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All Journal Jurnal Ilmu Pertanian VALENSI CHEMISTRY PROGRESS Jurnal Sains Dasar Alchemy : Journal of Chemistry Jurnal Ilmu Kimia Universitas Brawijaya The Indonesian Green Technology Journal Natural B The Journal of Pure and Applied Chemistry Research Program Kreativitas Mahasiswa - Penelitian Majalah Kesehatan FKUB Indonesian Journal of Chemistry Jurnal Saintek Lahan Kering Molekul: Jurnal Ilmiah Kimia jurnal Ilmu Pertanian (Agricultural Science) JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Bubungan Tinggi: Jurnal Pengabdian Masyarakat Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Makara Journal of Science al Kimiya : Jurnal Ilmu Kimia dan Terapan

Hermin Sulistyarti

Brawijaya University

Author-ID : 391367

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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The development of smart screening technology kit (SST-Kit) for sorting cassava cultivars based on cyanide analysis Luluil Maknun; Noerma Juli Azhari; Mike Nur Izzati; Rizal Nur Huda; Abdul Malik Bahrudin; Erliana Ginting; Hermin Sulistyarti
Jurnal Ilmu Pertanian Vol 5, No 1 (2020): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Cyanides are deadly toxic substances commonly found in cassava root tuber. Higher content of cyanides causes bitter taste of the root tuber. Therefore, analysis of cyanide content has been used as one of criteria for bitterness in cassava. The substitute common method used for this purpose was organoleptic test that could lead to poisoning, or argentometry, which is complicated, time-consuming, and requires lots of reagents. Therefore, a fast, easy, and safe method is strongly demanded. In this work, a smart screening technology kit (SST-Kit) was developed using ninhydrin reagent. This simple, fast, and low-cost method can be applied in the field for the analysis of cyanide levels in cassava. This method was optimized to the concentration of sodium carbonate from 0.5 to 2.0% by measuring the red color intensity produced under various times of reading from 1 to 3 minutes and three sample preparation techniques. The optimum condition for SST-Kit to read the cyanides level was achieved under the condition of 0.5% of sodium carbonate with a time readout of 2 minutes, using grinding preparation technique followed by dilution. The SST-kit had been applied on cassava samples with the accuracy of more than 90%.

Production of Organic Polymer Based Monolithic Columns for Anion Separation using High Performance Liquid Chromatography Dewi Annisa’; Aprilia Nur Tasfiyati; Hermin Sulistyarti; Akhmad Sabarudin
Natural B, Journal of Health and Environmental Sciences Vol 3, No 1 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Methacrylate-based monolithic columns have been prepared in silanized silicosteel column (100 ´ 0.5 mm id) by in situ polymerization reaction, using glycidyl methacrylate (GMA) as monomer, ethylene dimethacrylate (EDMA) as crosslinker, porogen (1-propanol, 1,4 butandiol, water) and initiator AIBN. Monolith poly-(GMA-co-EDMA) was then modified with diethylamine and benzyl chloride to obtain ammonium quartener as strong anion exchanger. From the characterization of 4 monolith in this study, monolithic columns poly-(GMA-co-EDMA) with %T 40, %C 25 and polymerization time 24 h has good mechanical stability and permeability, adequate molecular recognition sites (indicated by binding capacity value of 10,119 mg/mL), and has good proportion of flow throughpore and mesopores (45,04% and 41,32% respectively). It can successfully separate the mixture sample of anion consisting of fluoride, bromide, sulfate and nitrate ions by indirect UV detection.

Characterization of the Curcuminoids Fingerprint Profile in Curcuma and Zingiber Genera by TLC – Digital Image Analysis Anisa Lailatusy Syarifah; Rurini Retnowati; Hermin Sulistyarti
The Journal of Pure and Applied Chemistry Research Vol 8, No 2 (2019): Edition May-August 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.02.462

