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All Journal Matematika dan Sains Journal Of Research and Education Chemistry (JREC) Unesa Journal of Chemistry

Maria Monica Sianita

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Author-ID : 315504

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Materials Science & Nanotechnology Mathematics

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PEMANFAATAN BENTONIT TERPILAR SEBAGAI KATALIS REAKSI ESTERIFIKASI LANGSUNG SENYAWA TABIR SURYA OKTIL p-METOKSISINAMAT Subekti Wibowo, ; Maria Monica Sianita, ; Titik Taufikurahmah,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

The goal of research were to find percent yield of octyl p-metoxycinnamat (OPMS) obtained from direct esterification between p-metoxycinamic acid and n-octanol using the Zinc pillaring bentonite as catalyst. Zinc pillaring bentonite was made by mixing the bentonite and pillaring agent at 80 oC for 50 menutes. OPMS was prepared by heating p-metoxycinamic acid and n-octanol using zinc pillaring bentonite for 4 hours at 60-70 oC. Structure of OPMS was identified by spectroscopic methods including UV-Vis and IR spectrophotometer, while percent yield was determined using densitometry method. Based on this research, percent yield of OPMS was 42,4196 %.oC for 50 menutes. OPMS was prepared by heating p-metoxycinamic acid and n-octanol using zinc pillaring bentonite for 4 hours at 60-70 oC. Structure of OPMS was identified by spectroscopic methods including UV-Vis and IR spectrophotometer, while percent yield was determined using densitometry method. Based on this research, percent yield of OPMS was 42,4196 %.

PENGARUH SUHU PADA SINTESIS MOLECULARLY IMPRINTED POLYMER (MIP) TERHADAP KEMAMPUAN ADSORPSI KLORAMFENIKOL Excel Aida Fransiska; Maria Monica Sianita
Unesa Journal of Chemistry Vol 10 No 3 (2021)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The purpose of this research was to determine the effect of temperature on the synthesis of Molecularly Imprinted Polymer (MIP) on the adsorption capability of cloramphenicol and for analyze the functional groups of the best polymers that were analyzed using Fourier Transform Infrared (FTIR) instrument. In this research, MIP has been made with variations in temperature of 60oC, 70oC, and 80oC using the precipitation method with chloramphenicol (CAP) as the template, ethyleneglycol dimethacrylate (EDGMA) as a crosslinker, methacrylic acid (MAA) as a monomer, acetonitrile as a porogen, and benzoyl peroxide (BPO) as a initiator. The ratio of CAP: MAA: EDGMA is 1: 3: 18 with 30 mL of porogen acetonitrile. The results showed that the temperature of 80oC resulted in the best Q adsorption of 4.286 mg/g with an Imprinting Factor (IF) value of 5.977 and percent of extraction of 96.66%. FTIR characterization showed that in Non-Imprinted Polymer (NIP) there was absorption of -NO2 functional groups at wave number 1521.77 cm-1, while in MIP and blank polymer (PB) there was no absorption of -NO2 groups. Key words: Molecularly Imprinted Polymer, chloramphenicol, precipitation method, temperature

PENGARUH VARIASI KOMPOSISI EKSTRAKTAN TERHADAP KEMAMPUAN ADSORPSI KLORAMFENIKOL MENGGUNAKAN MOLECULARLY IMPRINTED POLYMER (MIP) Eucharistia Oktavia Firda Listiadi; Maria Monica Sianita
Unesa Journal of Chemistry Vol 10 No 3 (2021)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The aim of this study is optimazing the extractant composition of methanol:acetic acid was with variations of 90:10(v/v), 85:15(v/v), and 80:20(v/v) in the (Molecularly Imprinted Polymer- Chloramphenicol) MIP-CAP synthesis. MIP-CAP is obtained from (Non Imprinted Polymer)NIP through the template extraction process. The template was extracted using maceration method and analyzed using High Performance Liquid Chromatography (HPLC) to determine the extracted CAP. The best extractant composition variation was determined based on % extraction and adsorption capability. The characterization of the MIP-CAP polymer was carried out using Fourier Transform Infra Red (FTIR) to see the presence of the –NO2 group. In this study, the best composition of methanol:acetic acid extractant was 80:20 (v/v) (20% acetic acid) with extraction % gain of 89,5158% and adsorption capability of 4,0725 mg/g with the value of Imprinting Factor (IF) of 3.7369. The higher the addition of acetic acid, the higher the % extraction and adsorption capability. The FTIR characterization of MIP-CAP showed that there was no absorption of the –NO2 group. Key words: CAP, MIP-CAP, Composition of Extractant

