLS regression model was developed for quantifying Sudan III, yielding R² values of 0.9909 for both calibration and cross-validation, with RMSEs of 0.3821% and 0.4152%, respectively. The results closely matched those from a commercial spectrophotometer. A PLS-discriminant analysis (PLS-DA) classification model for C. xanthorrhiza was also developed, achieving sensitivity and specificity values of 1. Additionally, semi-quantitative parameters such as decision limit (26.15% B), detection capability (41.06% B), and unreliability range (26.15–41.06% B) were calculated. The classification model showed strong sensitivity, specificity, and detection capabilities within acceptable limits. These findings suggest that this low-cost reflectance spectrophotometer, combined with chemometric methods, holds promise as a practical tool for the quality control of raw herbal materials.
Co-Authors A. KUSNANTO Abdul Rohman Achmad Fauzi Achmad Fauzi Ade Heri Mulyati, Ade Heri Aditya Kurniawan Aditya Kurniawan Agustina, Rofiqoh Inayati Aini, Nazwa Aisyah Akhmad Aghzath, Ananjaya Ali Mahmoud Muddathir Ali Mahmoud Muddathir Ali Miftahudin Anak Agung Gede Sugianthara Antonio Kautsar Arinana Arinana Arnold Patogi Siahaan Arnold Patogi Siahaan Aryo Tedjo Asih Gayatri Astrid Novita, Astrid Bambang Prajogo Eko Wardoyo Budi Riza Putra Budi Riza Putra Budi Riza Putra Budi Santoso, Arianto Casnan Casnan Casnan, Casnan Citra Ajeng Palupi Dea Nurafifah Dea Nurafifah Deden Saprudin Derry Permana Dewi Anggraeni Septaningsih Diposani, Diva Putri Djeni Hendra Djeni Hendra Djoko Santoso Dodi Nandika Dudy Imanuddin Effendy Dyah Iswantini Eni Sumarni Erliza Noor Erniati Fadila Karunina Febriani, Elsa Fendy Folkes Laumal Gunawan, Fransisca Hadjomidjojo, Hartrisari Hafshah, Nurul Hartrisari Hadjomidjojo Hartrisari Hardjomidjojo Herry Suhardiyanto Ibrahim Ibrahim Ibrahim Ida Ayu Putu Sri Widnyani Irene, Angelina Irma Isnafia Arief Irmanida Batubara Irzaman, Irzaman Jaharuddin Jaharuddin, Jaharuddin Karomah, Alfi Hudatul Khoirotul Muzayanah KUSNANTO, A. Latifah K Darusman Latifah K Darusman Latifah K. Darusman Latifah K. Darusman Latifah Kosim Darusman Latifah Kosim Darusman Lina Karlinasari Linda Trivana Linda Trivana Linda Trivana, Linda Lucia Dhiantika Witasari, Lucia Dhiantika M. Rafi Madya, Muhammad Miftahul Makmum Syafi’i Manggar Arum Aristri Mardiana, Eni Moh Arif Rohman Nur Hakim Moh Nur Hakim Mohamad Rafi Mohamad Solahudin Muddathir, Ali Mahmoud Muhammad Bachri Amran Munandar, Rafly N. G. Pamungkas Novia Rahma Nur Adi Saputra Nur Adi Saputra Nurdiani Nurdiani, Nurdiani Nurhajawarsi Nurhajawarsi Nursifa Mawadah Purnawan Purnawan Purnawan Purnawan Putri, Silvi Agusri Rachmayanti, Yanti Rahadyanoto Trimulia Rahmawati, Heni Rahmawati, Wahyu Riski Ramadhanti, Desi Reni Febriani Reni Febriani, Reni Rinaldi Idroes Rudi Heryanto Santoso, Arianto Budi Satriah, Lilis - Septaningsih, Dewi Anggraini Shadila Fira Asoka Siahaan, Arnold Patogi Silvia, Riva Siti Aisyah Slamet Widodo Sri Sugiarti Supriyanto Syafi’i, Makmum Syifa Muflihah Tamida Elinda Taopik Ridwan Trisni Untari Dewi Ummu Salma Al Azizah Uswatun Hasanah Utami Dyah Syafitri Wulan Tri Wahyuni Yudiwanti Yuspian Nur Zaenal Abidin