Curcuma longa, C. xanthorrhiza, C. heyneana, and Zingiber cassumunar contain high curcuminoid and have relatively the similar yellow color. Therefore, that they are potentially adulterated and difficult to differentiate in the form of powder. Hence, it is necessary to characterize the fingerprints compound profile by a simple and rapid method. This research aims to determine fingerprint compound profile of curcuminoid using Thin Layer Chromatography (TLC) and digital image analysis. The result of the research identified that the fingerprint compound profile of curcuminoid on the four rhizomes was obtained by TLC method using silica gel 60 GF254 as the stationary phase, chloroform:dichloromethane:methanol (13:6:1) as the mobile phase, and observation under UV 254 nm light and citroborate reagent. Thereafter, the digital image analysis was carried out using Image J software according to the gray value and % of RGB (red-green-blue) value. Based on gray value and % of RGB, both Curcuma and Zingiber genera were differentiated through curcumin compound (Rf 0.63), demethoxycurcumin (Rf 0.34), bisdemethoxycurcumin (Rf 0.21). The profile of fingerprint compound on Curcuma longa, C. xanthorrhiza, C. heyneana, and Zingiber cassumunar was differentiated through Rf 0.26; Rf 0.17; and Rf 0.10.

Modification of Electrode Using Arrowroot Starch Membrane for Uric Acid Determination Elvian Eka Krisnaniningrum; Ani Mulyasuryani; Hermin Sulistyarti
Molekul Vol 16, No 3 (2021)
Publisher : Universitas Jenderal Soedirman

Arrowroot starch membrane-modified glassy carbon electrode were constructed for the determination of uric acid. The membrane consist of arrowroot starch, polyvinyl alcohol, uric acid, and crosslinker. The crosslinker used was sodium tripolyphosphate, citric acid, and glutaraldehyde. Carbon material was added to increase the sensitivity. The composition of membrane influences the electrodes sensitivity. The best composition of arrowroot starch membrane is UA1 using 0.1% uric acid in membrane and STPP as crosslinker. The linearity concentration, sensitivity, and detection limit were 100-500 µM, 0.0509 A/M and 76 µM, respectively.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.11512

DEVELOPMENT OF FLOW INJECTION METHOD FOR ONLINE DETERMINATION OF THIOCYANATE BASED ON OXIDATION BY PERMANGANATE Hermin Sulistyarti; Spas D. Kolev; Stephanie Lim
Indonesian Journal of Chemistry Vol 10, No 2 (2010)
Publisher : Universitas Gadjah Mada

The importance of developing method for thiocyanate becomes obvious, because thiocyanate can inhibit iodine uptake of thyroid gland leading to mumps disease. In this work, thiocyanate is oxidized by permanganate in the acid donor stream to cyanide, which is directly converted to hydrogen cyanide. Then, hydrogen cyanide diffuses through a Teflon membrane into acceptor stream containing nickel(II) in ammoniacal buffer to form tetracyanonickelate(II) which is detected spectrophotometrically at 267 nm. Analytical figures of merit were linear up to 50 mg L-1 for thiocyanate, with RSD of 1.34%, and detection limit of 0.07 mg L-1, respectively. Interfering anions were eliminated under stoichiometric amount of permanganate and sample throughput was 20 h-1. The method was validated for determining thiocyanate samples from synthetic and gold process waters with satisfactory results.

PENENTUAN KREATININ DALAM URIN SECARA KOLORIMETRI DENGAN SEQUENTIAL INJECTION-FLOW REVERSAL MIXING (SI-FRM) Hermin Sulistyarti
Jurnal Sains dan Terapan Kimia Vol 5, No 2 (2011)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Sequential injection analysis (SIA), generasi kedua dari sistem injeksi alir telah dikembangkan untuk penentuan kreatinin sebagai indeks medis kegagalan ginjal kronis. Pendeteksian kreatinin didasarkan pada reaksi Jaffe yang terjadi antara kreatinin dan asam pikrat dalam medium basa untuk membentuk senyawa berwarna merah-oranye. Absorbansi dari senyawa yang terbentuk diukur pada panjang gelombang 530 nm. Dalam penelitian ini, suatu konsep baru dari SIA yang disebut “lab-at-valve” dikembangkan dengan menambahkan suatu Valve Mixing sebagai tempat untuk memaksimalkan pembentukan senyawa antara kreatinin dan alkali-pikrat. Parameter-parameter yang mempengaruhi metode ini antara lain laju alir produk, waktu delay, volume sampel, volume reagen, konsentrasi reagen dan senyawa pengganggu telah dipelajari secara rinci. Dari hasil penelitian diperoleh bahwa kondisi optimum akan tercapai pada laju alir 20 μL/detik, waktu delay 5 detik, komposisi penggunaan 100 μL sampel dengan 300 μL reagen (asam pikrat 0,03 M dan NaOH 3 %) sehingga limit deteksi pada penentuan kreatinin yang dihasilkan sebesar 3,01 μg/g. Aplikasi dari metode ini ditujukan untuk penentuan kreatinin dalam sampel urin. Kata kunci : Kreatinin, reaksi Jaffe, SI-VM, RGB kolorimetri, urin