PENGARUH KONSENTRASI KLORAMFENIKOL TERHADAP ADSORPSI POLIMER CETAK MOLEKUL DENGAN METODE PRESIPITASI Ainun Rachmatina Atqa; Maria Monica Sianita
Unesa Journal of Chemistry Vol 10 No 3 (2021)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The aims of this study to synthesize Molecularly Imprinted Polymer (MIP) which can be used as adsorbents for chloramphenicol adsorption (CAP). The performance of the MIP adsorbent was tested for adsorption with variations in the initial CAP concentration. The CAP concentrations used were 10, 25, and 50 ppm. The characterization of the resulting MIP, Non-Imprinted Polymer (NIP), and Blank Polymer (PB) were analyzed using Fourier Transform Infrared (FTIR), to determine the -NO2 group. The results showed that the greater the initial CAP concentration, the higher the adsorption capability in MIP and PB. The largest adsorption capability in this study for MIP was 16.54 mg/g and PB was 8.78 mg/g at a concentration of 50 ppm. MIP has a higher adsorption capability than PB due to the specific adsorption of MIP to CAP. The imprinting factor (IF) value obtained is 1.88. FTIR results showed the presence of –NO2 group at wave number 1560.62 cm-1 in MIP with a lower intensity than NIP. This indicates the presence of CAP that has been eluted in the extraction process. Key words: Molecularly Imprinted Polymer, chloramphenicol, adsorption

PENGARUH JUMLAH CROSSLINKER PADA SINTESIS MOLECULARLY IMPRINTED POLYMER (MIP) TERHADAP KEMAMPUAN ADSORPSI KLORAMFENIKOL Maria Monica Sianita; Magdalena Butar Butar
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

This study aims to determine the effect of variations in the amount of crosslinker on the adsorption capability of Molecularly Imprinted Polymer (MIP)-Chloramphenicol (CAP) which was analyzed using the High-Performance Liquid Chromatography (HPLC) instrument and identify the –NO2 functional group in the polymer with the best variation in the amount of crosslinker using the instrument. Fourier Transform Infrared Spectroscopy (FTIR). In this study, MIP was synthesized using CAP as a template, ethylene glycol dimethacrylate (EGDMA) as a crosslinker, methacrylic acid (MAA) as a monomer, benzoyl peroxide (BPO) as an initiator, and acetonitrile as a porogen. The results showed that the variation in the number of crosslinkers affected the adsorption capability of MIP with the composition between CAP: MAA: EGDMA, namely 1:3:18, resulting in the largest adsorption capability of 2,2 mg/g with an extraction percentage of 66.11%. The results of functional group identification with FTIR showed that NIP contained –NO2 group at wave number 1524.27 cm-1 while in MIP no –NO2 group was detected because most of the CAP had been extracted, and PB was made as a control polymer without adding template CAP. Keywords: Chloramphenicol, Molecularly Imprinted Polymer, Crosslinker, Adsorption Capability

PENGARUH JUMLAH POROGEN PADA SINTESIS MIP (MOLECULARLY IMPRINTED POLYMER) TERHADAP ADSORPSI MIP-KLORAMFENIKOL Maria Monica Sianita; Trifena Meysia Yusuf
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The purpose of this study was to determine the effect of porogen acetonitrile volume during the synthesis of Molecularly Imprinted Polymer (MIP) toward the adsorption capability of chloramphenicol and to determine the characteristics of the functional groups contained in Non Imprinted Polymer (NIP) and MIP. The porogen variations used were 30 mL, 45 mL, dan 60 mL. The effect of volume of porogen to adsorption capability will be measured using High Performance Liquid Chromatography (HPLC) instruments, while the functional groups on NIP and MIP will be characterized using Fourier Transform Infra Red (FTIR). MIP was synthesized using the precipitation method. The results showed that the 60 mL of the porogen variation gave the highest adsorption capability value compared to other variation which was 7.32 mg/g. Characterization with FTIR showed that the presence of NO2 group in NIP which was indicated at wave number 1517.56 cm-1 and 1549,08 cm-1 while in MIP the NO2 group was detected at wave number 1553.07 cm-1 with lower intensity. Key words: MIP, chloramphenicol, acetonitrile, adsorption capability.