ARAKTERISASI ELEKTRODA SELEKTIF ION (ESI) RODAMINA B BERMEMBRAN POLIMER CAMPURAN PVC – DOP DENGAN KITOSAN SEBAGAI CARRIER Tuti Kurniati; Atikah Atikah; Hermin Sulistyarti
Jurnal Sains dan Terapan Kimia Vol 7, No 1 (2013)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Tujuan penelitian ini membuat dan mengkarakterisasi Elektroda Selektif Ion (ESI) sebagai metode alternatif dalam penentuan Rodamina B secara kuantitatif pada makanan. Metode Elektroda Selektif Ion mudah digunakan untuk pengukuran di lapangan dan hasil pengukurannya memiliki sifat selektif dan sensitif. Elektroda Selektif Ion terdiri atas 4 bagian yaitu : Badan elektroda yang terbuat dari plastik polietilen, konduktor berupa kawat platina, membran menggunakan bahan aktif kitosan dan kabel koaksial RG 58 sebagai penghubung Elektroda Selektif Ion pada potensiometer. Optimasi komposisi membran yang kompatibel dan homogen pada ESI Rodamina B dilakukan dengan % berat perbandingan Kitosan:PVC:DOP adalah (4:32:64 ; 4:34:62 ; 4:35:61 ; 5:34:61; 5:35:60 dan 6:35:59). Total keseluruhan berat membran adalah 1 g dalam pelarut tetrahidrofuran (THF) dengan perbandingan 1:3 (b/v) yang dilapiskan pada kawat platina. Pengaruh waktu prakondisi (dopan) dilakukan dengan tujuan meningkatkan konduktivitas membran ESI yang telah dibuat. Perendaman membran dilakukan dalam larutan RCOONa 0,5 M dengan variasi waktu perendaman membran ESI selama 10, 20, 30, 40, 50, 60, 70 dan 80 menit. Karakterisasi sifat dasar ESI yang dibuat meliputi: faktor Nernst, kisaran konsentrasi pengukuran, batas deteksi, waktu respon, dan life time. Hasil penelitian menunjukkan bahwa ESI yang dibuat menghasilkan karakteristik optimum untuk pengukuran analisis dengan faktor Nernst 58,86 mV/dekade konsentrasi, batas deteksinya 5,79 ppm, waktu respon yang cepat berkisar 30 detik dan memiliki life time hingga 45 hari. Komposisi penyusun membran optimal perbandingan kitosan:PVC:DOP adalah 4:34:62 dengan waktu perendaman optimum 30 menit. Kata kunci : rodamina B, pewarna makanan, elektroda selektif ion (ESI)

ENGARUH KONSENTRASI AMONIA DALAM PROSES PEMBENTUKAN KOMPLEKS Au(NH3)2+ Dewi Umaningrum; Ani Mulyasuryani; Hermin Sulistyarti
Jurnal Sains dan Terapan Kimia Vol 6, No 2 (2012)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Telah dilakukan penelitian tentang pengaruh konsentrasi ammonia dalam proses pembentukan kompleks Au(NH3)2+. Tahapan dalam penelitian ini yaitu proses pelarutan serbuk emas dalam larutan ammonia pada beberapa konsentrasi ammonia dan kemudian diukur besarnya konsentrasi emas yang terlarut yang menunjukkan jumlah kompleks Au(NH3)2+ yang terbentuk. Hasil penelitian menunjukkan bahwa konsentrasi ammonia optimum pada proses pembentukan kompleks Au(NH3)2+ sebesar 7 M dengan jumlah Au terlarut sebesar 0,618 ppm. Kata kunci : kompleks Au(NH3)2+, ammonia.

KARAKTERISASI ELEKTRODA SELEKTIF ION (ESI) KROMAT TIPE KAWAT TERLAPIS BERBASIS KITOSAN Dedeh Kurniasih; Atikah Atikah; Hermin Sulistyarti
Jurnal Sains dan Terapan Kimia Vol 7, No 1 (2013)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Telah dibuat dan dikarakterisasi suatu elektroda selektif ion (ESI) kromat tipe kawat terlapis. Komposisi optimum membran didapatkan dari campuran kitosan, alikuot 336-kromat, polivinilklorida (PVC) dan dioktilftalat (DOP) sebagai plasticizer dengan perbandingan 4:0,5:35:60,5 (% b/b) dalam pelarut THF (1:3 b/v). Penambahan alikuot 336-kromat dalam membran dengan bahan aktif kitosan dapat meningkatkan konduktivitas membran sehingga dapat menghasilkan karakter sifat dasar. Karakteristik dasar elektrode selektif ion kromat memberikan karakteristik optimum dengan faktor Nernst 29,77 mV/dek, rentang konsentrasi linier 10-6–10-1 M, waktu respon 40 detik, batas deteksi 1,95 x 10-6 M, usia pemakaian 49 hari. Kata Kunci: elektroda selektif ion (ESI) tipe kawat terlapis, ion kromat, kitosan, alikuot 336-kromat

Co-Authors 'Aisy, Kamila Rohadatul Abdjan, Muhammad Ikhlas Abdul Malik Bahrudin Abner Tonu Lema Adam Wiryawan Afidatul Muadifah Ahmad Luthfi Fahmi Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Ani Mulyasuryani Antesar Elmagirbi Aprilia Nur Tasfiyati Asdauna Zahrotun Nisa Asdauna, Asnaili Alfi Nurillah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah Atikah, Atikah, atikah Aulani`am Aulani`am Aulanni`am, Aulanni`am Balqis Milda, Balqis Barlah Rumhayati Bheta Sari D, Bheta Sari Chanif Mahdi Chanif Mahdi Dedeh Kurniasih Dedeh Kurniasih Dewi Annisa’ Dewi Setyowati Dewi Umaningrum Diana Candra Dewi Eka Ratri Noor Wulandari Elvian Eka Krisnaniningrum Erliana Ginting Erwin Sulistyo Erwin Sulistyo Fahmi, Ahmad Luthfi Fahrana Salas Trenggamayu Nelgi Febriyanti, Sita Gunawan, David Herman Tolle Hikmanita Lisan Nashukha Hilda Emilia Fahriyani, Hilda Emilia Ika Oktavia Wulandari Imam Riva’i Indriana, Silvi Avianti Kamila Rohadatul ‘Aisy Khanifah, Nurul Krisna Rendi Awalludin Kusumaningtyas, Nadia Mira Kusumawardhani, Nury Lale B Rahayu Lilik Suryati Luluil Maknun Mariam Mohamed Omar Alshibani Mega Madha Wijaya Mike Nur Izzati Mochammad Imron Awalludin Mufidah Sari, Puspita Muhammad Iqbal Fahmi Noerma Juli Azhari Novy Lailatuz Zulfah Nury Kusumawardhani Palupi, Endah Sekar Puspitaloka, Paradhita Ayu Putra, Bhurman Pratama Putra, Boyfannie Ivan Putra, Chairil Anjasmara Robo Putri Dini Putri, Krista Firdaus Suwarno Putri, Lani Artana Qonitah Fardiyah Qonitah Fardiyah Qurrata Ayun Rizal Nur Huda RR. Ella Evrita Hestiandari Rurini Retnowati Rurini Retnowati Sasangka Prasetyawan Silvi Avianti Indriana Sita Febrianti Spas D. Kolev Stephanie Lim Sutrisno Sutrisno Syarifah, Anisa Lailatusy Tea, Marselina Theresia Djue Tuti Kurniati Tuti Kurniati Yudha Ikoma Istanti Yulia Dwi Cahyani, Yulia Dwi Zulfah, Novy Lailatuz Zuri Rismiarti

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