Karakterisasi Abu Sekam Padi dengan Menggunakan XRD samik samik; Nita Kusumawati; Maria Monica Sianita; Dina Kartika Maharani; Amalia Putri Purnamasari; Mukhlash Imaduddin; M Iqbal Al Ghifari
Unesa Journal of Chemistry Vol 11 No 3 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Rice husk ash is a material that mostly contains silica (SiO2). Silica can be used as a raw material for various industries. This research is an experimental study, covering the synthesis of rice husk ash with various calcination temperatures, namely 800 oC, 900 oC, and 1000 oC. The purpose of this study was to identify the type of solid and crystalline phases of RHA so that the results of this study could be used as a basis for further research on the use of RHA. The results of the synthesis produced four types of samples, namely samples calcined at a temperature of 800 oC (coded S-800), calcined at 900 oC was gray (S-900 A), calcined at 900 oC was white (S-900 P), and samples were calcined at a temperature of 1000 oC (S-1000). Characterization using X-Ray Diffraction (XRD) showed that all samples included crystalline solids with the tridymite crystal phase and cristobalite were detected in samples S-800, S-900 P, S-900 A, and S-1000. Cristobalite and tridymite are silica mineral polymorphs with the same chemical formula as quartz, SiO2, but have different crystal structures. The percentage of crystallinity of the sample was calculated by comparing the sample which has the highest peak intensity (S-1000). The crystallinity results for S-1000, S-900 P, and S-900 A were 100%, 96%, 79%, and 32%. The lower the calcination temperature, the smaller the percentage of crystallinity. Keywords: rice husk ash, calcined, silica, XRD, crystalline solid

Pengaruh Bufer Asetat Terhadap Kemampuan Adsorpsi Ion Timbal(II) Menggunakan Ion Imprinted Polymer (IIP) Termodifikasi Ligan EDTA Santos, Cesno Pereira Lorenzo Dos Santos; Maria Monica Sianita
Journal of Research and Education Chemistry Vol. 6 No. 2 (2024): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2024.vol6(2).19010

Timbal adalah salah unsur logam yang mempunyai tingkat toksisitas cukup tinggi dan jika terpapar dapat menganggu kesehatan manusia. Berbagai metode untuk removal ion timbal(II) mempunyai kelemahan kemampuan adsorpsi yang rendah, karena bekerja pada pH tertentu. Ion Imprinted Polymer (IIP) adalah adsorben yang sangat efektif dalam removal ion timbal(II). IIP pada penelitian ini telah berhasil disintesis menggunakan metode presipitasi dengan menggunakan material seperti etilendiamintetraasetat (EDTA) (ligan), asam metakrilat (MAA) (monomer), etilen glikol dimetakrilat (EGDMA) (crosslinker), etanol-asetonitril (2:1) (porogen). Tujuan dari penelitian ini untuk menentukan pH optimum bufer fosfat terhadap kemampuan adsorpsi ion timbal(II) pada IIP termodifikasi ligan EDTA. Metode ekstraksi ion timbal(II) dari kerangka polimer menggunakan 1 mol/L asam nitrat. Hasil pengulangan ekstraksi dan cucian dengan akuademin menunjukkan konsentrasi ion timbal(II) terendah pada pencucian ke-4. Hasil penelitian diperoleh nilai pH optimum bufer asetat untuk adsorpsi ion timbal(II) pada pH 5,6 dengan persentase adsorpsi sebesar 30,45%.

Co-Authors Ainun Rachmatina Atqa Amalia Putri Purnamasari DINA KARTIKA MAHARANI Eucharistia Oktavia Firda Listiadi Excel Aida Fransiska M Iqbal Al Ghifari Magdalena Butar Butar Mukhlash Imaduddin Nita Kusumawati Samik Samik Santos, Cesno Pereira Lorenzo Dos Santos Subekti Wibowo Titik Taufikurahmah Trifena Meysia Yusuf

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